3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
string(5) "ASCII" string(5) "ASCII" string(8) "SJIS-win" string(5) "ASCII"
Output for 8.1.32, 8.2.0 - 8.2.28
bool(false) bool(false) string(8) "SJIS-win" bool(false)

preferences:
51.08 ms | 412 KiB | 5 Q