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run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/(?!^.|.$|.\.|\.|.{1,2}@|(?<=@)|(?<=@.)|@)./i', '*', 'example@example.com.ua'); // e****le@ex****e.**m
Output for 4.3.0 - 5.0.5, 5.1.1 - 7.1.10
e****le@ex****e.**m.*a
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/TfGPB on line 3
Process exited with code 255.