3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $text = 'say hello to @elise and @john'; function replace_at_symbol($matches){ return "(here you would replace: ".$matches[0]." with something)"; } $output = preg_replace_callback("/([@][a-zA-Z-0-9]+)/", "replace_at_symbol", $text); echo $output; ?>
Output for 4.3.0 - 7.1.0
say hello to (here you would replace: @elise with something) and (here you would replace: @john with something)