diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index da9500c98394..af38873fe1ef 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,9 +25,9 @@ jobs:
           - 6379:6379
         options: --entrypoint redis-server
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
-        php: [7.2, 7.3, 7.4]
+        php: [7.2, 7.3, 7.4, 8.0]
         stability: [prefer-lowest, prefer-stable]
 
     name: PHP ${{ matrix.php }} - ${{ matrix.stability }}
@@ -47,8 +47,32 @@ jobs:
       - name: Setup Memcached
         uses: niden/actions-memcached@v7
 
-      - name: Install dependencies
-        run: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress
+      - name: Setup problem matchers
+        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+      - name: Install PHP 7 dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer update --prefer-dist --no-interaction --no-progress
+        if: "matrix.php < 8"
+
+      - name: Setup PHP 8 Dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer require "phpunit/phpunit:^9.3.2" "doctrine/dbal:^3.0" --no-update --no-interaction
+        if: "matrix.php >= 8"
+
+      - name: Install PHP 8 Dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress --ignore-platform-req=php
+        if: "matrix.php >= 8"
 
       - name: Execute tests
         run: vendor/bin/phpunit --verbose
@@ -60,9 +84,9 @@ jobs:
 
     runs-on: windows-latest
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
-        php: [7.2, 7.3, 7.4]
+        php: [7.2, 7.3, 7.4, 8.0]
         include:
           - php: 7.2
             stability: prefer-lowest
@@ -70,6 +94,8 @@ jobs:
             stability: prefer-stable
           - php: 7.4
             stability: prefer-stable
+          - php: 8.0
+            stability: prefer-stable
 
     name: PHP ${{ matrix.php }} - ${{ matrix.stability }} - Windows
 
@@ -89,10 +115,33 @@ jobs:
           extensions: dom, curl, libxml, mbstring, zip, pdo, sqlite, pdo_sqlite, gd, pdo_mysql, fileinfo, ftp
           tools: composer:v2
           coverage: none
-          ini-values: memory_limit=512M
 
-      - name: Install dependencies
-        run: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress
+      - name: Setup problem matchers
+        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+      - name: Install PHP 7 Dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer update --prefer-dist --no-interaction --no-progress
+        if: "matrix.php < 8"
+
+      - name: Setup PHP 8 Dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer require "phpunit/phpunit:^9.3.2" "doctrine/dbal:^3.0" --no-update --no-interaction
+        if: "matrix.php >= 8"
+
+      - name: Install PHP 8 Dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress --ignore-platform-req=php
+        if: "matrix.php >= 8"
 
       - name: Execute tests
         run: vendor/bin/phpunit --verbose
diff --git a/composer.json b/composer.json
index 5f09147f5675..c4f4b480e331 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-openssl": "*",
@@ -23,9 +23,9 @@
         "dragonmantank/cron-expression": "^2.0",
         "egulias/email-validator": "^2.1.10",
         "league/commonmark": "^1.3",
-        "league/flysystem": "^1.0.34",
+        "league/flysystem": "^1.1",
         "monolog/monolog": "^1.12|^2.0",
-        "nesbot/carbon": "^2.0",
+        "nesbot/carbon": "^2.31",
         "opis/closure": "^3.1",
         "psr/container": "^1.0",
         "psr/simple-cache": "^1.0",
@@ -78,15 +78,15 @@
     },
     "require-dev": {
         "aws/aws-sdk-php": "^3.0",
-        "doctrine/dbal": "^2.6",
+        "doctrine/dbal": "^2.6|^3.0",
         "filp/whoops": "^2.4",
         "guzzlehttp/guzzle": "^6.3|^7.0",
         "league/flysystem-cached-adapter": "^1.0",
-        "mockery/mockery": "^1.3.1",
+        "mockery/mockery": "~1.3.3|^1.4.2",
         "moontoast/math": "^1.1",
         "orchestra/testbench-core": "^4.0",
         "pda/pheanstalk": "^4.0",
-        "phpunit/phpunit": "^7.5.15|^8.4|^9.0",
+        "phpunit/phpunit": "^7.5.15|^8.4|^9.3",
         "predis/predis": "^1.1.1",
         "symfony/cache": "^4.3.4"
     },
@@ -120,7 +120,7 @@
         "ext-posix": "Required to use all features of the queue worker.",
         "ext-redis": "Required to use the Redis cache and queue drivers (^4.0|^5.0).",
         "aws/aws-sdk-php": "Required to use the SQS queue driver, DynamoDb failed job storage and SES mail driver (^3.0).",
-        "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6).",
+        "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6|^3.0).",
         "filp/whoops": "Required for friendly error pages in development (^2.4).",
         "fzaninotto/faker": "Required to use the eloquent factory builder (^1.9.1).",
         "guzzlehttp/guzzle": "Required to use the Mailgun mail driver and the ping methods on schedules (^6.0|^7.0).",
diff --git a/src/Illuminate/Auth/composer.json b/src/Illuminate/Auth/composer.json
index 21ae73751ce9..cf15de456bed 100644
--- a/src/Illuminate/Auth/composer.json
+++ b/src/Illuminate/Auth/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/http": "^6.0",
         "illuminate/queue": "^6.0",
diff --git a/src/Illuminate/Broadcasting/composer.json b/src/Illuminate/Broadcasting/composer.json
index cc050e135d73..8c82aa4e90de 100644
--- a/src/Illuminate/Broadcasting/composer.json
+++ b/src/Illuminate/Broadcasting/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "psr/log": "^1.0",
         "illuminate/bus": "^6.0",
diff --git a/src/Illuminate/Bus/composer.json b/src/Illuminate/Bus/composer.json
index 63743abab856..2751d8923669 100644
--- a/src/Illuminate/Bus/composer.json
+++ b/src/Illuminate/Bus/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/pipeline": "^6.0",
         "illuminate/support": "^6.0"
diff --git a/src/Illuminate/Cache/RedisTaggedCache.php b/src/Illuminate/Cache/RedisTaggedCache.php
index 208ae94661be..ad50ce9adb41 100644
--- a/src/Illuminate/Cache/RedisTaggedCache.php
+++ b/src/Illuminate/Cache/RedisTaggedCache.php
@@ -179,7 +179,7 @@ protected function deleteValues($referenceKey)
 
         if (count($values) > 0) {
             foreach (array_chunk($values, 1000) as $valuesChunk) {
-                call_user_func_array([$this->store->connection(), 'del'], $valuesChunk);
+                $this->store->connection()->del(...$valuesChunk);
             }
         }
     }
diff --git a/src/Illuminate/Cache/composer.json b/src/Illuminate/Cache/composer.json
index e69c406246ce..1599d78153f1 100755
--- a/src/Illuminate/Cache/composer.json
+++ b/src/Illuminate/Cache/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
     },
diff --git a/src/Illuminate/Config/composer.json b/src/Illuminate/Config/composer.json
index 55e8a4035ad9..2356cbabb1b2 100755
--- a/src/Illuminate/Config/composer.json
+++ b/src/Illuminate/Config/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
     },
diff --git a/src/Illuminate/Console/Concerns/HasParameters.php b/src/Illuminate/Console/Concerns/HasParameters.php
index 3f6f9c7642cf..e860ec2a2ec5 100644
--- a/src/Illuminate/Console/Concerns/HasParameters.php
+++ b/src/Illuminate/Console/Concerns/HasParameters.php
@@ -21,7 +21,7 @@ protected function specifyParameters()
             if ($arguments instanceof InputArgument) {
                 $this->getDefinition()->addArgument($arguments);
             } else {
-                call_user_func_array([$this, 'addArgument'], $arguments);
+                $this->addArgument(...array_values($arguments));
             }
         }
 
