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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 - 7.1.7
int(0)