php比较相似字符串的方法

$word2compare = "stupid";$words = array(  'stupid',  'stu and pid',  'hello',  'foobar',  'stpid',  'upid',  'stuuupid',  'sstuuupiiid',);while(list($id, $str) = each($words)){  similar_text($str, $word2compare, $percent);  print "Comparing '$word2compare' with '$str': ";  print round($percent) . "%/n";}/*Results:Comparing 'stupid' with 'stupid': 100%Comparing 'stupid' with 'stu and pid': 71%Comparing 'stupid' with 'hello': 0%Comparing 'stupid' with 'foobar': 0%Comparing 'stupid' with 'stpid': 91%Comparing 'stupid' with 'upid': 80%Comparing 'stupid' with 'stuuupid': 86%Comparing 'stupid' with 'sstuuupiiid': 71%*/