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<?php $a = array(1, 2, 3, 4, 5); $b = array_keys($c = function($i) { return $a[$i]*2 }); var_dump($b);
Output for 5.3.0 - 5.4.16
Parse error: syntax error, unexpected '}' in /in/dcRIq on line 5
Process exited with code 255.