3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'AreplacehereZ@domain.tld'; $pattern = '/[^A-Z](?=[^@]*@)/'; $replacement = '*'; $replace = preg_replace($pattern, $replacement, $string); echo $replace;
Output for 4.3.0 - 7.1.0
A***********Z@domain.tld