查询相似度最高的字符串

function closest_word($input, $words) {
		$shortest = -1;
		foreach ($words as $word) {
		  $lev = levenshtein($input, $word);

		  if ($lev == 0) {
			$closest = $word;
			$shortest = 0;
			break;
		  }

		  if ($lev <= $shortest || $shortest < 0) {
			$closest  = $word;
			$shortest = $lev;
		  }
		}
		return $closest;
	}

// 根据传入的州名（可能客户有输错），返回相似度最高的州名称
$united_state_list = array('AL'=>"Alabama",'AK'=>"Alaska",'AZ'=>"Arizona",'AR'=>"Arkansas",'CA'=>"California",'CO'=>"Colorado",'CT'=>"Connecticut",'DE'=>"Delaware",'DC'=>"District Of Columbia",'FL'=>"Florida",'GA'=>"Georgia",'HI'=>"Hawaii",'ID'=>"Idaho",'IL'=>"Illinois",'IN'=>"Indiana",'IA'=>"Iowa",'KS'=>"Kansas",'KY'=>"Kentucky",'LA'=>"Louisiana",'ME'=>"Maine",'MD'=>"Maryland",'MA'=>"Massachusetts",'MI'=>"Michigan",'MN'=>"Minnesota",'MS'=>"Mississippi",'MO'=>"Missouri",'MT'=>"Montana",'NE'=>"Nebraska",'NV'=>"Nevada",'NH'=>"New Hampshire",'NJ'=>"New Jersey",'NM'=>"New Mexico",'NY'=>"New York",'NC'=>"North Carolina",'ND'=>"North Dakota",'OH'=>"Ohio",'OK'=>"Oklahoma",'OR'=>"Oregon",'PA'=>"Pennsylvania",'RI'=>"Rhode Island",'SC'=>"South Carolina",'SD'=>"South Dakota",'TN'=>"Tennessee",'TX'=>"Texas",'UT'=>"Utah",'VT'=>"Vermont",'VA'=>"Virginia",'WA'=>"Washington",'WV'=>"West Virginia",'WI'=>"Wisconsin",'WY'=>"Wyoming");


$input_state = 'Wiscsin';
$state = closest_word($input_state ,array_values($united_state_list));
echo $state;