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run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = 'This: (This is a test :))'; echo preg_replace('/[^\(\)\:(?=[\(\)])]/','',$string);
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Compilation failed: unmatched parentheses at offset 17 in /in/KTDr5 on line 4
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unmatched parentheses at offset 17 in /in/KTDr5 on line 4