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<?php echo preg_replace('`{[^{}]+}(\((?>[^()]+|(?-1))+\))`', '<$0>', 'test {22413}(ghfhgfhg(())sd(d)sf) sdfdsf {5}(45d4fsdf4)');
Output for 4.4.9, 5.2.4 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
test {22413}(ghfhgfhg(())sd(d)sf) sdfdsf <{5}(45d4fsdf4)>
Output for hhvm-3.10.0

Process exited with code 137.
Output for 4.3.11 - 4.4.8, 5.0.0 - 5.2.3
Warning: preg_replace(): Compilation failed: unrecognized character after (? at offset 24 in /in/WDeaU on line 2
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (? at offset 24 in /in/WDeaU on line 2