<?php
preg_match('/b(?P<a>a)?/', 'xxxxbaxxxx', $matches);
var_dump($matches);
var_dump(array_key_exists('a', $matches));
- Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array(3) {
[0]=>
string(2) "ba"
["a"]=>
string(1) "a"
[1]=>
string(1) "a"
}
bool(true)
- Output for 4.3.0 - 4.3.2
- array(2) {
[0]=>
string(2) "ba"
[1]=>
string(1) "a"
}
bool(false)
preferences:
243.87 ms | 401 KiB | 355 Q