PHP analyzes phonetic functions from alphabetic strings

The following code implements a function that analyzes the phonetic characters within a string given a string, which is useful when analyzing a domain name as a double spell or three spelling.

The

Specific code is as follows:
include (' data.php ');
 
Function Ispinyin ($str) {
 
 global $data;
 
    $str = Str_replace (Strstr ($str, '. '), ', $str ';                     
 
     if (! Preg_match ('/^[a-za-z]+$/', $str)) {
 
            return ' no ';
 
   }
 
 
 
  $pinYinCount = $runCount = 0;
 
 while (strlen ($STR) > 0) { 
 
  $runCount + +;  
 
  foreach ($data [$str {0}] as $key => $value) {   
 
   $curPinYinLen = Strlen ($value);  
 
   if ($value = = substr ($str, 0, $curPinYinLen) {      
 
    $pinYinCount + +;
 
    $pinyin. = $value. ';     
 
    $str = substr ($str, $curPinYinLen);
 
    break;
 
  }
 
 }
 
  if ($pinYinCount < $runCount) {
 
   $str = ';
 
   $pinYinCount = 0;
 
 }
 
 
 
 return $pinyin;
 
}
 
$domain = ' pinyin.com ';
 
Echo ispinyin ($domain); //Pin Yin
$data is an array that includes all phonetic combinations (needs to be optimized)