3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.6
array ( 0 => array ( 0 => 1, 1 => 5, 2 => 9, ), 1 => array ( 0 => 2, 1 => 6, 2 => 10, ), 2 => array ( 0 => 3, 1 => 7, 2 => 11, ), 3 => array ( 0 => 4, 1 => 8, 2 => 12, ), )
preferences:
232.38 ms | 412 KiB | 5 Q