@@ -29,7 +29,7 @@ protected function specifyParameters()
             if ($options instanceof InputOption) {
                 $this->getDefinition()->addOption($options);
             } else {
-                call_user_func_array([$this, 'addOption'], $options);
+                $this->addOption(...array_values($options));
             }
         }
     }
diff --git a/src/Illuminate/Console/composer.json b/src/Illuminate/Console/composer.json
index 55f104571a7f..51a5a71351b9 100755
--- a/src/Illuminate/Console/composer.json
+++ b/src/Illuminate/Console/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0",
         "symfony/console": "^4.3.4",
diff --git a/src/Illuminate/Container/BoundMethod.php b/src/Illuminate/Container/BoundMethod.php
index 8b53f71a331d..0afbd104c3c1 100644
--- a/src/Illuminate/Container/BoundMethod.php
+++ b/src/Illuminate/Container/BoundMethod.php
@@ -28,9 +28,7 @@ public static function call($container, $callback, array $parameters = [], $defa
         }
 
         return static::callBoundMethod($container, $callback, function () use ($container, $callback, $parameters) {
-            return call_user_func_array(
-                $callback, static::getMethodDependencies($container, $callback, $parameters)
-            );
+            return $callback(...static::getMethodDependencies($container, $callback, $parameters));
         });
     }
 
@@ -121,7 +119,7 @@ protected static function getMethodDependencies($container, $callback, array $pa
             static::addDependencyForCallParameter($container, $parameter, $parameters, $dependencies);
         }
 
-        return array_merge($dependencies, $parameters);
+        return array_merge($dependencies, array_values($parameters));
     }
 
     /**
diff --git a/src/Illuminate/Container/composer.json b/src/Illuminate/Container/composer.json
index 76da2163481f..5e78e465fa18 100755
--- a/src/Illuminate/Container/composer.json
+++ b/src/Illuminate/Container/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "psr/container": "^1.0"
     },
diff --git a/src/Illuminate/Contracts/composer.json b/src/Illuminate/Contracts/composer.json
index fee8ed4d078b..d7f41e433a70 100644
--- a/src/Illuminate/Contracts/composer.json
+++ b/src/Illuminate/Contracts/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "psr/container": "^1.0",
         "psr/simple-cache": "^1.0"
     },
diff --git a/src/Illuminate/Cookie/CookieJar.php b/src/Illuminate/Cookie/CookieJar.php
index a880e898eb43..337435a74688 100755
--- a/src/Illuminate/Cookie/CookieJar.php
+++ b/src/Illuminate/Cookie/CookieJar.php
@@ -143,7 +143,7 @@ public function queue(...$parameters)
         if (head($parameters) instanceof Cookie) {
             $cookie = head($parameters);
         } else {
-            $cookie = call_user_func_array([$this, 'make'], $parameters);
+            $cookie = $this->make(...array_values($parameters));
         }
 
         if (! isset($this->queued[$cookie->getName()])) {
diff --git a/src/Illuminate/Cookie/composer.json b/src/Illuminate/Cookie/composer.json
index 1517a2b1938a..bb0a6e247588 100755
--- a/src/Illuminate/Cookie/composer.json
+++ b/src/Illuminate/Cookie/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0",
         "symfony/http-foundation": "^4.3.4",
diff --git a/src/Illuminate/Database/Connection.php b/src/Illuminate/Database/Connection.php
index 7c688fdbe5a2..af5803354957 100755
--- a/src/Illuminate/Database/Connection.php
+++ b/src/Illuminate/Database/Connection.php
@@ -889,7 +889,14 @@ public function getDoctrineColumn($table, $column)
      */
     public function getDoctrineSchemaManager()
     {
-        return $this->getDoctrineDriver()->getSchemaManager($this->getDoctrineConnection());
+        $connection = $this->getDoctrineConnection();
+
+        // v2 expects only one param, and v3 two. We don't need to care about
+        // this, and can always pass them both. In v2, the 2nd is ignored.
+        return $this->getDoctrineDriver()->getSchemaManager(
+            $connection,
+            $connection->getDatabasePlatform()
+        );
     }
 
     /**
@@ -905,7 +912,7 @@ public function getDoctrineConnection()
             $this->doctrineConnection = new DoctrineConnection(array_filter([
                 'pdo' => $this->getPdo(),
                 'dbname' => $this->getDatabaseName(),
-                'driver' => $driver->getName(),
+                'driver' => method_exists($driver, 'getName') ? $driver->getName() : null,
                 'serverVersion' => $this->getConfig('server_version'),
             ]), $driver);
         }
diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 00131c80054f..9c2288fac202 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -1351,14 +1351,16 @@ public function __call($method, $parameters)
         }
 
         if (static::hasGlobalMacro($method)) {
-            if (static::$macros[$method] instanceof Closure) {
-                return call_user_func_array(static::$macros[$method]->bindTo($this, static::class), $parameters);
+            $callable = static::$macros[$method];
+
+            if ($callable instanceof Closure) {
+                $callable = $callable->bindTo($this, static::class);
             }
 
-            return call_user_func_array(static::$macros[$method], $parameters);
+            return $callable(...$parameters);
         }
 
-        if (method_exists($this->model, $scope = 'scope'.ucfirst($method))) {
+        if ($this->model !== null && method_exists($this->model, $scope = 'scope'.ucfirst($method))) {
             return $this->callScope([$this->model, $scope], $parameters);
         }
 
@@ -1396,11 +1398,13 @@ public static function __callStatic($method, $parameters)
             static::throwBadMethodCallException($method);
         }
 
-        if (static::$macros[$method] instanceof Closure) {
-            return call_user_func_array(Closure::bind(static::$macros[$method], null, static::class), $parameters);
+        $callable = static::$macros[$method];
+
+        if ($callable instanceof Closure) {
+            $callable = $callable->bindTo(null, static::class);
         }
 
-        return call_user_func_array(static::$macros[$method], $parameters);
+        return $callable(...$parameters);
     }
 
     /**
diff --git a/src/Illuminate/Database/Eloquent/Collection.php b/src/Illuminate/Database/Eloquent/Collection.php
index c4e8d9f1778c..6705232d9924 100755
--- a/src/Illuminate/Database/Eloquent/Collection.php
+++ b/src/Illuminate/Database/Eloquent/Collection.php
@@ -451,7 +451,7 @@ public function keys()
      */
     public function zip($items)
     {
-        return call_user_func_array([$this->toBase(), 'zip'], func_get_args());
+        return $this->toBase()->zip(...func_get_args());
     }
 
     /**
diff --git a/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php b/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
index 4894103d202a..c6812b75a150 100644
--- a/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
+++ b/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
@@ -537,11 +537,11 @@ public function newPivotQuery()
         $query = $this->newPivotStatement();
 
         foreach ($this->pivotWheres as $arguments) {
-            call_user_func_array([$query, 'where'], $arguments);
+            $query->where(...$arguments);
         }
 
         foreach ($this->pivotWhereIns as $arguments) {
-            call_user_func_array([$query, 'whereIn'], $arguments);
+            $query->whereIn(...$arguments);
         }
 
         return $query->where($this->foreignPivotKey, $this->parent->{$this->parentKey});
diff --git a/src/Illuminate/Database/MigrationServiceProvider.php b/src/Illuminate/Database/MigrationServiceProvider.php
index f9bded758358..efd5f836c866 100755
--- a/src/Illuminate/Database/MigrationServiceProvider.php
+++ b/src/Illuminate/Database/MigrationServiceProvider.php
@@ -102,7 +102,7 @@ protected function registerCreator()
     protected function registerCommands(array $commands)
     {
         foreach (array_keys($commands) as $command) {
-            call_user_func_array([$this, "register{$command}Command"], []);
+            $this->{"register{$command}Command"}();
         }
 
