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<?php
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/***************************************************************************
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* Copyright (C) 2009-2011 by Geo Varghese(www.seopanel.in) *
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* sendtogeo@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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include_once(SP_CTRLPATH."/proxy.ctrl.php");
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class Spider{
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# settings of the spider
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var $_CURL_RESOURCE = null;
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var $_CURLOPT_FAILONERROR = false;
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var $_CURLOPT_FOLLOWLOCATION = true;
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var $_CURLOPT_RETURNTRANSFER = true;
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var $_CURLOPT_MAXREDIRS = 4; //Don't get caught in redirect loop
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var $_CURLOPT_TIMEOUT = 15;
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var $_CURLOPT_POST = true;
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var $_CURLOPT_POSTFIELDS = null;
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var $_CURLOPT_USERAGENT = "Mozilla/5.0 (Windows; U; MSIE 9.0; WIndows NT 9.0; en-US))";
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var $_CURLOPT_USERPWD = null;
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var $_CURLOPT_COOKIEJAR = '';
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var $_CURLOPT_COOKIEFILE = '';
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var $_CURLOPT_REFERER = "";
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var $_CURL_sleep = 1;
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var $_CURLOPT_COOKIE = "";
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var $_CURLOPT_HEADER = 0;
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var $_CURL_HTTPHEADER = array();
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var $userAgentList = array();
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var $effectiveUrl = null;
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# spider constructor
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function __construct() {
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$this -> _CURLOPT_COOKIEJAR = SP_TMPPATH.'/'.$this -> _CURLOPT_COOKIEJAR;
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$this -> _CURLOPT_COOKIEFILE = SP_TMPPATH.'/'.$this -> _CURLOPT_COOKIEFILE;
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$this -> _CURL_RESOURCE = curl_init( );
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if(!empty($_SERVER['HTTP_USER_AGENT'])) $this->_CURLOPT_USERAGENT = $_SERVER['HTTP_USER_AGENT'];
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// user agents
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$this->userAgentList['google'] = "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0";
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$this->userAgentList['bing'] = "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0";
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$this->userAgentList['default'] = defined('SP_USER_AGENT') ? SP_USER_AGENT : $this->_CURLOPT_USERAGENT;
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}
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# func to format urls
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public static function formatUrl($url){
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$scheme = "";
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if(stristr($url,'http://')){
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$scheme = "http://";
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}elseif(stristr($url,'https://')){
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$scheme = "https://";
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}
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$url = str_replace(array('http://','https://', '"', '"'), '',$url);
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$url = preg_replace('/\/{2,}/', '/', $url);
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$url = preg_replace('/&{2,}/', '&', $url);
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$url = preg_replace('/#{2,}/', '#', $url);
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$url = Spider::removeTrailingSlash($url);
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return $scheme.$url;
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}
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# func to get relative url to append with relative links found in the page
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function getRelativeUrl($relativeUrl) {
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$relativeUrl = parse_url($relativeUrl, PHP_URL_PATH);
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// if link contains script names
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if(preg_match('/.htm$|.html$|.php$|.pl$|.jsp$|.asp$|.aspx$|.do$|.cgi$|.cfm$/i', $relativeUrl)) {
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if (preg_match('/(.*)\//', $relativeUrl, $matches) ) {
