简单的HTML DOM代码问题

Question

我正在开发一个页面，该页面将html div代码添加到我的网站页面并显示在网站上。我的代码是这样的：

require './simpledom.php'; 
$url = 'https://cit2.net/index.php?topic=75443.0'; 
$html = file_get_html($url); if (!empty($html)) { 
$element = $html->find('div[id=msg_783326]'); 
if (!empty($element)) { 
    echo $element; 
     } 
    } 

它不会显示一个东西，因为链接包含的东西在里面。我想让它在我的网站页面中显示该页面中的特定div。我应该在我的代码中进行/编辑，以便将特定的div显示在我的页面中。

编辑：我的HTML代码，我想回显div。

<div id="main_b"> 
<div class="wrapper"> 
<div id="main_content"> 
<?php 
require './simpledom.php'; 
$url = 'https://cit2.net/index.php?topic=75443.0'; 
$html = file_get_html($url); 
if (!empty($html)) { 
$element = $html->find('div[id=msg_783326]'); 
if (!empty($element)) { 
echo $element; 
} 
} 
</div> 
</div> 
</div> 

Answer 1

您的编辑之前，我不知道，你试图echo$element到正确的位置了。但它似乎在你的情况下，你只是忘记了关闭?> php标签。

<div id="main_b"> 
    <div class="wrapper"> 
     <div id="main_content"> 
      <?php 
       require './simpledom.php'; 
       $url = 'https://cit2.net/index.php?topic=75443.0'; 
       $html = file_get_html($url); 
       if (!empty($html)) { 
        $element = $html->find('div[id=msg_783326]'); 
        if (!empty($element)) { 
         echo $element; 
        } 
       } 
      ?> 
     </div> 
    </div> 
</div> 

编辑：仍然不输出任何东西？让我们开始调试过程：

<div id="main_b"> 
    <div class="wrapper"> 
     <div id="main_content"> 
      <?php 
       require './simpledom.php'; 
       $url = 'https://cit2.net/index.php?topic=75443.0'; 
       $html = file_get_html($url); 
       if (!empty($html)) { 
        $element = $html->find('div[id=msg_783326]'); 
        if (!empty($element)) { 
         echo $element; 
        } else { 
         $element = 'element was empty'; 
        } 
       } else { 
        $element = 'html was empty'; 
       } 
       echo $element; 
      ?> 
     </div> 
    </div> 
</div> 

UPDATE：尝试登录编程

<div id="main_b"> 
    <div class="wrapper"> 
     <div id="main_content"> 
      <?php 
       require './simpledom.php'; 
       $login_url = 'https://cit2.net/index.php?action=login'; 
       $topic_url = 'https://cit2.net/index.php?topic=75443.0'; 
       $username = ''; 
       $password = ''; 

       $params = [ 
        'user' => $username, 
        'passwrd' => $password 
       ]; 

       $params = http_build_query($params); 

       // init curl 
       $ch = curl_init(); 

       // set the url to work with 
       curl_setopt($ch, CURLOPT_URL, $login_url); 

       // enable http post 
       curl_setopt($ch, CURLOPT_POST, 1); 

       // set the post parameters 
       curl_setopt($ch, CURLOPT_POSTFIELDS, $params); 

       // handle cookies for the login 
       curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt'); 

       //Setting CURLOPT_RETURNTRANSFER variable to 1 will force cURL 
       //not to print out the results of its query. 
       //Instead, it will return the results as a string return value 
       //from curl_exec() instead of the usual true/false. 
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 

       // execute the request 
       $store = json_decode(curl_exec($ch)); 

       if ($store->status == 'ok') { 
        $html = file_get_html($topic_url); 
        if (!empty($html)) { 
         $element = $html->find('div[id=msg_783326]'); 
         if (!empty($element)) { 
          echo $element; 
         } else { 
          $element = 'element was empty'; 
         } 
        } else { 
         $element = 'html was empty'; 
        } 
       } else { 
        $elment = 'request was bad'; 
       } 
       echo $element; 
      ?> 
     </div> 
    </div> 
</div>