3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( $conv = mb_convert_encoding( $bin = hex2bin("00"), "UTF-8", "ISO-2022-KR" ), mb_check_encoding($bin, "ISO-2022-KR"), bin2hex(mb_convert_encoding($conv, "ISO-2022-KR", "UTF-8")) );
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "" bool(true) string(10) "1b24294300"
Output for 8.1.0 - 8.1.28
string(1) "" bool(true) string(2) "00"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30
string(1) "" bool(false) string(16) "1b2429430e00000f"
preferences:
129.88 ms | 402 KiB | 121 Q