3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php foreach(array('ciao', 'ciao.comeva', '$ciao', '$ciao.comeva', '$ciao.come.va', '$ciao.molto.bene.e.tu') as $string) { if (preg_match('#\$([\w\.]+)#',$string)) { echo $string . ' - OK' . "\n"; } else { echo $string . ' - NOK'. "\n"; } }
Output for 4.3.0 - 7.1.0
ciao - NOK ciao.comeva - NOK $ciao - OK $ciao.comeva - OK $ciao.come.va - OK $ciao.molto.bene.e.tu - OK