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<?php $regex = ' (?<types> (?: (?:\{ (?&types) \}) | (a) ) (\*?) ) '; ini_set('pcre.jit', '0'); $res = preg_match('{^' . $regex . '$}x', '{a}', $matches); ini_set('pcre.jit', '1'); // regex must be different to prevent regex cache, so just add 2nd "x" modifier $res2 = preg_match('{^' . $regex . '$}xx', '{a}', $matches2); var_dump($matches === $matches2); echo 'without JIT:' . "\n"; print_r($matches); echo "\n"; echo 'with JIT:' . "\n"; print_r($matches2);
Output for 4.4.6 - 4.4.9, 5.2.2 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 8.1.26 - 8.1.33, 8.2.13 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
bool(true) without JIT: Array ( [0] => {a} [types] => {a} [1] => {a} [2] => [3] => ) with JIT: Array ( [0] => {a} [types] => {a} [1] => {a} [2] => [3] => )
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.25, 8.2.0 - 8.2.12
bool(false) without JIT: Array ( [0] => {a} [types] => {a} [1] => {a} [2] => a [3] => ) with JIT: Array ( [0] => {a} [types] => {a} [1] => {a} [2] => [3] => )
Output for 5.2.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 14 Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 17 bool(true) without JIT: with JIT:
Output for 4.3.11, 4.4.0 - 4.4.5, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 14 Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 17 bool(true) without JIT: Array ( ) with JIT: Array ( )
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 14 Warning: Compilation failed: unrecognized character after (?< at offset 9 in /in/a9nLn on line 17 bool(true) without JIT: Array ( ) with JIT: Array ( )
preferences:
100.86 ms | 412 KiB | 5 Q