diff --git a/src/Composer/Package/Archiver/PharArchiver.php b/src/Composer/Package/Archiver/PharArchiver.php
index f9a392353e8c..955d1b3c93e9 100644
--- a/src/Composer/Package/Archiver/PharArchiver.php
+++ b/src/Composer/Package/Archiver/PharArchiver.php
@@ -52,7 +52,12 @@ public function archive($sources, $target, $format, array $excludes = array(), $
                 $target = $filename . '.tar';
             }
 
-            $phar = new \PharData($target, null, null, static::$formats[$format]);
+            $phar = new \PharData(
+                $target,
+                \FilesystemIterator::KEY_AS_PATHNAME | \FilesystemIterator::CURRENT_AS_FILEINFO,
+                '',
+                static::$formats[$format]
+            );
             $files = new ArchivableFilesFinder($sources, $excludes, $ignoreFilters);
             $filesOnly = new ArchivableFilesFilter($files);
             $phar->buildFromIterator($filesOnly, $sources);
diff --git a/src/Composer/Repository/Vcs/BitbucketDriver.php b/src/Composer/Repository/Vcs/BitbucketDriver.php
index e1c45acdef10..1a9a8f6d8bb9 100644
--- a/src/Composer/Repository/Vcs/BitbucketDriver.php
+++ b/src/Composer/Repository/Vcs/BitbucketDriver.php
@@ -86,7 +86,7 @@ protected function getRepoData()
             $this->repository,
             http_build_query(
                 array('fields' => '-project,-owner'),
-                null,
+                '',
                 '&'
             )
         );
@@ -286,7 +286,7 @@ public function getTags()
                         'fields' => 'values.name,values.target.hash,next',
                         'sort' => '-target.date',
                     ),
-                    null,
+                    '',
                     '&'
                 )
             );
@@ -330,7 +330,7 @@ public function getBranches()
                         'fields' => 'values.name,values.target.hash,values.heads,next',
                         'sort' => '-target.date',
                     ),
-                    null,
+                    '',
                     '&'
                 )
             );
diff --git a/src/Composer/Util/GitLab.php b/src/Composer/Util/GitLab.php
index 1ff2fbb96e61..1345eaff3844 100644
--- a/src/Composer/Util/GitLab.php
+++ b/src/Composer/Util/GitLab.php
@@ -172,7 +172,7 @@ private function createToken($scheme, $originUrl)
             'username' => $username,
             'password' => $password,
             'grant_type' => 'password',
-        ), null, '&');
+        ), '', '&');
         $options = array(
             'retry-auth-failure' => false,
             'http' => array(
diff --git a/src/Composer/Util/NoProxyPattern.php b/src/Composer/Util/NoProxyPattern.php
index c391a7535cd5..b8175f3c96e8 100644
--- a/src/Composer/Util/NoProxyPattern.php
+++ b/src/Composer/Util/NoProxyPattern.php
@@ -39,7 +39,7 @@ class NoProxyPattern
      */
     public function __construct($pattern)
     {
-        $this->hostNames = preg_split('{[\s,]+}', $pattern, null, PREG_SPLIT_NO_EMPTY);
+        $this->hostNames = preg_split('{[\s,]+}', $pattern, -1, PREG_SPLIT_NO_EMPTY);
         $this->noproxy = empty($this->hostNames) || '*' === $this->hostNames[0];
     }
 
diff --git a/tests/Composer/Test/AllFunctionalTest.php b/tests/Composer/Test/AllFunctionalTest.php
index 86e03f9e83bf..1cbf16ecc584 100644
--- a/tests/Composer/Test/AllFunctionalTest.php
+++ b/tests/Composer/Test/AllFunctionalTest.php
@@ -181,7 +181,7 @@ public function getTestFiles()
 
     private function parseTestFile($file)
     {
-        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file), null, PREG_SPLIT_DELIM_CAPTURE);
+        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file), -1, PREG_SPLIT_DELIM_CAPTURE);
         $data = array();
         $section = null;
 
diff --git a/tests/Composer/Test/DependencyResolver/PoolBuilderTest.php b/tests/Composer/Test/DependencyResolver/PoolBuilderTest.php
index 88ea4c029e2a..afa39e532b96 100644
--- a/tests/Composer/Test/DependencyResolver/PoolBuilderTest.php
+++ b/tests/Composer/Test/DependencyResolver/PoolBuilderTest.php
@@ -175,7 +175,7 @@ public function getIntegrationTests()
 
     protected function readTestFile(\SplFileInfo $file, $fixturesDir)
     {
-        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file->getRealPath()), null, PREG_SPLIT_DELIM_CAPTURE);
+        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file->getRealPath()), -1, PREG_SPLIT_DELIM_CAPTURE);
 
         $sectionInfo = array(
             'TEST' => true,
diff --git a/tests/Composer/Test/InstallerTest.php b/tests/Composer/Test/InstallerTest.php
index 3732941f0dfe..8be80420683e 100644
--- a/tests/Composer/Test/InstallerTest.php
+++ b/tests/Composer/Test/InstallerTest.php
@@ -484,7 +484,7 @@ public function loadIntegrationTests($path)
 
     protected function readTestFile(\SplFileInfo $file, $fixturesDir)
     {
-        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file->getRealPath()), null, PREG_SPLIT_DELIM_CAPTURE);
+        $tokens = preg_split('#(?:^|\n*)--([A-Z-]+)--\n#', file_get_contents($file->getRealPath()), -1, PREG_SPLIT_DELIM_CAPTURE);
 
         $sectionInfo = array(
             'TEST' => true,