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<?php preg_match('/b(?<a>a)?/', 'xxxxbxxxx', $matches); var_dump($matches); var_dump(array_has_key('a', $matches));
Output for 7.0.0 - 7.1.0
array(1) { [0]=> string(1) "b" } Fatal error: Uncaught Error: Call to undefined function array_has_key() in /in/dUqf4:7 Stack trace: #0 {main} thrown in /in/dUqf4 on line 7
Process exited with code 255.
Output for 5.2.2 - 5.6.28, hhvm-3.10.0 - 3.12.0
array(1) { [0]=> string(1) "b" } Fatal error: Call to undefined function array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 5.2.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 NULL Fatal error: Call to undefined function array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 array(0) { } Fatal error: Call to undefined function array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 4.4.6 - 4.4.9
array(1) { [0]=> string(1) "b" } Fatal error: Call to undefined function: array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 4.4.5
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 array(0) { } Fatal error: Call to undefined function: array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 4.3.11 - 4.4.4
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 array(0) { } Fatal error: Call to undefined function: array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 array(0) { } Fatal error: Call to undefined function: array_has_key() in /in/dUqf4 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Compilation failed: unrecognized character after (?< at offset 4 in /in/dUqf4 on line 3 array(0) { } Fatal error: Call to undefined function: array_has_key() in /in/dUqf4 on line 7