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@ 2014-09-22T07:20:37Z

<?php

$z = 'b';
$a = [ 'a', $z, 'c' ];
foreach(z($a) as &$x) {
    $x .= 'q';
}
print_r($a);

function z($a)
{
    return $a;
}

Output
Performance
VLD
References
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print_r: documentation ( source)

preferences:dark modelive preview

59.73 ms | 402 KiB | 5 Q