3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('{\bFirePHP/\d++\.\d++\b}', 'FirePHP/12345678901234567890123456789012345678901234567891234567890123456789.12345678901234567890123456789012345678901234567891234567890123456789a'));
Output for 4.3.0 - 7.2.0
int(0)