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<?php $array = [ 0 => [ 0 => [1,2,3], // +1 1 => [4,5] // +1 ], 1 => [ 0 => [6,7], // +1 1 => [8,9,10] // +1 ] ]; function monkeys($array, &$count) { foreach ($array as $sub) { if (! is_array($sub)) { return ++$count; } else { return monkeys($sub, $count); } } } var_dump(monkeys($array,0));
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: monkeys(): Argument #2 ($count) could not be passed by reference in /in/6Q1KR:23 Stack trace: #0 {main} thrown in /in/6Q1KR on line 23
Process exited with code 255.
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18
Fatal error: Uncaught Error: monkeys(): Argument #2 ($count) cannot be passed by reference in /in/6Q1KR:23 Stack trace: #0 {main} thrown in /in/6Q1KR on line 23
Process exited with code 255.
Output for 5.4.0 - 5.4.32
Fatal error: Only variables can be passed by reference in /in/6Q1KR on line 23
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/6Q1KR 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/6Q1KR on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/6Q1KR on line 2
Process exited with code 255.
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