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<?php $pattern="\(((?>[^()]+)|(?R))*\)"; //$str="(def a (x) (+ 1 x))(print (a 1))"; $str="(aaa)"; preg_match_all($pattern,$str,$out); var_dump($out);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match_all(): Delimiter must not be alphanumeric, backslash, or NUL in /in/X0r8p on line 9 NULL

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