捕获的致命错误对象不能转换为字符串

Question

我失去了这个错误：

Catchable fatal error Object of class DOMDocument could not be converted to string

这是我的PHP代码：

<?php 
require_once('includes/mysqlConnect.php'); 
require_once('includes/utility.php'); 

//calling utility 
$utility = new Utility(); 

//Creating a connection 
$connection= new mySQL(); 
$connection->connect(); 

$getContent= file_get_contents('http://www.example.com/'); 
//echo $getContent; 

//create a new DOMDocument Object 
$doc= new DOMDocument(); 

//load HTML into DOMDoc 
libxml_use_internal_errors(true); 
$doc->loadHTML($getContent); 
$utility->removeElementsByTagName('script', $doc); 
$utility->removeElementsByTagName('style', $doc); 
$utility->removeElementsByTagName('link', $doc); 
echo $doc->saveHTML(); 

//Insert HTMl to DB 
try 
{ 
     $result=$connection->db_query("CALL finalaggregator.insert_html('$doc')"); 
     if ($result==0){ 
      echo "<span style='color:red;'>Error! Data Saving Processes Unsuccessful</span>"; 
     } 
     else { 
      echo "<span style='color:green;'>Data Successfully Saved!</span>"; 
     } 
} 
catch (Exception $e){ 
    echo "<span color='color:red;'>Error in Storing Data! Please Check Store Procedure.</span>"; 
} 


?> 

但总是显示

结束

DOM Document could not be converted to string on line 29

我想将$ doc的值存储到数据库中。

当我试图从MySQL调用存储过程：

call finalaggregator.insert_html("<p>Testing123</p>"); 

它工作正常。

请帮帮我。我是新来的PHP。

我的存储过程如下：

CREATE DEFINER=`root`@`localhost` PROCEDURE `insert_html`(IN HTML LONGTEXT) 
BEGIN 
    INSERT INTO finalaggregator.site_html (html) VALUES(HTML); 
END 

Answer 1

你不能简单地使用DOMDocument的实例作为查询字符串。你必须明确地将其转换为HTML字符串第一：

$html = $doc->saveHTML(); 
$result = $connection->db_query("CALL finalaggregator.insert_html('$html')");