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run code in 300+ PHP versions simultaneously
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Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 - 8.4.5
array(2) { ["insert"]=> int(0) ["delete"]=> int(0) } string(23) "{"insert":0,"delete":0}" string(31) "eyJpbnNlcnQiOjAsImRlbGV0ZSI6MH0" string(23) "{"insert":0,"delete":0}"

preferences:
142.98 ms | 413 KiB | 5 Q