         $this->commands(array_values($commands));
diff --git a/src/Illuminate/Database/MySqlConnection.php b/src/Illuminate/Database/MySqlConnection.php
index 94b5b57d87e0..b53a9091ec0e 100755
--- a/src/Illuminate/Database/MySqlConnection.php
+++ b/src/Illuminate/Database/MySqlConnection.php
@@ -3,6 +3,8 @@
 namespace Illuminate\Database;
 
 use Doctrine\DBAL\Driver\PDOMySql\Driver as DoctrineDriver;
+use Doctrine\DBAL\Version;
+use Illuminate\Database\PDO\MySqlDriver;
 use Illuminate\Database\Query\Grammars\MySqlGrammar as QueryGrammar;
 use Illuminate\Database\Query\Processors\MySqlProcessor;
 use Illuminate\Database\Schema\Grammars\MySqlGrammar as SchemaGrammar;
@@ -57,10 +59,10 @@ protected function getDefaultPostProcessor()
     /**
      * Get the Doctrine DBAL driver.
      *
-     * @return \Doctrine\DBAL\Driver\PDOMySql\Driver
+     * @return \Doctrine\DBAL\Driver\PDOMySql\Driver|\Illuminate\Database\PDO\MySqlDriver
      */
     protected function getDoctrineDriver()
     {
-        return new DoctrineDriver;
+        return class_exists(Version::class) ? new DoctrineDriver : new MySqlDriver;
     }
 }
diff --git a/src/Illuminate/Database/PDO/Connection.php b/src/Illuminate/Database/PDO/Connection.php
new file mode 100644
index 000000000000..c5e7e8fb32a6
--- /dev/null
+++ b/src/Illuminate/Database/PDO/Connection.php
@@ -0,0 +1,117 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\PDO\Exception;
+use Doctrine\DBAL\Driver\PDO\Result;
+use Doctrine\DBAL\Driver\PDO\Statement;
+use Doctrine\DBAL\Driver\Result as ResultInterface;
+use Doctrine\DBAL\Driver\ServerInfoAwareConnection;
+use Doctrine\DBAL\Driver\Statement as StatementInterface;
+use Doctrine\DBAL\ParameterType;
+use PDO;
+use PDOException;
+use PDOStatement;
+
+class Connection implements ServerInfoAwareConnection
+{
+    /**
+     * @var \PDO
+     */
+    private $connection;
+
+    /**
+     * Create a new DPO connection instance.
+     *
+     * @param  \PDO  $connection
+     * @return void
+     */
+    public function __construct(PDO $connection)
+    {
+        $this->connection = $connection;
+    }
+
+    public function exec(string $statement): int
+    {
+        try {
+            $result = $this->connection->exec($statement);
+
+            \assert($result !== false);
+
+            return $result;
+        } catch (PDOException $exception) {
+            throw Exception::new($exception);
+        }
+    }
+
+    public function getServerVersion()
+    {
+        return $this->connection->getAttribute(PDO::ATTR_SERVER_VERSION);
+    }
+
+    public function prepare(string $sql): StatementInterface
+    {
+        try {
+            return $this->createStatement(
+                $this->connection->prepare($sql)
+            );
+        } catch (PDOException $exception) {
+            throw Exception::new($exception);
+        }
+    }
+
+    public function query(string $sql): ResultInterface
+    {
+        try {
+            $stmt = $this->connection->query($sql);
+            \assert($stmt instanceof PDOStatement);
+
+            return new Result($stmt);
+        } catch (PDOException $exception) {
+            throw Exception::new($exception);
+        }
+    }
+
+    public function quote($input, $type = ParameterType::STRING)
+    {
+        return $this->connection->quote($input, $type);
+    }
+
+    public function lastInsertId($name = null)
+    {
+        try {
+            if ($name === null) {
+                return $this->connection->lastInsertId();
+            }
+
+            return $this->connection->lastInsertId($name);
+        } catch (PDOException $exception) {
+            throw Exception::new($exception);
+        }
+    }
+
+    protected function createStatement(PDOStatement $stmt): Statement
+    {
+        return new Statement($stmt);
+    }
+
+    public function beginTransaction()
+    {
+        return $this->connection->beginTransaction();
+    }
+
+    public function commit()
+    {
+        return $this->connection->commit();
+    }
+
+    public function rollBack()
+    {
+        return $this->connection->rollBack();
+    }
+
+    public function getWrappedConnection(): PDO
+    {
+        return $this->connection;
+    }
+}
diff --git a/src/Illuminate/Database/PDO/MySqlDriver.php b/src/Illuminate/Database/PDO/MySqlDriver.php
new file mode 100644
index 000000000000..e568ba2d2f41
--- /dev/null
+++ b/src/Illuminate/Database/PDO/MySqlDriver.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\AbstractMySQLDriver;
+use PDO;
+
+class MySqlDriver extends AbstractMySQLDriver
+{
+    public function connect(array $params)
+    {
+        if (! isset($params['pdo']) || ! $params['pdo'] instanceof PDO) {
+            throw new \InvalidArgumentException('Laravel requires the pdo property to be set and be a PDO instance.');
+        }
+
+        return new Connection($params['pdo']);
+    }
+}
diff --git a/src/Illuminate/Database/PDO/PostgresDriver.php b/src/Illuminate/Database/PDO/PostgresDriver.php
new file mode 100644
index 000000000000..02dd858f458a
--- /dev/null
+++ b/src/Illuminate/Database/PDO/PostgresDriver.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\AbstractPostgreSQLDriver;
+use PDO;
+
+class PostgresDriver extends AbstractPostgreSQLDriver
+{
+    public function connect(array $params)
+    {
+        if (! isset($params['pdo']) || ! $params['pdo'] instanceof PDO) {
+            throw new \InvalidArgumentException('Laravel requires the pdo property to be set and be a PDO instance.');
+        }
+
+        return new Connection($params['pdo']);
+    }
+}
diff --git a/src/Illuminate/Database/PDO/SQLiteDriver.php b/src/Illuminate/Database/PDO/SQLiteDriver.php
new file mode 100644
index 000000000000..06d7d84ee546
--- /dev/null
+++ b/src/Illuminate/Database/PDO/SQLiteDriver.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\AbstractSQLiteDriver;
+use PDO;
+
+class SQLiteDriver extends AbstractSQLiteDriver
+{
+    public function connect(array $params)
+    {
+        if (! isset($params['pdo']) || ! $params['pdo'] instanceof PDO) {
+            throw new \InvalidArgumentException('Laravel requires the pdo property to be set and be a PDO instance.');
+        }
+
+        return new Connection($params['pdo']);
+    }
+}
diff --git a/src/Illuminate/Database/PDO/SqlServerConnection.php b/src/Illuminate/Database/PDO/SqlServerConnection.php
new file mode 100644
index 000000000000..7c99efa530f7
--- /dev/null
+++ b/src/Illuminate/Database/PDO/SqlServerConnection.php
@@ -0,0 +1,94 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\PDO\SQLSrv\Statement;
+use Doctrine\DBAL\Driver\Result;
+use Doctrine\DBAL\Driver\ServerInfoAwareConnection;
+use Doctrine\DBAL\Driver\Statement as StatementInterface;
+use Doctrine\DBAL\ParameterType;
+use PDO;
+
+class SqlServerConnection implements ServerInfoAwareConnection
+{
+    /**
+     * @var \Illuminate\Database\PDO\Connection
+     */
+    private $connection;
+
+    /**
+     * Create a new SQL Server connection instance.
+     *
+     * @param  \Illuminate\Database\PDO\Connection  $connection
+     * @return void
+     */
+    public function __construct(Connection $connection)
+    {
+        $this->connection = $connection;
+    }
+
+    public function prepare(string $sql): StatementInterface
+    {
+        return new Statement(
+            $this->connection->prepare($sql)
+        );
+    }
+
+    public function query(string $sql): Result
+    {
+        return $this->connection->query($sql);
+    }
+
+    public function quote($value, $type = ParameterType::STRING)
+    {
+        $val = $this->connection->quote($value, $type);
+
+        // Fix for a driver version terminating all values with null byte
+        if (\is_string($val) && \strpos($val, "\0") !== false) {
+            $val = \substr($val, 0, -1);
+        }
+
+        return $val;
+    }
+
+    public function exec(string $statement): int
+    {
+        return $this->connection->exec($statement);
+    }
+
+    public function lastInsertId($name = null)
+    {
+        if ($name === null) {
+            return $this->connection->lastInsertId($name);
+        }
+
+        return $this->prepare('SELECT CONVERT(VARCHAR(MAX), current_value) FROM sys.sequences WHERE name = ?')
+            ->execute([$name])
+            ->fetchOne();
+    }
+
+    public function beginTransaction()
+    {
+        return $this->connection->beginTransaction();
+    }
+
+    public function commit()
+    {
+        return $this->connection->commit();
+    }
+
+    public function rollBack()
+    {
+        return $this->connection->rollBack();
+    }
+
+    public function getServerVersion()
+    {
+        return $this->connection->getServerVersion();
+    }
+
+    public function getWrappedConnection(): PDO
+    {
+        return $this->connection->getWrappedConnection();
+    }
+}
diff --git a/src/Illuminate/Database/PDO/SqlServerDriver.php b/src/Illuminate/Database/PDO/SqlServerDriver.php
new file mode 100644
index 000000000000..47bead97bb8d
--- /dev/null
+++ b/src/Illuminate/Database/PDO/SqlServerDriver.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Illuminate\Database\PDO;
+
+use Doctrine\DBAL\Driver\AbstractSQLServerDriver;
+
+class SqlServerDriver extends AbstractSQLServerDriver
+{
+    public function connect(array $params)
+    {
+        return new SqlServerConnection(
+            new Connection($params)
+        );
+    }
+}
diff --git a/src/Illuminate/Database/PostgresConnection.php b/src/Illuminate/Database/PostgresConnection.php
index 5555df1a2e32..9898311b00c7 100755
--- a/src/Illuminate/Database/PostgresConnection.php
+++ b/src/Illuminate/Database/PostgresConnection.php
@@ -3,6 +3,8 @@
 namespace Illuminate\Database;
 
