php 版获取重定向后的地址

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 ""; ?>

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 ""; ?>