3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $regex = '((?!a).*)a\{'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "2:".preg_replace('/'.$regex.'/u','WORKED',$test_string)."\n"; echo "3:".preg_replace('/'.$regex.'/','WORKED',$test_string)."\n";
Output for 4.3.0 - 7.2.0
2:AAAAAAAAAAAAAA{AA 3:AAAAAAAAAAAAAA{AA