3v4l.org

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
string(4) "???" bool(false) string(8) "7f3f3f3f"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30
string(19) "BAD+FFBAD+FFBAD+FF" bool(false) string(38) "7f4241442b46464241442b46464241442b4646"
preferences:
105.38 ms | 412 KiB | 5 Q