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run code in 300+ PHP versions simultaneously
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Output for 8.1.0 - 8.1.32, 8.2.7 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
array(1) { [0]=> array(1) { [0]=> string(3) "123" } } array(1) { [0]=> array(2) { [0]=> string(3) "123" [1]=> string(9) "123" } }

preferences:
87.86 ms | 411 KiB | 5 Q