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return $matches[1];
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}
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} elseif (preg_match('/\/$/', $relativeUrl)) {
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return $this->removeTrailingSlash($relativeUrl);
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} else {
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return $relativeUrl;
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}
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}
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# func to get backlink page info
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function getPageInfo($url, $domainUrl, $returnUrls=false){
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$urlWithTrailingSlash = Spider::addTrailingSlash($url);
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$ret = $this->getContent($urlWithTrailingSlash);
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$pageInfo = array(
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'external' => 0,
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'total_links' => 0,
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);
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$checkUrl = formatUrl($domainUrl);
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// if relative links of a page needs to be checked
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if (SP_RELATIVE_LINK_CRAWL) {
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$relativeUrl = $domainUrl . $this->getRelativeUrl($url);
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}
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// find main domain host link
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$domainHostInfo = parse_url($domainUrl);
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$domainHostLink = $domainHostInfo['scheme'] . "://" . $domainHostInfo['host'] . "/";
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if( !empty($ret['page'])){
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$string = str_replace(array("\n",'\n\r','\r\n','\r'), "", $ret['page']);
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$pageInfo = WebsiteController::crawlMetaData($url, '', $string, true);
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// check whether base url tag is there
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$baseTagUrl = "";
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if (preg_match("/<base (.*?)>/is", $string, $match)) {
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$baseTagUrl = $this->__getTagParam("href", $match[1]);
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$baseTagUrl = $this->addTrailingSlash($baseTagUrl);
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}
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$pattern = "/<a(.*?)>(.*?)<\/a>/is";
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preg_match_all($pattern, $string, $matches, PREG_PATTERN_ORDER);
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// loop through matches
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for($i=0; $i < count($matches[1]); $i++){
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// check links foudn valid or not
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$href = $this->__getTagParam("href",$matches[1][$i]);
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if ( !empty($href) || !empty($matches[2][$i])) {
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if( !preg_match( '/mailto:/', $href ) && !preg_match( '/javascript:|;/', $href ) ){
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// find external links
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$pageInfo['total_links'] += 1;
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$external = 0;
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if (stristr($href, 'http://') || stristr($href, 'https://')) {
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if (!preg_match("/^".preg_quote($checkUrl, '/')."/", formatUrl($href))) {
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$external = 1;
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$pageInfo['external'] += 1;
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}
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} else {
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// if url starts with / then append with base url of site
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if (preg_match('/^\//', $href)) {
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$href = $domainHostLink . $href;
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} elseif (!empty($baseTagUrl)) {
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$href = $baseTagUrl . $href;
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} elseif ( $url == $domainUrl) {
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$href = $domainUrl ."/". $href;
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} elseif ( SP_RELATIVE_LINK_CRAWL) {
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$href = $relativeUrl ."/". $href;
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} else {
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$pageInfo['total_links'] -= 1;