 use Doctrine\DBAL\Driver\PDOPgSql\Driver as DoctrineDriver;
+use Doctrine\DBAL\Version;
+use Illuminate\Database\PDO\PostgresDriver;
 use Illuminate\Database\Query\Grammars\PostgresGrammar as QueryGrammar;
 use Illuminate\Database\Query\Processors\PostgresProcessor;
 use Illuminate\Database\Schema\Grammars\PostgresGrammar as SchemaGrammar;
@@ -57,10 +59,10 @@ protected function getDefaultPostProcessor()
     /**
      * Get the Doctrine DBAL driver.
      *
-     * @return \Doctrine\DBAL\Driver\PDOPgSql\Driver
+     * @return \Doctrine\DBAL\Driver\PDOPgSql\Driver|\Illuminate\Database\PDO\PostgresDriver
      */
     protected function getDoctrineDriver()
     {
-        return new DoctrineDriver;
+        return class_exists(Version::class) ? new DoctrineDriver : new PostgresDriver;
     }
 }
diff --git a/src/Illuminate/Database/SQLiteConnection.php b/src/Illuminate/Database/SQLiteConnection.php
index 4990fdd299a1..39240bf2be79 100755
--- a/src/Illuminate/Database/SQLiteConnection.php
+++ b/src/Illuminate/Database/SQLiteConnection.php
@@ -3,6 +3,8 @@
 namespace Illuminate\Database;
 
 use Doctrine\DBAL\Driver\PDOSqlite\Driver as DoctrineDriver;
+use Doctrine\DBAL\Version;
+use Illuminate\Database\PDO\SQLiteDriver;
 use Illuminate\Database\Query\Grammars\SQLiteGrammar as QueryGrammar;
 use Illuminate\Database\Query\Processors\SQLiteProcessor;
 use Illuminate\Database\Schema\Grammars\SQLiteGrammar as SchemaGrammar;
@@ -81,11 +83,11 @@ protected function getDefaultPostProcessor()
     /**
      * Get the Doctrine DBAL driver.
      *
-     * @return \Doctrine\DBAL\Driver\PDOSqlite\Driver
+     * @return \Doctrine\DBAL\Driver\PDOSqlite\Driver|\Illuminate\Database\PDO\SQLiteDriver
      */
     protected function getDoctrineDriver()
     {
-        return new DoctrineDriver;
+        return class_exists(Version::class) ? new DoctrineDriver : new SQLiteDriver;
     }
 
     /**
diff --git a/src/Illuminate/Database/Schema/Grammars/RenameColumn.php b/src/Illuminate/Database/Schema/Grammars/RenameColumn.php
index 3fe9fd8fbb10..fd54fb28df14 100644
--- a/src/Illuminate/Database/Schema/Grammars/RenameColumn.php
+++ b/src/Illuminate/Database/Schema/Grammars/RenameColumn.php
@@ -61,9 +61,22 @@ protected static function getRenamedDiff(Grammar $grammar, Blueprint $blueprint,
     protected static function setRenamedColumns(TableDiff $tableDiff, Fluent $command, Column $column)
     {
         $tableDiff->renamedColumns = [
-            $command->from => new Column($command->to, $column->getType(), $column->toArray()),
+            $command->from => new Column($command->to, $column->getType(), self::getWritableColumnOptions($column)),
         ];
 
         return $tableDiff;
     }
+
+    /**
+     * Get the writable column options.
+     *
+     * @param  \Doctrine\DBAL\Schema\Column  $column
+     * @return array
+     */
+    private static function getWritableColumnOptions(Column $column)
+    {
+        return array_filter($column->toArray(), function (string $name) use ($column) {
+            return method_exists($column, 'set'.$name);
+        }, ARRAY_FILTER_USE_KEY);
+    }
 }
diff --git a/src/Illuminate/Database/SqlServerConnection.php b/src/Illuminate/Database/SqlServerConnection.php
index 8a642572104f..6bb2f12818af 100755
--- a/src/Illuminate/Database/SqlServerConnection.php
+++ b/src/Illuminate/Database/SqlServerConnection.php
@@ -4,7 +4,9 @@
 
