3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_export( !ctype_alnum('qdEQ') ); var_export( !ctype_alnum('999qdEQ') );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
falsefalse
preferences:
98.74 ms | 1237 KiB | 4 Q