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<?php $array = array(1,2,3,4,5); class helper { public static function call($a) { print_r($a); } } $helper = new helper(); array_walk($array, helper::call);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant helper::call in /in/PG69B:12 Stack trace: #0 {main} thrown in /in/PG69B on line 12
Process exited with code 255.

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