3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = mb_convert_encoding( "test ääöö", "ISO-8859-15", "UTF-8" ); $b = mb_substr( $a, 0, null, "UTF-8" ); $c = mb_convert_encoding( $b, "UTF-8", "ISO-8859-15" ); var_dump($a, $b, $c);
Output for 8.3.2 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
string(9) "test ��" string(9) "test ????" string(9) "test ????"
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.1
string(9) "test ��" string(9) "test ��" string(13) "test ääöö"
preferences:
95.1 ms | 409 KiB | 5 Q