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run code in 150+ php & hhvm versions
Bugs & Features
<?php $pattern = '/\b' . preg_quote('Ro(M)', '/') . '\b/u'; $sample = 'Ro(M)'; echo (int)preg_match( $pattern, $sample, $matches).PHP_EOL; print_r($matches);
based on R3HCU
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
0 Array ( )
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/1jknO on line 4 0PHP_EOLArray ( )