 use Closure;
 use Doctrine\DBAL\Driver\PDOSqlsrv\Driver as DoctrineDriver;
+use Doctrine\DBAL\Version;
 use Exception;
+use Illuminate\Database\PDO\SqlServerDriver;
 use Illuminate\Database\Query\Grammars\SqlServerGrammar as QueryGrammar;
 use Illuminate\Database\Query\Processors\SqlServerProcessor;
 use Illuminate\Database\Schema\Grammars\SqlServerGrammar as SchemaGrammar;
@@ -104,10 +106,10 @@ protected function getDefaultPostProcessor()
     /**
      * Get the Doctrine DBAL driver.
      *
-     * @return \Doctrine\DBAL\Driver\PDOSqlsrv\Driver
+     * @return \Doctrine\DBAL\Driver\PDOSqlsrv\Driver|\Illuminate\Database\PDO\SqlServerDriver
      */
     protected function getDoctrineDriver()
     {
-        return new DoctrineDriver;
+        return class_exists(Version::class) ? new DoctrineDriver : new SqlServerDriver;
     }
 }
diff --git a/src/Illuminate/Database/composer.json b/src/Illuminate/Database/composer.json
index f407ca6c22d3..b6f5c0c7e090 100644
--- a/src/Illuminate/Database/composer.json
+++ b/src/Illuminate/Database/composer.json
@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/container": "^6.0",
         "illuminate/contracts": "^6.0",
@@ -32,7 +32,7 @@
         }
     },
     "suggest": {
-        "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6).",
+        "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6|^3.0).",
         "fzaninotto/faker": "Required to use the eloquent factory builder (^1.9.1).",
         "illuminate/console": "Required to use the database commands (^6.0).",
         "illuminate/events": "Required to use the observers with Eloquent (^6.0).",
diff --git a/src/Illuminate/Encryption/composer.json b/src/Illuminate/Encryption/composer.json
index 5f535b4004b2..5a096a9c7a8e 100644
--- a/src/Illuminate/Encryption/composer.json
+++ b/src/Illuminate/Encryption/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-openssl": "*",
diff --git a/src/Illuminate/Events/CallQueuedListener.php b/src/Illuminate/Events/CallQueuedListener.php
index 5a88df56f8b4..c7fc821de584 100644
--- a/src/Illuminate/Events/CallQueuedListener.php
+++ b/src/Illuminate/Events/CallQueuedListener.php
@@ -89,17 +89,15 @@ public function handle(Container $container)
             $this->job, $container->make($this->class)
         );
 
-        call_user_func_array(
-            [$handler, $this->method], $this->data
-        );
+        $handler->{$this->method}(...array_values($this->data));
     }
 
     /**
      * Set the job instance of the given class if necessary.
      *
      * @param  \Illuminate\Contracts\Queue\Job  $job
-     * @param  mixed  $instance
-     * @return mixed
+     * @param  object  $instance
+     * @return object
      */
     protected function setJobInstanceIfNecessary(Job $job, $instance)
     {
@@ -124,10 +122,10 @@ public function failed($e)
 
         $handler = Container::getInstance()->make($this->class);
 
-        $parameters = array_merge($this->data, [$e]);
+        $parameters = array_merge(array_values($this->data), [$e]);
 
         if (method_exists($handler, 'failed')) {
-            call_user_func_array([$handler, 'failed'], $parameters);
+            $handler->failed(...$parameters);
         }
     }
 
diff --git a/src/Illuminate/Events/Dispatcher.php b/src/Illuminate/Events/Dispatcher.php
index 21dc14ab9e88..0d0173e3cbb9 100755
--- a/src/Illuminate/Events/Dispatcher.php
+++ b/src/Illuminate/Events/Dispatcher.php
@@ -384,9 +384,9 @@ public function createClassListener($listener, $wildcard = false)
                 return call_user_func($this->createClassCallable($listener), $event, $payload);
             }
 
-            return call_user_func_array(
-                $this->createClassCallable($listener), $payload
-            );
+            $callable = $this->createClassCallable($listener);
+
+            return $callable(...array_values($payload));
         };
     }
 
diff --git a/src/Illuminate/Events/composer.json b/src/Illuminate/Events/composer.json
index 639083026959..5b303a5fbff4 100755
--- a/src/Illuminate/Events/composer.json
+++ b/src/Illuminate/Events/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/container": "^6.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
diff --git a/src/Illuminate/Filesystem/FilesystemAdapter.php b/src/Illuminate/Filesystem/FilesystemAdapter.php
index d3d62194b251..e4b917c0d405 100644
--- a/src/Illuminate/Filesystem/FilesystemAdapter.php
+++ b/src/Illuminate/Filesystem/FilesystemAdapter.php
@@ -739,6 +739,6 @@ protected function parseVisibility($visibility)
      */
     public function __call($method, array $parameters)
     {
-        return call_user_func_array([$this->driver, $method], $parameters);
+        return $this->driver->{$method}(...array_values($parameters));
     }
 }
diff --git a/src/Illuminate/Filesystem/composer.json b/src/Illuminate/Filesystem/composer.json
index 010622d88b80..f018147e355f 100644
--- a/src/Illuminate/Filesystem/composer.json
+++ b/src/Illuminate/Filesystem/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0",
         "symfony/finder": "^4.3.4"
@@ -31,7 +31,7 @@
     },
     "suggest": {
         "ext-ftp": "Required to use the Flysystem FTP driver.",
-        "league/flysystem": "Required to use the Flysystem local and FTP drivers (^1.0.34).",
+        "league/flysystem": "Required to use the Flysystem local and FTP drivers (^1.1).",
         "league/flysystem-aws-s3-v3": "Required to use the Flysystem S3 driver (^1.0).",
         "league/flysystem-cached-adapter": "Required to use the Flysystem cache (^1.0).",
         "league/flysystem-sftp": "Required to use the Flysystem SFTP driver (^1.0).",
diff --git a/src/Illuminate/Foundation/Console/QueuedCommand.php b/src/Illuminate/Foundation/Console/QueuedCommand.php
index 67749ee938dd..fb3d027b4b0a 100644
--- a/src/Illuminate/Foundation/Console/QueuedCommand.php
+++ b/src/Illuminate/Foundation/Console/QueuedCommand.php
@@ -37,6 +37,6 @@ public function __construct($data)
      */
     public function handle(KernelContract $kernel)
     {
-        call_user_func_array([$kernel, 'call'], $this->data);
+        $kernel->call(...array_values($this->data));
     }
 }
diff --git a/src/Illuminate/Foundation/Providers/ArtisanServiceProvider.php b/src/Illuminate/Foundation/Providers/ArtisanServiceProvider.php
index 66aeb5121141..7c33b8d5da91 100755
--- a/src/Illuminate/Foundation/Providers/ArtisanServiceProvider.php
+++ b/src/Illuminate/Foundation/Providers/ArtisanServiceProvider.php
@@ -168,7 +168,7 @@ public function register()
     protected function registerCommands(array $commands)
     {
         foreach (array_keys($commands) as $command) {
-            call_user_func_array([$this, "register{$command}Command"], []);
+            $this->{"register{$command}Command"}();
         }
 
