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run code in 150+ php & hhvm versions
Bugs & Features
<?php $input = <<<INP value that I {want}, vs value "I do {NOT} want". Let's make it {nested {this {time}}}" And" yes, its even "{bullet-{proof}}" :) INP; preg_match_all('~("|\').*?\1(*SKIP)(*FAIL)|\{(?:[^{}]|(?R))*\}~', $input, $m); print_r($m[0]); ?>
Output for 4.4.9, 5.2.5 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => {want} [1] => {nested {this {time}}} )
Output for 5.2.0 - 5.2.4
Warning: preg_match_all(): Compilation failed: nothing to repeat at offset 11 in /in/Rp7gf on line 7
Output for 4.3.11 - 4.4.1, 4.4.3 - 4.4.8, 5.0.0 - 5.1.1, 5.1.3 - 5.1.6
Warning: preg_match_all(): Compilation failed: nothing to repeat at offset 11 in /in/Rp7gf on line 7 Notice: Undefined offset: 0 in /in/Rp7gf on line 9
Output for 4.4.2, 5.1.2
Warning: preg_match_all(): Compilation failed: nothing to repeat at offset 11 in /in/Rp7gf on line 8 Notice: Undefined offset: 0 in /in/Rp7gf on line 10
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: nothing to repeat at offset 11 in /in/Rp7gf on line 7 Notice: Undefined offset: 0 in /in/Rp7gf on line 9