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run code in 300+ PHP versions simultaneously
<?php $re = '/{@(?<func>\w+)(\((?<params>(?:[^()]++|(?2))*)\))}/u'; $str = 'строка с {@rand(1||{@rand(2|3|{@rand(4|5)})})} и {@rand(1|{@rand(2|3|{@rand(4|5)})})}.'; if (preg_match_all($re, $str, $matches, 0, PREG_SET_ORDER)) { print_r($matches["func"]); print_r($matches["params"]); }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.22, 8.1.0 - 8.1.9
Array ( [0] => rand [1] => rand ) Array ( [0] => 1||{@rand(2|3|{@rand(4|5)})} [1] => 1|{@rand(2|3|{@rand(4|5)})} )

preferences:
66.62 ms | 417 KiB | 14 Q