3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $regex = '#<tag foo="bar">([\w\s]+)\s?</tag>#'; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo Nuzzi</tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo Nuzzi </tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo </tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo</tag>'). " $\n";
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Jacopo Nuzzi $ Jacopo Nuzzi $ Jacopo $ Jacopo $