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<?php preg_match_all('`{([^{}]+)}(\(((?>[^()]+|(?2))*)\))`', 'test {22413}(ghfhgfhg(())sd(d)sf) s{1}(l(k)l)dfdsf {5}(45d4fsdf4)', $m); print_r($m);
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 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => Array ( [0] => {22413}(ghfhgfhg(())sd(d)sf) [1] => {1}(l(k)l) [2] => {5}(45d4fsdf4) ) [1] => Array ( [0] => 22413 [1] => 1 [2] => 5 ) [2] => Array ( [0] => (ghfhgfhg(())sd(d)sf) [1] => (l(k)l) [2] => (45d4fsdf4) ) [3] => Array ( [0] => ghfhgfhg(())sd(d)sf [1] => l(k)l [2] => 45d4fsdf4 ) )

preferences:
225.55 ms | 406 KiB | 339 Q