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<?php $string = '1234567890-=qwertyuiop[]\asdfghjkl;zxcvbnm,./~!@#$%^&*()_+QWERTYUIOP{}|ASDFGHJKL:"ZXCVBNM<>?'; $chars = "/\d|\W|_/"; $string = preg_replace($chars, '', $string); echo $string;
Output for git.master, git.master_jit, rfc.property-hooks
qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM

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