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@ 2013-07-28T11:55:33Z

<?php

$a = 'foo';
$b = & $a;

function evilExtractor(array $data)
{
    foreach ($data as $key => & $value) {
        if (is_string($value)) {
            $value .= ' - modified';
        }
    }
}

evilExtractor(get_defined_vars());

var_dump($a, $b);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
get_defined_vars: documentation ( source)

preferences:dark modelive preview

46.72 ms | 402 KiB | 5 Q