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array-unpacking.php
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array-unpacking.php
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<?php
namespace ArrayUnpacking;
$foo = ['foo' => 'bar', 1, 2, 3];
$bar = [...$foo];
/** @param array<int, string> $bar */
function intKeyedArray(array $bar)
{
$baz = [...$bar];
}
/** @param array<string, string> $bar */
function stringKeyedArray(array $bar)
{
$baz = [...$bar];
}
/** @param array<array-key, string> $bar */
function unionKeyedArray(array $bar)
{
$baz = [...$bar];
}
function mixedKeyedArray(array $bar)
{
$baz = [...$bar];
}
/**
* @param array<mixed, string> $foo
* @param array<int, string> $bar
*/
function multipleUnpacking(array $foo, array $bar)
{
$baz = [
...$bar,
...$foo,
];
}
/**
* @param array<mixed, string> $foo
* @param array<string, string> $bar
*/
function foo(array $foo, array $bar)
{
$baz = [
$bar,
...$foo
];
}
/**
* @param array{foo: string, bar:int} $foo
* @param array{1, 2, 3, 4} $bar
*/
function unpackingArrayShapes(array $foo, array $bar)
{
$baz = [
...$foo,
...$bar,
];
}