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<?php $values = [1, 2, 3, 4, 5, 6]; $result = 0; reset($values); while (key($values) !== null) { $result += current($values) - next($values); next($values); } var_dump($result); var_dump(array_sum(array_column(array_chunk($values, 2), 0)) - array_sum(array_column(array_chunk($values, 2), 1))); var_dump( array_reduce(array_chunk($values, 2), function ($result, $item) { return $result + current($item) - next($item); }));
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(-3) int(-3) int(-3)
Output for 5.4.0 - 5.4.45
int(-3) Fatal error: Call to undefined function array_column() in /in/7kbUV on line 16
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/7kbUV 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 '[' in /in/7kbUV on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7kbUV on line 3
Process exited with code 255.
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190.55 ms | 401 KiB | 311 Q