3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(mb_strlen(hex2bin("80a0a1ef"), "SJIS"));
Output for 8.1.15 - 8.1.33, 8.2.2 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
int(4)
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.14, 8.2.0 - 8.2.1
int(3)
preferences:
93.48 ms | 407 KiB | 5 Q