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

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