3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $quotedString = '"(?:[^"\\\\]*(?\\\\.(*SKIP)(*FAIL))?)*"'; $regex = "($quotedString)"; $string = 'This is "A test of the \"Emergency System\" here..."'; var_dump(preg_match($regex, $string, $match), $match);
Output for 5.2.6 - 7.1.0
Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 13 in /in/YWYTm on line 8 bool(false) NULL
Output for 5.2.0 - 5.2.5
Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 13 in /in/YWYTm on line 8 bool(false) NULL
Output for 4.3.11 - 4.4.8, 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 13 in /in/YWYTm on line 8 bool(false) array(0) { }
Output for 4.4.9
Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 13 in /in/YWYTm on line 8 bool(false) array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (? at offset 13 in /in/YWYTm on line 8 bool(false) array(0) { }