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<?php $arr = array('a', 'b', 'c', 'd', 'e', 'f'); $str = implode(array_walk(array_reverse($arr), function($v,&$k){if($k%3==0)$v.=';';})); echo $str;
Output for git.master, git.master_jit, rfc.property-hooks
Notice: Only variables should be passed by reference in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Warning: {closure}(): Argument #2 ($k) must be passed by reference, value given in /in/VVLNj on line 3 Fatal error: Uncaught TypeError: implode(): Argument #1 ($pieces) must be of type array, string given in /in/VVLNj:3 Stack trace: #0 /in/VVLNj(3): implode('1') #1 {main} thrown in /in/VVLNj on line 3
Process exited with code 255.

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