3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( mb_convert_encoding( $bin = hex2bin("5c") . "\\", "UTF-8", "SJIS" ), mb_check_encoding($bin, "SJIS"), bin2hex($bin) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26, 8.1.8 - 8.1.13, 8.2rc1 - rc3
string(2) "\\" bool(true) string(4) "5c5c"
Output for 8.1.0 - 8.1.7
string(4) "¥¥" bool(true) string(4) "5c5c"

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