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<?php $input_array = [['a', 'b', 'c'], ['d', 'e', 'f']]; array_walk(&$input_array, function($element) { return join(',',$element); }); var_dump($input_array);
Output for 5.4.0 - 5.4.32
Fatal error: Call-time pass-by-reference has been removed in /in/bB4VJ 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, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/bB4VJ on line 2
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 '[' in /in/bB4VJ on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/bB4VJ on line 2
Process exited with code 255.
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216.11 ms | 1394 KiB | 123 Q