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run code in 300+ PHP versions simultaneously
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Output for 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
object(Demo)#4 (1) { ["CustomFields"]=> object(Demo2)#3 (1) { ["c"]=> object(Demo3)#2 (4) { ["yes_no_3"]=> string(3) "Yes" ["yes_no_10"]=> string(3) "Yes" ["dog_chipped"]=> string(3) "Yes" ["dog_fouling_sign_required"]=> string(3) "Yes" } } }

preferences:
79.78 ms | 412 KiB | 5 Q