3v4l.org

run code in 300+ PHP versions simultaneously
<?php t_ereg("d"); t_ereg("c"); t_ereg("ct"); t_ereg("coat"); t_ereg("do"); t_ereg("dog"); t_ereg("dogcat"); t_ereg("docat"); t_ereg("doc"); t_ereg("cat"); t_ereg("c1234abct"); function t_ereg ( $line ) { $pattern='dog|c*t'; echo "$pattern=>\"$line\":"; echo (preg_match("/$pattern/", $line))?"1":"0"; echo "\n"; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
dog|c*t=>"d":0 dog|c*t=>"c":0 dog|c*t=>"ct":1 dog|c*t=>"coat":1 dog|c*t=>"do":0 dog|c*t=>"dog":1 dog|c*t=>"dogcat":1 dog|c*t=>"docat":1 dog|c*t=>"doc":0 dog|c*t=>"cat":1 dog|c*t=>"c1234abct":1
preferences:
281.93 ms | 406 KiB | 460 Q