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<?php $arr = array('a', 'b', 'c', 'd', 'e', 'f'); $str = implode(array_walk(function(&$v,$k){if($k%3==0)$v.=';';}, array_reverse($arr))); echo $str;
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: array_walk(): Argument #1 ($array) could not be passed by reference in /in/0Ra0m:3 Stack trace: #0 {main} thrown in /in/0Ra0m on line 3
Process exited with code 255.
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18
Fatal error: Uncaught Error: array_walk(): Argument #1 ($array) cannot be passed by reference in /in/0Ra0m:3 Stack trace: #0 {main} thrown in /in/0Ra0m on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.32
Fatal error: Only variables can be passed by reference in /in/0Ra0m on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/0Ra0m on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/0Ra0m on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/0Ra0m on line 3
Process exited with code 255.
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