php获取网页标题和内容函数(不包含html标签)

最新推荐文章于 2023-04-27 02:47:50 发布

my_baby_2009

最新推荐文章于 2023-04-27 02:47:50 发布

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本文分享了一个用于抓取网页内容的PHP函数，该函数能够有效地获取网页的标题、描述、关键词及主体内容，并进行了基本的HTML和JavaScript清理工作。

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获取网页的标题与内容，分享一个采集函数。

代码:

function getPageContent($url) {   
        //$url='http://www.jbxue.com;   
        $pageinfo = array();   
        $pageinfo[content_type] = '';   
        $pageinfo[charset] = '';   
        $pageinfo[title] = '';   
        $pageinfo[description] = '';   
        $pageinfo[keywords] = '';   
        $pageinfo[body] = '';   
        $pageinfo['httpcode'] = 200;   
        $pageinfo['all'] = '';    


        $ch = curl_init();   
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");   
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);   
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);   
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,0);   
        curl_setopt($ch, CURLOPT_TIMEOUT, 8);   
        curl_setopt($ch, CURLOPT_FILETIME, 1);   
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);   
        //curl_setopt($ch, CURLOPT_HEADER, 1);         
        curl_setopt($ch, CURLOPT_URL,$url);   


        $curl_start = microtime(true);   
        $store = curl_exec ($ch);   


        $curl_time = microtime(true) - $curl_start;   
        if( curl_error($ch) ) {   
            $pageinfo['httpcode'] = 505;  //gate way error   
            echo 'Curl error: ' . curl_error($ch) ."/n";   
            return $pageinfo;   
        }   


        //print_r(curl_getinfo($ch));   
        $pageinfo['httpcode'] = curl_getinfo($ch,CURLINFO_HTTP_CODE);   
        //echo curl_getinfo($ch,CURLINFO_CONTENT_TYPE)."/n";   
        $pageinfo[content_type] = curl_getinfo($ch,CURLINFO_CONTENT_TYPE);   
        if(intval($pageinfo['httpcode']) <> 200 or !preg_match('@text/html@',curl_getinfo($ch,CURLINFO_CONTENT_TYPE) )   ) {   
                //print_r(curl_getinfo($ch) );   
                //exit;   
                return $pageinfo;   
        }   
        preg_match('/charset=([^/s/n/r]+)/i',curl_getinfo($ch,CURLINFO_CONTENT_TYPE),$matches); //从header 里取charset   
        if( trim($matches[1]) ) {   
            $pageinfo[charset] = trim($matches[1]);   
        }   
        //echo $pageinfo[charset];   
        //exit;   
        curl_close ($ch);   
        //echo $store;   


  
        //remove javascript   
        $store = preg_replace("/<mce:script.*><!--
(.*)<//script>/smUi",'',$store);   
        //remove link    
        $store = preg_replace("/<link/s+[^>]+>/smUi",'',$store);   
        //remove <!--  -->   
        $store = preg_replace("/<!--.*-->/smUi",'',$store);   
        //remove <style  </<style>   
        $store = preg_replace("/<style.*>(.*)<//style>/smUi",'',$store);   
        //remove 中文空格   
        $store = preg_replace("/　/",'',$store);   
        //remove 标点符号   
        //$store = preg_replace("/[/~`!@#$%^&*()_/-+={}|/[/]//;':"/</>/?/,/.//]/",'',$store);   


           
        //preg_match("/<head.*>(.*)<//head>/smUi",$store, $matches);   
        //$head = $matches[1];   
        //echo $head. "/n";   


        //charset   
        if($pageinfo[charset] == '' ) {  
            preg_match('@<meta.+charset=([/w/-]+)[^>]*>@i',$store,$matches);  
            $pageinfo[charset] = trim($matches[1]);  
        }  
        //desctiption  
        preg_match('@<meta/s+name=/"*description/"*/s+content/s*=/s*([^/>]+)/*>@i',$store,$matches);  
        //print_r($matches);  
        $desc = trim($matches[1]);  
        $pageinfo[description] = str_replace("/"", '',$desc);  


 
        preg_match('@<meta/s+name=/"*keywords/"*/s+content/s*=/s*([^/>]+)/*>@i',$store,$matches);  
        //print_r($matches);  
        $keywords = trim($matches[1]);  
        $pageinfo[keywords] = str_replace("/"", '',$keywords);  


          
        preg_match("/<title>(.*)<//title>/smUi",$store, $matches);  
        $pageinfo[title] = trim($matches[1]);  


        preg_match("/<body.*>(.*)<//body>/smUi",$store, $matches);  
        $pageinfo[body] = addslashes( replaceHtmlAndJs($matches[1]) ) ;  
        $pageinfo['all'] = addslashes( replaceHtmlAndJs($store) ) ;  


        //echo "charset = " . $pageinfo[charset] . "/n";  


        //print_r($pageinfo);  
        //exit;  


          
        return $pageinfo;  


}  


/**  
 * 去掉所有的HTML标记和JavaScript标记  
 */  
function replaceHtmlAndJs($document)   
{   
         $document = trim($document);   
         if (strlen($document) <= 0)   
         {   
          return $document;   
         }   
         $search = array (         
                                            "'<script[^>]*?>.*?
// --></mce:script>'si",  // 去掉 javascript   
                          "'<[///!]*?[^<>]*?>'si",          // 去掉 HTML 标记   
                          "'[/r/n/s+]'",                // 去掉空白字符   
                          "'&(/w+);'i"              // 替换 HTML 实体   
                         );                    // 作为 PHP 代码运行   


         $replace = array ( "", "", "", ""  );   


         return @preg_replace ($search, $replace, $document);   


}

使用例子

$a = getPageContent(www.jbxue.com);   
print_r($a);