PHP使用Alexa API获取网站的Alexa排名例子

<ALEXA VER="0.9" URL="jb51./" HOME="0" AID="ScELh1AI3f00az" IDN="jb51./">
<RLS PREFIX="http://" more="0"></RLS>
<SD TITLE="A" FLAGS="" HOST="jb51.">
<LINKSIN NUM="1"/>
</SD>
<SD>
<POPULARITY URL="jb51./" TEXT="7552101" SOURCE="panel"/>
<REACH RANK="6342897"/>
</SD>
</ALEXA>

<php>
function getAlexaRank ($Domain){
     $line = "";
     $data = "";
     $URL = "http://data.alexa./data/?cli=10&dat=snba&url=". $Domain ;
     $fp = fopen ($URL ,"r");
     if ($fp ){
           while (!feof ($fp )){
                $line = fgets ($fp );
                $data .= $line ;
           }
           $p= xml_parser_create ();
           xml_parse_into_struct ($p , $data , $vals );
           xml_parser_free ($p );
           for ($i =0 ;$i <count ($vals );$i ++){
  if ($vals [$i ]["tag"]=="POPULARITY"){
      return  $vals [$i ]["attributes"]["TEXT"];
  }
    }
      }
}
?>

<?php
    echo getAlexaRank("jb51.");
?>