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@ 2013-03-19T18:45:39Z

<?php

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

$a = array(1);

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

Output
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var_dump: documentation ( source)

preferences:dark modelive preview

45.27 ms | 402 KiB | 5 Q