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continue;
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}
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// if contains back directory operator
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if (stristr($href, '/../')) {
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$hrefParts = explode('/../', $href);
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preg_match('/.*\//', $hrefParts[0], $matchpart);
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$href = $matchpart[0]. $hrefParts[1];
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}
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}
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// if details of urls to be checked
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if($returnUrls){
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$linkInfo['link_url'] = $href;
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if(stristr($matches[2][$i], '<img')) {
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$linkInfo['link_anchor'] = $this->__getTagParam("alt", $matches[2][$i]);
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} else {
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$linkInfo['link_anchor'] = strip_tags($matches[2][$i]);
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}
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$linkInfo['nofollow'] = stristr($matches[1][$i], 'nofollow') ? 1 : 0;
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$linkInfo['link_title'] = $this->__getTagParam("title", $matches[1][$i]);
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if ($external) {
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$pageInfo['external_links'][] = $linkInfo;
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} else {
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$pageInfo['site_links'][] = $linkInfo;
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}
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}
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}
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}
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}
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}
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return $pageInfo;
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}
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# function to remove last trailing slash
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public static function removeTrailingSlash($url) {
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$url = preg_replace('/\/$/', '', $url);
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return $url;
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}
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# function to remove last trailing slash
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public static function addTrailingSlash($url) {
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if (!stristr($url, '?') && !stristr($url, '#')) {
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if (!preg_match("/\.([^\/]+)$/", $url)) {
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if (!preg_match('/\/$/', $url)) {
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$url .= "/";
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}
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}
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}
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return $url;
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}
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# func to get unique urls of a page
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function getUniqueUrls($url){
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$ret = $this->getContent($url);
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$urlList = array();
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if( !empty($ret['page'])){
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$string = strtolower($ret['page']);
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$string = str_replace("\n","",$string);
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$pattern = "/<a (.*)>(.*\n*.*|.*\n*)<\/a>/U";
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preg_match_all($pattern,$string,$matches, PREG_PATTERN_ORDER);
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for($i=0;$i<count($matches[1]);$i++){
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$href = $this->getTagParam("href",$matches[1][$i]);
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$href = preg_replace('/\/{3}/', '/', $href);
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if(!empty($href)){
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if( !preg_match( '/mailto:/', $href ) && ($href!="#") && !preg_match( '/javascript:|;/', $href ) ){
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if($href != "/"){
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$urlList[] = $href;
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}
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}
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}
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}
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}
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return $urlList;
