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run code in 200+ php & hhvm versions
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<?php $destfile = "/data/editor/vuln/../../dbconfig.php"; if(preg_match('/\/data\/editor\/[A-Za-z0-9_]{1,20}\//', $destfile)) var_dump("@unlink($destfile);"); ?>
based on TmoTV
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
string(46) "@unlink(/data/editor/vuln/../../dbconfig.php);"