php中獲取網站訪客來源的關鍵詞方法

<?php

class keyword{

public function getKeyword($referer){

if(strpos($referer,"http://www.baidu.com")> -1 ){

$keyword = $this->getbaidukeyword($referer);

}else if(strpos($referer,"http://www.google.com")> -1 ){

$keyword = $this->getgooglekeyword($referer);

}else if(strpos($referer,"http://www.soso.com")> -1 ){

$keyword = $this->getsosokeyword($referer);

}else if(strpos($referer,"http://www.sogou.com")> -1 ){

$keyword = $this->getsogoukeyword($referer);

}

return $keyword;

}

//由來路取得百度關鍵詞

private function getbaidukeyword($str){

$s = strpos($str,'wd=');

if($s>-1){

$str = substr($str,$s+3);

$e = strpos($str,'&');

if($e>-1){

$str = substr($str,0,$e);

}

$str = rawurldecode($str)

}

return $str;

}

//獲得谷歌關鍵詞

private function getgooglekeyword($str){

$s = strpos($str,'&q=');

if($s>-1){

$str = substr($str,$s+3);

$e = strpos($str,'&');

if($e>-1){

$str = substr($str,0,$e);

}

$str = rawurldecode($str);

}

return $str;

}

//獲得SOSO關鍵詞

private function getsosokeyword($str){

$s = strpos($str,'?w=');

if($s>-1){

$str = substr($str,$s+3);

$e = strpos($str,'&');

if($e>-1){

$str = substr($str,0,$e);

}

$str = rawurldecode($str);

}else{

$s = strpos($str,'&w=');

if($s>-1){

$str = substr($str,$s+3);

$e = strpos($str,'&');

if($e>-1){

$str = substr($str,0,$e);

}

$str = rawurldecode($str);

}

}

return $str;

}

//獲得sogou關鍵詞

private function getsogoukeyword($str){

$s = strpos($str,'query=');

if($s>-1){

$str = substr($str,$s+6);

$e = strpos($str,'&');

if($e>-1){

$str = substr($str,0,$e);

}

$str = rawurldecode($str);

}

return $str;

}

}

?>