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<?php $str = "( 小黄蜂250 OR 小黄峰 OR 幻影150 ) "; var_dump($str = preg_replace('/\(\s?(^\s.*^\s)\s?\)/', '($1)', $str));
Output for git.master, git.master_jit, rfc.property-hooks
string(44) "( 小黄蜂250 OR 小黄峰 OR 幻影150 ) "

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