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<?php class mc { public function go(array $arr) { array_walk($arr, array($this, "walkIt")); } private function walkIt($val) { echo $val . "<br />"; } public function export() { return array($this, 'walkIt'); } } $data = array(1,2,3,4); $m = new mc; $m->go($data); array_walk($data, $m->export());
Output for git.master, git.master_jit, rfc.property-hooks
1<br />2<br />3<br />4<br /> Fatal error: Uncaught TypeError: array_walk(): Argument #2 ($callback) must be a valid callback, cannot access private method mc::walkIt() in /in/tfh7f:22 Stack trace: #0 /in/tfh7f(22): array_walk(Array, Array) #1 {main} thrown in /in/tfh7f on line 22
Process exited with code 255.

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