         $this->commands(array_values($commands));
diff --git a/src/Illuminate/Hashing/composer.json b/src/Illuminate/Hashing/composer.json
index a728b6f7154b..e3bc6118a435 100755
--- a/src/Illuminate/Hashing/composer.json
+++ b/src/Illuminate/Hashing/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
     },
diff --git a/src/Illuminate/Http/ResponseTrait.php b/src/Illuminate/Http/ResponseTrait.php
index 76744b487fb8..0858b40e2494 100644
--- a/src/Illuminate/Http/ResponseTrait.php
+++ b/src/Illuminate/Http/ResponseTrait.php
@@ -96,7 +96,7 @@ public function withHeaders($headers)
      */
     public function cookie($cookie)
     {
-        return call_user_func_array([$this, 'withCookie'], func_get_args());
+        return $this->withCookie(...func_get_args());
     }
 
     /**
@@ -108,7 +108,7 @@ public function cookie($cookie)
     public function withCookie($cookie)
     {
         if (is_string($cookie) && function_exists('cookie')) {
-            $cookie = call_user_func_array('cookie', func_get_args());
+            $cookie = cookie(...func_get_args());
         }
 
         $this->headers->setCookie($cookie);
diff --git a/src/Illuminate/Http/composer.json b/src/Illuminate/Http/composer.json
index 5c17211e9b95..949dd377060e 100755
--- a/src/Illuminate/Http/composer.json
+++ b/src/Illuminate/Http/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/session": "^6.0",
         "illuminate/support": "^6.0",
diff --git a/src/Illuminate/Log/composer.json b/src/Illuminate/Log/composer.json
index 5b2d0c3299f8..ee3c565a146e 100755
--- a/src/Illuminate/Log/composer.json
+++ b/src/Illuminate/Log/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0",
         "monolog/monolog": "^1.12|^2.0"
diff --git a/src/Illuminate/Mail/composer.json b/src/Illuminate/Mail/composer.json
index 3851f3907f6d..1b22c2bcf4d0 100755
--- a/src/Illuminate/Mail/composer.json
+++ b/src/Illuminate/Mail/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/container": "^6.0",
         "illuminate/contracts": "^6.0",
diff --git a/src/Illuminate/Notifications/composer.json b/src/Illuminate/Notifications/composer.json
index cbe02a736ba2..1250fd575eb2 100644
--- a/src/Illuminate/Notifications/composer.json
+++ b/src/Illuminate/Notifications/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/broadcasting": "^6.0",
         "illuminate/bus": "^6.0",
         "illuminate/container": "^6.0",
diff --git a/src/Illuminate/Pagination/composer.json b/src/Illuminate/Pagination/composer.json
index d54b1d2b9d65..c0438de6f379 100755
--- a/src/Illuminate/Pagination/composer.json
+++ b/src/Illuminate/Pagination/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
diff --git a/src/Illuminate/Pipeline/composer.json b/src/Illuminate/Pipeline/composer.json
index a5c9e57565f8..8b14414172d7 100644
--- a/src/Illuminate/Pipeline/composer.json
+++ b/src/Illuminate/Pipeline/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0",
         "symfony/debug": "^4.3"
diff --git a/src/Illuminate/Queue/composer.json b/src/Illuminate/Queue/composer.json
index a2bc8c461d20..eb10c77aad22 100644
--- a/src/Illuminate/Queue/composer.json
+++ b/src/Illuminate/Queue/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/console": "^6.0",
         "illuminate/container": "^6.0",
diff --git a/src/Illuminate/Redis/Connections/PredisConnection.php b/src/Illuminate/Redis/Connections/PredisConnection.php
index 67a9cc1163a3..bea9c6e47007 100644
--- a/src/Illuminate/Redis/Connections/PredisConnection.php
+++ b/src/Illuminate/Redis/Connections/PredisConnection.php
@@ -43,7 +43,7 @@ public function createSubscription($channels, Closure $callback, $method = 'subs
     {
         $loop = $this->pubSubLoop();
 
-        call_user_func_array([$loop, $method], (array) $channels);
+        $loop->{$method}(...array_values((array) $channels));
 
         foreach ($loop as $message) {
             if ($message->kind === 'message' || $message->kind === 'pmessage') {
diff --git a/src/Illuminate/Redis/composer.json b/src/Illuminate/Redis/composer.json
index 84dfa186bc9b..8261ad60c3df 100755
--- a/src/Illuminate/Redis/composer.json
+++ b/src/Illuminate/Redis/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "illuminate/contracts": "^6.0",
         "illuminate/support": "^6.0"
     },
diff --git a/src/Illuminate/Routing/Controller.php b/src/Illuminate/Routing/Controller.php
index 50de9712294f..a26a5ee7effa 100644
--- a/src/Illuminate/Routing/Controller.php
+++ b/src/Illuminate/Routing/Controller.php
@@ -51,7 +51,7 @@ public function getMiddleware()
      */
     public function callAction($method, $parameters)
     {
-        return call_user_func_array([$this, $method], $parameters);
+        return $this->{$method}(...array_values($parameters));
     }
 
     /**
diff --git a/src/Illuminate/Routing/Pipeline.php b/src/Illuminate/Routing/Pipeline.php
index 63d59ad93a33..3d4a684cf39a 100644
--- a/src/Illuminate/Routing/Pipeline.php
+++ b/src/Illuminate/Routing/Pipeline.php
@@ -50,7 +50,7 @@ protected function handleException($passable, Exception $e)
 
         $response = $handler->render($passable, $e);
 
-        if (method_exists($response, 'withException')) {
+        if (is_object($response) && method_exists($response, 'withException')) {
             $response->withException($e);
         }
 
diff --git a/src/Illuminate/Routing/Route.php b/src/Illuminate/Routing/Route.php
index 2d854ef95964..9b31e619fea9 100755
--- a/src/Illuminate/Routing/Route.php
+++ b/src/Illuminate/Routing/Route.php
@@ -790,9 +790,9 @@ public function gatherMiddleware()
 
         $this->computedMiddleware = [];
 
-        return $this->computedMiddleware = array_unique(array_merge(
+        return $this->computedMiddleware = Router::uniqueMiddleware(array_merge(
             $this->middleware(), $this->controllerMiddleware()
-        ), SORT_REGULAR);
+        ));
     }
 
     /**
diff --git a/src/Illuminate/Routing/Router.php b/src/Illuminate/Routing/Router.php
index e7f0b58a4a43..8e762351ee8f 100644
--- a/src/Illuminate/Routing/Router.php
+++ b/src/Illuminate/Routing/Router.php
@@ -1273,6 +1273,29 @@ public function setRoutes(RouteCollection $routes)
         $this->container->instance('routes', $this->routes);
     }
 
+    /**
+     * Remove any duplicate middleware from the given array.
+     *
+     * @param  array  $middleware
+     * @return array
+     */
+    public static function uniqueMiddleware(array $middleware)
+    {
+        $seen = [];
+        $result = [];
+
+        foreach ($middleware as $value) {
+            $key = \is_object($value) ? \spl_object_id($value) : $value;
+
+            if (! isset($seen[$key])) {
+                $seen[$key] = true;
+                $result[] = $value;
+            }
+        }
+
+        return $result;
+    }
+
     /**
      * Dynamically handle calls into the router instance.
      *
diff --git a/src/Illuminate/Routing/SortedMiddleware.php b/src/Illuminate/Routing/SortedMiddleware.php
index f384603387f8..57dbb0730a38 100644
--- a/src/Illuminate/Routing/SortedMiddleware.php
+++ b/src/Illuminate/Routing/SortedMiddleware.php
@@ -62,7 +62,7 @@ protected function sortMiddleware($priorityMap, $middlewares)
             }
         }
 
