PHP get 301 Jump url_php Tutorial

/** * Get_redirect_url () * Gets The address of the provided URL redirects to, * or FALSE if there ' no redirect.      * * @param string $url * @return string */function get_redirect_url ($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 '): $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, $matches)) {   if (substr ($matches [1], 0, 1) = = "/") return $url _parts[' scheme '). "://" . $url _parts[' host '].        Trim ($matches [1]);      else return Trim ($matches [1]);    } else {return false;  }}/** * Get_all_redirects () * follows and collects all redirects, in order, for the given URL.    * * @param string $url * @return array */function get_all_redirects ($url) {$redirects = array ();        while ($newurl = Get_redirect_url ($url)) {if (In_array ($newurl, $redirects)) {break;        } $redirects [] = $newurl;    $url = $newurl;  } return $redirects;}

PHP implementation with the socket to get 301 jump address, you can extract the URL during the jump

http://www.bkjia.com/PHPjc/621629.html www.bkjia.com true http://www.bkjia.com/PHPjc/621629.html techarticle /** * Get_redirect_url () * Gets The address of the provided URL redirects to, * or FALSE if there ' s no redirect. * @param string $url * @return string */function get_redirect_u ...

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