nguyeexn minh hieesu public static function convertText($vietnamese_txt){ $vietnamese_char = array( "đ", "ó","ỏ","ò","ọ","õ","ô","ỗ","ổ","ồ","ố","ộ","ơ","ỡ","ớ","ờ","ở","ợ", "ì","í","ỉ","ì","ĩ","ị", "ê","ệ","ế","ể","ễ","ề","é","ẹ","ẽ","è","ẻ", "ả","á","ạ","ã","à","â","ẩ","ấ","ầ","ậ","ẫ","ă","ẳ","ắ","ằ","ặ","ẵ", "ũ","ụ","ú","ủ","ù","ư","ữ","ự","ứ","ử","ừ", "ỹ","ỵ","ý","ỷ","ỳ", ); $equivalent_char = array( "dd", "os","or","of","oj","ox","oo","oox","oor","oof","oos","ooj","ow","owx","ows","owf","owr","owj", "if","is","ir","if","ix","ij", "ee","eej","ees","eef","eex","eer","es","ej","ex","ef","or", "ar","as","aj","ax","af","aa","aar","aas","aaf","aaj","aax","aw","awr","aws","awf","awj","aax", "ux","uj","us","ur","uf","uw","uwx","uwj","uws","uwr","uwf", "yx","yj","ys","yr","yf", ); return str_replace($vietnamese_char, $equivalent_char, static::convert_lower($vietnamese_txt)); } }