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@ 2013-03-21T06:52:09Z

<?php

function foo(array &$foo) {
    $foo[] = 2;
}

$a = array(1);

call_user_func('foo', array(&$a));
var_dump($a);

Output
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var_dump: documentation ( source)

preferences:dark modelive preview

33.24 ms | 402 KiB | 5 Q