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<?php $string = 'this is test'; preg_match('/(?P<test>.+)/', $string, $matches); // basic syntax var_dump($matches['test']); preg_match('/(?<test>.+)/', $string, $matches); // alternative var_dump($matches['test']); preg_match("/(?'test'.+)/", $string, $matches); // alternative var_dump($matches['test']);
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, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1 - 8.4.2
string(12) "this is test" string(12) "this is test" string(12) "this is test"
Output for 5.2.0 - 5.2.1
string(12) "this is test" Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/84q9T on line 8 string(12) "this is test" Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 2 in /in/84q9T on line 11 string(12) "this is test"
Output for 4.3.11, 4.4.0 - 4.4.5, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
string(12) "this is test" Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/84q9T on line 8 Notice: Undefined index: test in /in/84q9T on line 9 NULL Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 2 in /in/84q9T on line 11 Notice: Undefined index: test in /in/84q9T on line 12 NULL
Output for 4.3.3 - 4.3.10
string(12) "this is test" Warning: Compilation failed: unrecognized character after (?< at offset 3 in /in/84q9T on line 8 Notice: Undefined index: test in /in/84q9T on line 9 NULL Warning: Compilation failed: unrecognized character after (? at offset 2 in /in/84q9T on line 11 Notice: Undefined index: test in /in/84q9T on line 12 NULL
Output for 4.3.0 - 4.3.2
Notice: Undefined index: test in /in/84q9T on line 6 NULL Warning: Compilation failed: unrecognized character after (?< at offset 3 in /in/84q9T on line 8 Notice: Undefined index: test in /in/84q9T on line 9 NULL Warning: Compilation failed: unrecognized character after (? at offset 2 in /in/84q9T on line 11 Notice: Undefined index: test in /in/84q9T on line 12 NULL
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