3v4l.org

run code in 300+ PHP versions simultaneously
<?php $user_agent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.1) Gecko/20060601 Firefox/2.0.0.1 (Ubuntu-edgy)'; var_dump( strpos( $user_agent, 'Edg' ) ); var_dump( strpos( $user_agent, 'edg' ) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
bool(false) int(91)
preferences:
159.47 ms | 406 KiB | 5 Q