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<?php function calc_string($string) { $calc = create_function("", "return (" . preg_replace('[^0-9\+-\*\/\(\) ]', '', trim($string)) . ");" ); return $calc(); } echo calc_string("6 * ((26 / (2-2)) + -3) - 20");
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function create_function() in /in/p6Onv:4 Stack trace: #0 /in/p6Onv(8): calc_string('6 * ((26 / (2-2...') #1 {main} thrown in /in/p6Onv on line 4
Process exited with code 255.

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