Convert Chinese characters to Pinyin (dede) in php

Convert Chinese characters to Pinyin (dede) in php
Pull an external link!
http://www.tao11.cn/a0b923820dcc509a.html
http://www.tao11.cn/9d4c2f636f067f89.html
http://www.tao11.cn/4b5ce2fe28308fd9.html
http://www.tao11 .cn/bbce2345d7772b06.html
The pinyin.dat inside is nearby

 /**
 * Chinese characters
 * @param string $str String to be converted
 * @param string $charset String encoding
 * @param bool $ishead Whether to extract only the first letter
 * @return string Return result
*/
 static function GetPinyin($str,$charset="utf-8",$ishead = 0) {
 $restr = '';
 $str = trim($str );
 if($charset=="utf-8"){
 $str=iconv("utf-8","gb2312",$str);
 }
 $slen = strlen($str);
 $ pinyins=array();
 if ($slen < 2) {
 return $str;
 }
 $fp = fopen(dirname(__FILE__).'/pinyin.dat', 'r');
 while (! feof($fp)) {
 $line = trim(fgets($fp));
 $pinyins[$line[0] . $line[1]] = substr($line, 3, strlen($line) - 3);
 }
 fclose($fp);

 for ($i = 0; $i < $slen; $i++) {
 if (ord($str[$i]) > 0x80) {
 $c = $str[$i] . $str[$i + 1];
 $i++;
 if (isset($pinyins[$c])) {
 if ($ishead == 0) {
 $restr .= $pinyins[$c];
 } else {
 $restr .= $pinyins[$c][0];
 }
 } else {
 $restr .= "_";
 }
 } else if ( preg_match("/[a-z0-9]/i", $str[$i])) {
 $restr .= $str[$i];
 } else {
 $restr .= "_";
 }
 }
 return $restr;
 }