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run code in 300+ PHP versions simultaneously
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Output for 8.0.1 - 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] => NETR5_2 [1] => R6,1 [2] => R5,2 ) [1] => Array ( [0] => NETR1_2 [1] => R4,2 [2] => R3,1 [3] => R3,2 [4] => R2,1 [5] => R2,2 [6] => R1,1 [7] => R1,2 ) )

preferences:
88.25 ms | 412 KiB | 5 Q