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}
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# function to get value of a parameter in a tag
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function __getTagParam($param, $tag){
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preg_match('/'.$param.'="(.*?)"/is', $tag, $matches);
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if(empty($matches[1])){
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preg_match("/$param='(.*?)'/is", $tag, $matches);
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if(empty($matches[1])){
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preg_match("/$param=(.*?) /is", $tag, $matches);
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}
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}
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if(isset($matches[1])) return trim($matches[1]) ;
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}
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# function to get the useragent
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function getUserAgent($key = false) {
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$userAgentKey = !empty($key) ? $key : 'default';
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return $this->userAgentList[$userAgentKey];
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}
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# function to create custome headers
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function setCustomHeaders() {
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// if sending custom header with curl is enabled
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if (SP_SEND_CUSTOM_HEADER_IN_CURL) {
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$sessionId = session_id();
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$sessionId = !empty($sessionId) ? $sessionId : session_regenerate_id();
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array_push($this ->_CURL_HTTPHEADER, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
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array_push($this ->_CURL_HTTPHEADER, "Connection: keep-alive");
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array_push($this ->_CURL_HTTPHEADER, "Cache-Control: max-age=0");
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array_push($this ->_CURL_HTTPHEADER, "Cookie: PHPSESSID=" . $sessionId);
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array_push($this ->_CURL_HTTPHEADER, "User-Agent: " . $this -> _CURLOPT_USERAGENT);
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}
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}
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# get contents of a web page
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function getContent( $url, $enableProxy=true, $logCrawl = true) {
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_URL , $url );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_FAILONERROR , $this -> _CURLOPT_FAILONERROR );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_MAXREDIRS , $this -> _CURLOPT_MAXREDIRS );
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@curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_FOLLOWLOCATION , $this -> _CURLOPT_FOLLOWLOCATION );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_RETURNTRANSFER , $this -> _CURLOPT_RETURNTRANSFER );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_TIMEOUT , $this -> _CURLOPT_TIMEOUT );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_COOKIEJAR , $this -> _CURLOPT_COOKIEJAR );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_COOKIEFILE , $this -> _CURLOPT_COOKIEFILE );
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_HEADER , $this -> _CURLOPT_HEADER);
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// to fix the ssl related issues
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curl_setopt($this->_CURL_RESOURCE, CURLOPT_SSL_VERIFYHOST, 0);
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curl_setopt($this->_CURL_RESOURCE, CURLOPT_SSL_VERIFYPEER, 0);
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// user agent assignment, if the url is not the main website
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if (stristr($url, SP_MAIN_SITE)) {
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$this -> _CURLOPT_USERAGENT = "";
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} else {
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$ugKey = false;
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if (stristr($url, 'google.')) {
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$ugKey = 'google';
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} else if (stristr($url, 'bing.')) {
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$ugKey = 'bing';
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}
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$this->_CURLOPT_USERAGENT = $this->getUserAgent($ugKey);
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if( strlen( $this -> _CURLOPT_USERAGENT ) > 0 ) {
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curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_USERAGENT, $this -> _CURLOPT_USERAGENT );
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}
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}