-        return array_values(array_unique($middlewares, SORT_REGULAR));
+        return Router::uniqueMiddleware($middlewares);
     }
 
     /**
diff --git a/src/Illuminate/Routing/composer.json b/src/Illuminate/Routing/composer.json
index 9bc8e5f46f22..6362308f42df 100644
--- a/src/Illuminate/Routing/composer.json
+++ b/src/Illuminate/Routing/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/container": "^6.0",
         "illuminate/contracts": "^6.0",
diff --git a/src/Illuminate/Session/composer.json b/src/Illuminate/Session/composer.json
index 3c9962cde646..132304c2d30b 100755
--- a/src/Illuminate/Session/composer.json
+++ b/src/Illuminate/Session/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/contracts": "^6.0",
         "illuminate/filesystem": "^6.0",
diff --git a/src/Illuminate/Support/Collection.php b/src/Illuminate/Support/Collection.php
index 91102f6862d2..b9d4ebb7d82b 100644
--- a/src/Illuminate/Support/Collection.php
+++ b/src/Illuminate/Support/Collection.php
@@ -1210,7 +1210,7 @@ public function zip($items)
             return new static(func_get_args());
         }, $this->items], $arrayableItems);
 
-        return new static(call_user_func_array('array_map', $params));
+        return new static(array_map(...$params));
     }
 
     /**
diff --git a/src/Illuminate/Support/Str.php b/src/Illuminate/Support/Str.php
index 8ff6d4cacfdd..3497e851caf0 100644
--- a/src/Illuminate/Support/Str.php
+++ b/src/Illuminate/Support/Str.php
@@ -455,6 +455,10 @@ public static function replaceFirst($search, $replace, $subject)
      */
     public static function replaceLast($search, $replace, $subject)
     {
+        if ($search === '') {
+            return $subject;
+        }
+
         $position = strrpos($subject, $search);
 
         if ($position !== false) {
diff --git a/src/Illuminate/Support/Traits/EnumeratesValues.php b/src/Illuminate/Support/Traits/EnumeratesValues.php
index a32b51803bc3..f7e9bfc60a63 100644
--- a/src/Illuminate/Support/Traits/EnumeratesValues.php
+++ b/src/Illuminate/Support/Traits/EnumeratesValues.php
@@ -143,7 +143,7 @@ public function containsStrict($key, $value = null)
      */
     public function dd(...$args)
     {
-        call_user_func_array([$this, 'dump'], $args);
+        $this->dump(...$args);
 
         exit(1);
     }
diff --git a/src/Illuminate/Support/Traits/Macroable.php b/src/Illuminate/Support/Traits/Macroable.php
index 0c2112c7fba5..406f65edc79b 100644
--- a/src/Illuminate/Support/Traits/Macroable.php
+++ b/src/Illuminate/Support/Traits/Macroable.php
@@ -82,7 +82,7 @@ public static function __callStatic($method, $parameters)
         $macro = static::$macros[$method];
 
         if ($macro instanceof Closure) {
-            return call_user_func_array(Closure::bind($macro, null, static::class), $parameters);
+            $macro = $macro->bindTo(null, static::class);
         }
 
         return $macro(...$parameters);
@@ -108,7 +108,7 @@ public function __call($method, $parameters)
         $macro = static::$macros[$method];
 
         if ($macro instanceof Closure) {
-            return call_user_func_array($macro->bindTo($this, static::class), $parameters);
+            $macro = $macro->bindTo($this, static::class);
         }
 
         return $macro(...$parameters);
diff --git a/src/Illuminate/Support/composer.json b/src/Illuminate/Support/composer.json
index 828c6e7f95b3..a9956f5f8272 100644
--- a/src/Illuminate/Support/composer.json
+++ b/src/Illuminate/Support/composer.json
@@ -14,12 +14,12 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "ext-mbstring": "*",
         "doctrine/inflector": "^1.4|^2.0",
         "illuminate/contracts": "^6.0",
-        "nesbot/carbon": "^2.0"
+        "nesbot/carbon": "^2.31"
     },
     "conflict": {
         "tightenco/collect": "<5.5.33"
diff --git a/src/Illuminate/Support/helpers.php b/src/Illuminate/Support/helpers.php
index d968dba5466d..17ec26b4ca89 100755
--- a/src/Illuminate/Support/helpers.php
+++ b/src/Illuminate/Support/helpers.php
@@ -385,7 +385,7 @@ function retry($times, callable $callback, $sleep = 0, $when = null)
     {
         $attempts = 0;
 
-        beginning:
+        beginning :
         $attempts++;
         $times--;
 
diff --git a/src/Illuminate/Translation/composer.json b/src/Illuminate/Translation/composer.json
index 25d2fd7fbd8a..a6ee58b3aacf 100755
--- a/src/Illuminate/Translation/composer.json
+++ b/src/Illuminate/Translation/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/contracts": "^6.0",
         "illuminate/filesystem": "^6.0",
diff --git a/src/Illuminate/Validation/Concerns/FormatsMessages.php b/src/Illuminate/Validation/Concerns/FormatsMessages.php
index 8ee3f0aee3bd..9d011892aaf7 100644
--- a/src/Illuminate/Validation/Concerns/FormatsMessages.php
+++ b/src/Illuminate/Validation/Concerns/FormatsMessages.php
@@ -374,7 +374,7 @@ protected function callReplacer($message, $attribute, $rule, $parameters, $valid
         $callback = $this->replacers[$rule];
 
         if ($callback instanceof Closure) {
-            return call_user_func_array($callback, func_get_args());
+            return $callback(...func_get_args());
         } elseif (is_string($callback)) {
             return $this->callClassBasedReplacer($callback, $message, $attribute, $rule, $parameters, $validator);
         }
@@ -395,6 +395,6 @@ protected function callClassBasedReplacer($callback, $message, $attribute, $rule
     {
         [$class, $method] = Str::parseCallback($callback, 'replace');
 
-        return call_user_func_array([$this->container->make($class), $method], array_slice(func_get_args(), 1));
+        return $this->container->make($class)->{$method}(...array_slice(func_get_args(), 1));
     }
 }
diff --git a/src/Illuminate/Validation/Validator.php b/src/Illuminate/Validation/Validator.php
index df06c5077dbf..582075e7cba5 100755
--- a/src/Illuminate/Validation/Validator.php
+++ b/src/Illuminate/Validation/Validator.php
@@ -280,7 +280,7 @@ public function parseData(array $data)
     public function after($callback)
     {
         $this->after[] = function () use ($callback) {
-            return call_user_func_array($callback, [$this]);
+            return $callback($this);
         };
 
         return $this;
@@ -1268,7 +1268,7 @@ protected function callExtension($rule, $parameters)
         $callback = $this->extensions[$rule];
 
         if (is_callable($callback)) {
-            return call_user_func_array($callback, $parameters);
+            return $callback(...array_values($parameters));
         } elseif (is_string($callback)) {
             return $this->callClassBasedExtension($callback, $parameters);
         }
@@ -1285,7 +1285,7 @@ protected function callClassBasedExtension($callback, $parameters)
     {
         [$class, $method] = Str::parseCallback($callback, 'validate');
 
-        return call_user_func_array([$this->container->make($class), $method], $parameters);
+        return $this->container->make($class)->{$method}(...array_values($parameters));
     }
 
