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<?php $array = array ('backtrace', 'print'); array_walk($array, 'walk_callback', str_repeat("\0",31337)); function walk_callback($value, $key, $userdata) { if ($value == 'print') { print($userdata); exit("\n\n"); } elseif ($value == 'backtrace') { debug_backtrace(); if ($userdata !== str_repeat("\0",1337*1337)) { die("won't get here, \$userdata is still clean until we return"); } } }
Output for git.master, git.master_jit, rfc.property-hooks
won't get here, $userdata is still clean until we return

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