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// set custom headers for google domains
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if (stristr($url, 'google.')) {
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$this->setCustomHeaders();
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}
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// to add the curl http headers
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if (!empty($this ->_CURL_HTTPHEADER)) {
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curl_setopt($this->_CURL_RESOURCE, CURLOPT_HTTPHEADER, $this ->_CURL_HTTPHEADER);
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}
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if(!empty($this -> _CURLOPT_COOKIE)) curl_setopt( $this -> _CURL_RESOURCE, CURLOPT_COOKIE , $this -> _CURLOPT_COOKIE );
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321 |
if(!empty($this-> _CURLOPT_REFERER)){
|
|
|
322 |
curl_setopt($this -> _CURL_RESOURCE, CURLOPT_REFERER, $this-> _CURLOPT_REFERER);
|
|
|
323 |
}
|
|
|
324 |
|
|
|
325 |
if( strlen( $this -> _CURLOPT_POSTFIELDS ) > 1 ) {
|
|
|
326 |
curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_POST , $this -> _CURLOPT_POST );
|
|
|
327 |
curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_POSTFIELDS , $this -> _CURLOPT_POSTFIELDS );
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|
|
328 |
}
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|
329 |
|
|
|
330 |
if( strlen( $this -> _CURLOPT_USERPWD ) > 2 ) {
|
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|
331 |
curl_setopt( $this -> _CURL_RESOURCE , CURLOPT_USERPWD, $this -> _CURLOPT_USERPWD );
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|
332 |
}
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|
333 |
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|
334 |
// to use proxy if proxy enabled
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|
335 |
if (SP_ENABLE_PROXY && $enableProxy) {
|
|
|
336 |
$proxyCtrler = New ProxyController();
|
|
|
337 |
if ($proxyInfo = $proxyCtrler->getRandomProxy()) {
|
|
|
338 |
curl_setopt($this -> _CURL_RESOURCE, CURLOPT_PROXY, $proxyInfo['proxy'].":".$proxyInfo['port']);
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|
339 |
|
|
|
340 |
if (CURLOPT_HTTPPROXYTUNNEL_VAL) {
|
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|
341 |
curl_setopt($this -> _CURL_RESOURCE, CURLOPT_HTTPPROXYTUNNEL, CURLOPT_HTTPPROXYTUNNEL_VAL);
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|
342 |
}
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|
343 |
|
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|
344 |
if (!empty($proxyInfo['proxy_auth'])) {
|
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|
345 |
curl_setopt ($this -> _CURL_RESOURCE, CURLOPT_PROXYUSERPWD, $proxyInfo['proxy_username'].":".$proxyInfo['proxy_password']);
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|
346 |
}
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|
347 |
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|
348 |
} else {
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|
349 |
showErrorMsg("No active proxies found!! Please check your proxy settings from Admin Panel.");
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|
350 |
}
|
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|
351 |
}
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|
352 |
|
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|
353 |
$ret = [];
|
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|
354 |
$ret['page'] = curl_exec( $this -> _CURL_RESOURCE );
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|
355 |
$ret['error'] = curl_errno( $this -> _CURL_RESOURCE );
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|
356 |
$ret['errmsg'] = curl_error( $this -> _CURL_RESOURCE );
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|
357 |
|
|
|
358 |
$this->effectiveUrl = curl_getinfo($this -> _CURL_RESOURCE, CURLINFO_EFFECTIVE_URL);
|
|
|
359 |
|
|
|
360 |
// update crawl log in database for future reference
|
|
|
361 |
if ($logCrawl) {
|
|
|
362 |
$crawlLogCtrl = new CrawlLogController();
|
|
|
363 |
$crawlInfo = [];
|
|
|
364 |
$crawlInfo['crawl_status'] = $ret['error'] ? 0 : 1;
|
|
|
365 |
$crawlInfo['ref_id'] = $crawlInfo['crawl_link'] = addslashes($this->effectiveUrl);
|
|
|
366 |
$crawlInfo['crawl_referer'] = addslashes($this-> _CURLOPT_REFERER);
|
|
|
367 |
$crawlInfo['crawl_cookie'] = addslashes($this -> _CURLOPT_COOKIE);
|
|
|
368 |
$crawlInfo['crawl_post_fields'] = addslashes($this -> _CURLOPT_POSTFIELDS);
|
|
|
369 |
$crawlInfo['crawl_useragent'] = addslashes($this->_CURLOPT_USERAGENT);
|
|
|
370 |
$crawlInfo['proxy_id'] = intval($proxyInfo['id']);
|
|
|
371 |
$crawlInfo['log_message'] = addslashes($ret['errmsg']);
|
|
|
372 |
$ret['log_id'] = $crawlLogCtrl->createCrawlLog($crawlInfo);
|
|
|
373 |
}
|
|
|
374 |
|
|
|
375 |
// disable proxy if not working
|
|
|
376 |
if (SP_ENABLE_PROXY && $enableProxy && !empty($ret['error']) && !empty($proxyInfo['id'])) {
|
|
|
377 |
|
|
|
378 |
// deactivate proxy
|
|
|
379 |
if (PROXY_DEACTIVATE_CRAWL) {
|
|
|
380 |
$proxyCtrler->__changeStatus($proxyInfo['id'], 0);
|
|
|
381 |
}
|
|
|
382 |
|
|
|
383 |
// chekc with another proxy
|
|
|
384 |
if (CHECK_WITH_ANOTHER_PROXY_IF_FAILED) {
|
|
|
385 |
$ret = $this->getContent($url, $enableProxy);
|
|
|
386 |
}
|
|
|
387 |
}
|
