3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.20, 8.4.1 - 8.4.6
Warning: array_flip(): Can only flip string and integer values, entry skipped in /in/7bRXI on line 4 false
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_flip(): Can only flip STRING and INTEGER values! in /in/7bRXI on line 4 false
preferences:
152.79 ms | 412 KiB | 5 Q