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<?php $etag = '"123-456\"789"'; $regex = '~(?:^|[\h,]+)(?:W/)?(")?(?(1)((?:[^"\\\\]|\\\\.)*(*MARK:Q))(?:"|\\\\|$)|([^,]*(*MARK:T)))~'; \preg_match_all($regex, $etag, $matches, \PREG_SET_ORDER); print_r($matches); echo \preg_replace('/\\\\(.)/', '$1', $matches[2]); var_dump(strpos($etag, '\\'));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [0] => Array ( [0] => "123-456\"789" [1] => " [2] => 123-456\"789 [MARK] => Q ) ) Warning: Undefined array key 2 in /in/4qvYA on line 11 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/4qvYA on line 11 int(8)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => Array ( [0] => "123-456\"789" [1] => " [2] => 123-456\"789 [MARK] => Q ) ) Warning: Undefined array key 2 in /in/4qvYA on line 11 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/4qvYA on line 11 int(8)
Output for 8.0.0 - 8.0.30
Array ( [0] => Array ( [0] => "123-456\"789" [1] => " [2] => 123-456\"789 [MARK] => Q ) ) Warning: Undefined array key 2 in /in/4qvYA on line 11 int(8)
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Array ( [0] => Array ( [0] => "123-456\"789" [1] => " [2] => 123-456\"789 [MARK] => Q ) ) Notice: Undefined offset: 2 in /in/4qvYA on line 11 int(8)
Output for 7.3.32 - 7.3.33
Array ( [0] => Array ( [0] => "123-456\"789" [1] => " [2] => 123-456\"789 [MARK] => Q ) ) int(8)
preferences:
183.34 ms | 402 KiB | 174 Q