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run code in 300+ PHP versions simultaneously
<?php $re = '/(?<!\\\\)([\'"])(?:(?!(?:\1|\\\\)).|\\\\.)*+\1(*SKIP)(*FAIL)|\h+/m'; $str = 'abc | xx ?? "1 x \\\' 3" d e f \\\' y " 5 \\\' x yz abc | xx ?? \'1 x \\" 3\' d e f \\\' y " 5 \\\' x yz '; $result = preg_replace($re, '', $str); echo $result;
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
abc|xx??"1 x \' 3"def\'y"5\'xyz abc|xx??'1 x \" 3'def\'y"5\'xyz
preferences:
162.61 ms | 407 KiB | 5 Q