3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(setlocale(LC_ALL, 'de_DE.ISO-8859-1')); echo bin2hex(str_ireplace(["\xE4", "\xF6", "\xFC"], ['1', '2', '3'], "\xE4\xC4 \xF6\xD6 \xFC\xDC")) . PHP_EOL;
preferences:
27.31 ms | 407 KiB | 5 Q