3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 5.4.42, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 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
string(5) "a1: 1" string(7) "b1: abc" string(7) "c1: def" string(5) "a2: 1" string(7) "b2: fgh" string(7) "c2: ijk" string(7) "d2: lmn" string(7) "e2: opq"

preferences:
110.61 ms | 412 KiB | 5 Q