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<?php function dangerous() { echo 'Dangerous code executed'; } $arg = '42{${dangerous()}}'; preg_replace("/([0-9]+)(.+)/e",'list($var, $var2) = array("$1", "$2")', $arg); var_dump($var, $var2);
Output for git.master_jit, git.master, rfc.property-hooks
Warning: preg_replace(): Unknown modifier 'e' in /in/oIT0U on line 9 Warning: Undefined variable $var in /in/oIT0U on line 10 Warning: Undefined variable $var2 in /in/oIT0U on line 10 NULL NULL

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