Unpack Array With String Keys

In PHP 7.4, the ellipsis operator was introduced to unpack arrays. Initially, it only supported integer keys, and not string keys. This was introduced in PHP 8.0.

PHP code

<?php

$array = ['a' => 1];

foo(...$array);

function foo($a) {
     echo $a;
}

?>

Before

PHP Fatal error:  Uncaught Error: Cannot unpack array with string keys

Fatal error: Uncaught Error: Cannot unpack array with string keys

After

1

PHP version change

This behavior changed in 8.0

Error Messages

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