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<?php class Test { protected $quadrat; function malzwei($n) { return $n * 2; } function quadrat($n) { return $n * $n; } function getQuadrat() { return $this->quadrat; } } $t = new Test(); echo call_user_func($t->getQuadrat(), 3); var_dump(array_map($t->getQuadrat(), array(1, 2, 3, 4)));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, no array or string given in /in/WU9Te:10 Stack trace: #0 {main} thrown in /in/WU9Te on line 10
Process exited with code 255.

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