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<?php $arr1=array('a'=>'A','b'=>'B','c'=>'C'); $arr2=array('d'=>'D','E'=>'E','c'=>'C'); $res = array_diff($arr1, $arr2); print_f($res);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function print_f() in /in/UDoqk:8 Stack trace: #0 {main} thrown in /in/UDoqk on line 8
Process exited with code 255.

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