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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 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
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 ) )