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<?php $A='one\\"two'; echo strlen($A); var_dump($A); $Input= 'zero:("),one:(\\"),two:(\\\\"),three:(\\\\\\"),four:(\\\\\\\\"),five:(\\\\\\\\\\"),six:(\\\\\\\\\\\\")'; preg_match_all( "/[^\\]*((\\{2})*)(['\"])(.)*\1/U", $Input, $Matches); var_dump($Matches);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
8string(8) "one\"two" Warning: preg_match_all(): Compilation failed: unmatched closing parenthesis at offset 19 in /in/jmkg5 on line 7 NULL
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
8string(8) "one\"two" Warning: preg_match_all(): Compilation failed: unmatched parentheses at offset 19 in /in/jmkg5 on line 7 NULL

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