|
|
388 |
|
|
|
389 |
// debug run time if enabled
|
|
|
390 |
$this->debugRunTime($ret);
|
|
|
391 |
|
|
|
392 |
return $ret;
|
|
|
393 |
}
|
|
|
394 |
|
|
|
395 |
# function to debug runtime
|
|
|
396 |
function debugRunTime($ret) {
|
|
|
397 |
|
|
|
398 |
// check debug request is enabled
|
|
|
399 |
if (!empty($_GET['debug']) || !empty($_POST['debug'])) {
|
|
|
400 |
?>
|
|
|
401 |
<div style="width: 760px; margin-top: 30px; padding: 14px; height: 900px; overflow: auto; border: 1px solid #B0C2CC;">
|
|
|
402 |
<?php
|
|
|
403 |
if ( ($_GET['debug_format'] == 'html') || ($_POST['debug_format'] == 'html') ) {
|
|
|
404 |
highlight_string($ret['page']);
|
|
|
405 |
} else {
|
|
|
406 |
debugVar($ret, false);
|
|
|
407 |
}
|
|
|
408 |
?>
|
|
|
409 |
</div>
|
|
|
410 |
<?php
|
|
|
411 |
}
|
|
|
412 |
|
|
|
413 |
}
|
|
|
414 |
|
|
|
415 |
# func to get session id
|
|
|
416 |
function getSessionId($page){
|
|
|
417 |
if (preg_match('/PHPSESSID=(.*?);/', $page, $result)) {
|
|
|
418 |
return $result[1];
|
|
|
419 |
} else {
|
|
|
420 |
return false;
|
|
|
421 |
}
|
|
|
422 |
}
|
|
|
423 |
|
|
|
424 |
# func to check proxy
|
|
|
425 |
function checkProxy($proxyInfo) {
|
|
|
426 |
$this->_CURLOPT_USERAGENT = $this->getUserAgent();
|
|
|
427 |
$ch = curl_init();
|
|
|
428 |
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
|
|
|
429 |
curl_setopt($ch, CURLOPT_PROXY, $proxyInfo['proxy'].":".$proxyInfo['port']);
|
|
|
430 |
curl_setopt($ch, CURLOPT_HEADER, 1);
|
|
|
431 |
curl_setopt($ch, CURLOPT_USERAGENT, $this->_CURLOPT_USERAGENT);
|
|
|
432 |
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
|
|
|
433 |
|
|
|
434 |
if (CURLOPT_HTTPPROXYTUNNEL_VAL) {
|
|
|
435 |
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, CURLOPT_HTTPPROXYTUNNEL_VAL);
|
|
|
436 |
}
|
|
|
437 |
|
|
|
438 |
if (!empty($proxyInfo['proxy_auth'])) {
|
|
|
439 |
curl_setopt ($ch, CURLOPT_PROXYUSERPWD, $proxyInfo['proxy_username'].":".$proxyInfo['proxy_password']);
|
|
|
440 |
}
|
|
|
441 |
|
|
|
442 |
// set custom headers
|
|
|
443 |
$this->setCustomHeaders();
|
|
|
444 |
|
|
|
445 |
// to add the curl http headers
|
|
|
446 |
if (!empty($this ->_CURL_HTTPHEADER)) {
|
|
|
447 |
curl_setopt($ch, CURLOPT_HTTPHEADER, $this ->_CURL_HTTPHEADER);
|
|
|
448 |
}
|
|
|
449 |
|
|
|
450 |
// to fix the ssl related issues
|
|
|
451 |
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
|
|
|
452 |
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
|
|
|
453 |
|
|
|
454 |
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/search?q=twitter");
|
|
|
455 |
$ret['page'] = curl_exec( $ch );
|
|
|
456 |
$ret['error'] = curl_errno( $ch );
|
|
|
457 |
$ret['errmsg'] = curl_error( $ch );
|
|
|
458 |
curl_close($ch);
|
|
|
459 |
|
|
|
460 |
// if no error check whether the ouput contains twitter keyword
|
|
|
461 |
if (empty($ret['error'])) {
|
|
|
462 |
|
|
|
463 |
// is captcha found in search results
|
|
|
464 |
if (SearchEngineController::isCaptchInSearchResults($ret['page'])) {
|
|
|
465 |
$ret['error'] = "Capctha found in the results";
|
|
|
466 |
$ret['errmsg'] = strtok($ret['page'], "\n");
|
|
|
467 |
} elseif(!stristr($ret['page'], 'twitter')) {
|
|
|
468 |
$ret['error'] = "Page not contains twitter keyword";
|
|
|
469 |
$ret['errmsg'] = strtok($ret['page'], "\n");
|
|
|
470 |
}
|
|
|
471 |
|
|
|
472 |
}
|
|
|
473 |
|
|
|
474 |
// debug run time if enabled
|
|
|
475 |
$this->debugRunTime($ret);
|
|
|
476 |
|
|
|
477 |
return $ret;
|
|
|
478 |
}
|
|
|
479 |
|
|
|
480 |
// function to get the header of url
|
|
|
481 |
public static function getHeader($url, $followRedirects = true){
|
|
|
482 |
$ch = curl_init();
|
|
|
483 |
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
|
|
|
484 |
curl_setopt($ch, CURLOPT_URL, $url);
|
|
|
485 |
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
|
|
|
486 |
curl_setopt($ch, CURLOPT_USERAGENT, SP_USER_AGENT);
|
|
|
487 |
if($followRedirects){
|
|
|
488 |
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
|
|
|
489 |
}
|
|
|
490 |
curl_setopt($ch, CURLOPT_MAXREDIRS, 4);
|
|
|
491 |
|
|
|
492 |
// Only calling the head
|
|
|
493 |
curl_setopt($ch, CURLOPT_HEADER, true); // header will be at output
|
|
|
494 |
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'HEAD'); // HTTP request is 'HEAD'
|
|
|
495 |
|
|
|
496 |
// to fix the ssl related issues
|
|
|
497 |
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
|
|
|
498 |
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
|
|
|
499 |
|
|
|
500 |
$content = curl_exec ($ch);
|
|
|
501 |
curl_close ($ch);
|
|
|
502 |
return $content;
|
|
|
503 |
}
|
|
|
504 |
|
|
|
505 |
// function to check whether link is brocke
|
|
|
506 |
public static function isLInkBrocken($url) {
|
|
|
507 |
$header = Spider::getHeader($url);
|
|
|
508 |
if (stristr($header, '404 Not Found')) {
|
|
|
509 |
return true;
|
|
|
510 |
} else {
|
|
|
511 |
return 0;
|
|
|
512 |
}
|
|
|
513 |
}
|
|
|
514 |
|
|
|
515 |
// function to check whether link is a redirect
|
|
|
516 |
public static function isLinkRedirect($url) {
|
|
|
517 |
$followRedirects = false; //don't follow with cURL as we need that info.
|
|
|
518 |
$header = $this->getHeader($url, $followRedirects);
|
|
|
519 |
if (stristr($header, '301 Moved Permanently') || stristr($header, '308 Permanent Redirect')) {
|
|
|
520 |
return true;
|
|
|
521 |
} else {
|
|
|
522 |
return 0;
|
|
|
523 |
}
|
|
|
524 |
}
|
|
|
525 |
}
|
|
|
526 |
?>
|