<?php
$string = '(2+3-4*2(1+1-2)+(2+2)-3+4+2-5*4+2*(1+1))+2+(1+1)';
preg_match_all('@\( ( ( (?>[^()]+) | (?R) )* ) \)@x',$string,$matches);
var_dump($matches);
- Output for 4.3.0 - 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, 5.5.24 - 5.5.35, 5.6.8 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array(3) {
[0]=>
array(2) {
[0]=>
string(40) "(2+3-4*2(1+1-2)+(2+2)-3+4+2-5*4+2*(1+1))"
[1]=>
string(5) "(1+1)"
}
[1]=>
array(2) {
[0]=>
string(38) "2+3-4*2(1+1-2)+(2+2)-3+4+2-5*4+2*(1+1)"
[1]=>
string(3) "1+1"
}
[2]=>
array(2) {
[0]=>
string(5) "(1+1)"
[1]=>
string(3) "1+1"
}
}
preferences:
275.66 ms | 406 KiB | 314 Q