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解析php 版获取重定向后的地址(代码)

2018-12-30 PHP 前端之家

前端之家收集整理的这篇文章主要介绍了解析php 版获取重定向后的地址(代码)，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

<div class="codetitle"><a style="CURSOR: pointer" data="60241" class="copybut" id="copybut60241" onclick="doCopy('code60241')"> 代码如下:

<div class="codebody" id="code60241">
//取重定向的地址
class RedirectUrl{
//地址
var $url;
//初始化地址
function RedirectUrl($url){
$this->url = $url;
}
/
get_redirect_url()
取重定向的地址

@param string $url
@return string
/
private function get_redirect_url($url){
$redirect_url = null; $url_parts = @parse_url($url);
if (!$url_parts) return false;
if (!isset($url_parts['host'])) return false; //can't process relative URLs
if (!isset($url_parts['path'])) $url_parts['path'] = '/'; $sock = fsockopen($url_parts['host'],(isset($url_parts['port']) ? (int)$url_parts['port'] : 80),$errno,$errstr,30);
if (!$sock) return false; $request = "HEAD " . $url_parts['path'] . (isset($url_parts['query']) ?'?'.$url_parts['query'] : '') . " HTTP/1.1\r\n";
$request .= 'Host: ' . $url_parts['host'] . "\r\n";
$request .= "Connection: Close\r\n\r\n";
fwrite($sock,$request);
$response = '';
while(!feof($sock)) $response .= fread($sock,8192);
fclose($sock); if (preg_match('/^Location: (.+?)$/m',$response,$matches)){
return trim($matches[1]);
} else {
return false;
}
} /
get_all_redirects()
取所有重定向地址

@param string $url
@return array
/
private function get_all_redirects($url){
$redirects = array();
while ($newurl = $this->get_redirect_url($url)){
if (in_array($newurl,$redirects)){
break;
}
$redirects[] = $newurl;
$url = $newurl;
}
return $redirects;
} /
get_final_url()
取实际地址

@param string $url
@return string
/
function get_final_url(){
$redirects = $this->get_all_redirects($this->url); if (count($redirects)>0){
return array_pop($redirects);
} else {
return $this->url;
}
}
} /
get_show_pic
取最终要显示的图片地址

@param string $url
@return string
/
function get_show_pic($url,$noimg ='noimg.gif',$newimg="http://special.ku6img.com/projects/2010/d-color/images/slt-1.jpg"){
$obj = new RedirectUrl($url); $realurl = $obj->get_final_url(); if(strpos($realurl,$noimg)>0){
return $newimg;
}
return $url;
}
//参考
echo "