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<?php $string = 'Lorem ipsum dolor-sit_amet 123 .'; preg_match('~^[\pL\pN\pP\pZ}]+$~u', $string, $alphanumeric); var_dump($alphanumeric);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(32) "Lorem ipsum dolor-sit_amet 123 ." }

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