     /**
diff --git a/src/Illuminate/Validation/composer.json b/src/Illuminate/Validation/composer.json
index e7475a2b5ea7..7b0f9827db70 100755
--- a/src/Illuminate/Validation/composer.json
+++ b/src/Illuminate/Validation/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "egulias/email-validator": "^2.1.10",
         "illuminate/container": "^6.0",
diff --git a/src/Illuminate/View/Concerns/ManagesEvents.php b/src/Illuminate/View/Concerns/ManagesEvents.php
index 1889a6b6fdaa..39902905de09 100644
--- a/src/Illuminate/View/Concerns/ManagesEvents.php
+++ b/src/Illuminate/View/Concerns/ManagesEvents.php
@@ -121,9 +121,7 @@ protected function buildClassEventCallback($class, $prefix)
         // the instance out of the IoC container and call the method on it with the
         // given arguments that are passed to the Closure as the composer's data.
         return function () use ($class, $method) {
-            return call_user_func_array(
-                [$this->container->make($class), $method], func_get_args()
-            );
+            return $this->container->make($class)->{$method}(...func_get_args());
         };
     }
 
diff --git a/src/Illuminate/View/composer.json b/src/Illuminate/View/composer.json
index e170e507d129..a08e34f11e05 100644
--- a/src/Illuminate/View/composer.json
+++ b/src/Illuminate/View/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "ext-json": "*",
         "illuminate/container": "^6.0",
         "illuminate/contracts": "^6.0",
diff --git a/tests/Container/ContainerCallTest.php b/tests/Container/ContainerCallTest.php
index fe8d6b96c1e8..bd5a4ca826dd 100644
--- a/tests/Container/ContainerCallTest.php
+++ b/tests/Container/ContainerCallTest.php
@@ -3,17 +3,17 @@
 namespace Illuminate\Tests\Container;
 
 use Closure;
+use Error;
 use Illuminate\Container\Container;
 use PHPUnit\Framework\TestCase;
-use ReflectionException;
 use stdClass;
 
 class ContainerCallTest extends TestCase
 {
     public function testCallWithAtSignBasedClassReferencesWithoutMethodThrowsException()
     {
-        $this->expectException(ReflectionException::class);
-        $this->expectExceptionMessage('Function ContainerTestCallStub() does not exist');
+        $this->expectException(Error::class);
+        $this->expectExceptionMessage('Call to undefined function ContainerTestCallStub()');
 
         $container = new Container;
         $container->call('ContainerTestCallStub');
diff --git a/tests/Database/DatabaseConnectionTest.php b/tests/Database/DatabaseConnectionTest.php
index ae9ab5007961..baf3b382ac54 100755
--- a/tests/Database/DatabaseConnectionTest.php
+++ b/tests/Database/DatabaseConnectionTest.php
@@ -178,6 +178,7 @@ public function testBeginTransactionMethodNeverRetriesIfWithinTransaction()
         $pdo->expects($this->once())->method('exec')->will($this->throwException(new Exception));
         $connection = $this->getMockConnection(['reconnect'], $pdo);
         $queryGrammar = $this->createMock(Grammar::class);
+        $queryGrammar->expects($this->once())->method('compileSavepoint')->willReturn('trans1');
         $queryGrammar->expects($this->once())->method('supportsSavepoints')->willReturn(true);
         $connection->setQueryGrammar($queryGrammar);
         $connection->expects($this->never())->method('reconnect');
diff --git a/tests/Database/DatabaseEloquentBelongsToTest.php b/tests/Database/DatabaseEloquentBelongsToTest.php
index d362e4680307..06b2087ff395 100755
--- a/tests/Database/DatabaseEloquentBelongsToTest.php
+++ b/tests/Database/DatabaseEloquentBelongsToTest.php
@@ -77,10 +77,16 @@ public function testEagerConstraintsAreProperlyAdded()
 
     public function testIdsInEagerConstraintsCanBeZero()
     {
+        $keys = ['foreign.value', 0];
+
+        if (version_compare(PHP_VERSION, '8.0.0-dev', '>=')) {
+            sort($keys);
+        }
+
         $relation = $this->getRelation();
         $relation->getRelated()->shouldReceive('getKeyName')->andReturn('id');
         $relation->getRelated()->shouldReceive('getKeyType')->andReturn('int');
-        $relation->getQuery()->shouldReceive('whereIntegerInRaw')->once()->with('relation.id', ['foreign.value', 0]);
+        $relation->getQuery()->shouldReceive('whereIntegerInRaw')->once()->with('relation.id', $keys);
         $models = [new EloquentBelongsToModelStub, new EloquentBelongsToModelStubWithZeroId];
         $relation->addEagerConstraints($models);
     }
diff --git a/tests/Database/DatabaseEloquentBuilderTest.php b/tests/Database/DatabaseEloquentBuilderTest.php
index 8276ea03e96b..29742f5bc60b 100755
--- a/tests/Database/DatabaseEloquentBuilderTest.php
+++ b/tests/Database/DatabaseEloquentBuilderTest.php
@@ -443,7 +443,9 @@ public function testGlobalMacrosAreCalledOnBuilder()
             return $bar;
         });
 
-        Builder::macro('bam', [Builder::class, 'getQuery']);
+        Builder::macro('bam', function () {
+            return $this->getQuery();
+        });
 
         $builder = $this->getBuilder();
 
diff --git a/tests/Integration/Auth/ApiAuthenticationWithEloquentTest.php b/tests/Integration/Auth/ApiAuthenticationWithEloquentTest.php
index 9966fbea6d5d..cf6c6cc5246f 100644
--- a/tests/Integration/Auth/ApiAuthenticationWithEloquentTest.php
+++ b/tests/Integration/Auth/ApiAuthenticationWithEloquentTest.php
@@ -8,6 +8,9 @@
 use Illuminate\Support\Str;
 use Orchestra\Testbench\TestCase;
 
+/**
+ * @requires extension pdo_mysql
+ */
 class ApiAuthenticationWithEloquentTest extends TestCase
 {
     protected function getEnvironmentSetUp($app)
diff --git a/tests/Integration/Database/DatabaseEmulatePreparesMySqlConnectionTest.php b/tests/Integration/Database/DatabaseEmulatePreparesMySqlConnectionTest.php
index 65e71ebdb908..bd71a5865c29 100755
--- a/tests/Integration/Database/DatabaseEmulatePreparesMySqlConnectionTest.php
+++ b/tests/Integration/Database/DatabaseEmulatePreparesMySqlConnectionTest.php
@@ -4,6 +4,9 @@
 
 use PDO;
 
+/**
+ * @requires extension pdo_mysql
+ */
 class DatabaseEmulatePreparesMySqlConnectionTest extends DatabaseMySqlConnectionTest
 {
     protected function getEnvironmentSetUp($app)
diff --git a/tests/Integration/Database/DatabaseMySqlConnectionTest.php b/tests/Integration/Database/DatabaseMySqlConnectionTest.php
index d0ce732573e1..0ca3d3f69a0f 100644
--- a/tests/Integration/Database/DatabaseMySqlConnectionTest.php
+++ b/tests/Integration/Database/DatabaseMySqlConnectionTest.php
@@ -7,6 +7,9 @@
 use Illuminate\Support\Facades\Schema;
 use Orchestra\Testbench\TestCase;
 
+/**
+ * @requires extension pdo_mysql
+ */
 class DatabaseMySqlConnectionTest extends TestCase
 {
     const TABLE = 'player';