使用PHP从设置标签ID，类或其他网站中获取标签 [英] Use PHP to get tags within a set tag id, class or other from a Website

问题描述

我卡住了。我试图从远程网站中提取所有html标签，它们的属性以及它们的文本内容，这些标签都位于预定义标签内。

示例：
< div id =its attributes>其文本内容< / div>< / code>< / p>他们的ID或类使用PHP的DOMDocument类，我只是无法让我的头来告诉PHP限制返回到该预定义标记。



示例：
< div id =predefined> ...返回所有此...< / div>

我没有任何代码示例，因为我尝试了大量搜索中的众多选项，并且都返回了错误结果。

您能否请帮忙？

更新：我在这里找到了答案：
PHP函数来抓取< DIV>中的所有链接。在远程站点使用scrape方法

感谢所有帮助。 如果您想了解JavaScript和jQuery：

假设这个HTML：

 < div id =predefined> ...返回所有这些...< / div> 
  

使用此JavaScript代码（使用jQuery）（我试图简化它，但您会如果你学得好的话，做得更好）：

  //从单个HTML标签获取内容
 var theID = 预定的; 
 var theContent = $（＃+ theID）.text（）; //或.html（）如果你想要整个内容
 
 //将提取的内容发布到你的PHP页面以写入你的mySQL数据库
 $ .ajax（{
 type：POST，
 url：http://www.myapp.com/mypage.php，
 data：{id：theID，content：theContent}，
成功：function（response）{//以防万一您需要PHP东西的响应
 alert（response）; 
} 
}）; 
  

然后在你的PHP http://www.myapp.com/mypage.php ：

 <？php 
 $ id = $ _POST [id]; 
 $ content = $ _POST [content]; 
 
 //注意：始终清理发布的数据，以防止注入和其他恶意代码。 
 
 //在这里你可以将数据保存到你的MySQL数据库
 
 echoit worked！; //这是你的成功函数在你的Javascript代码中得到的回应
？> 
  

好吧，我不确定这是您的特例的最佳答案，但无论如何，您真的应该学习JavaScript =）

I'm stuck. I'm trying to extract all html tags, their attributes and their text content that are inside a predefined tag from a remote website.

Example: <div id="its attributes">its text content</div>

I can extract any tag using their id or class by using php's DOMDocument class, I just can't get my head around telling php to limit the return to that predefined tag.

Example: <div id="predefined">... return all this ...</div>

I don't have any examples of code, As i've tried numerous options from numerous searches and all have return false results.

Can you please help?

UPDATE: I've found the answer here: PHP function to grab all links inside a <DIV> on remote site using scrape method

Thanks to all that helped.

解决方案

Just if you want to learn about JavaScript and jQuery :

Assuming this HTML :

<div id="predefined">... return all this ...</div>

Use this JavaScript code (with jQuery) (I'm trying to make it simple but you'll do better if you learn well) :

// To get the content from a single HTML tag
var theID = "predefined";
var theContent = $("#" + theID).text(); // Or .html() if you want the whole content

// To POST the extracted content to your PHP page in order to write to your mySQL db
$.ajax({
    type: "POST",
    url: "http://www.myapp.com/mypage.php",
    data: { id: theID, content: theContent },
    success: function(response){ // just in case you need a response from your PHP stuff
        alert(response);
    }
});

Then in your PHP "http://www.myapp.com/mypage.php" :

<?php
    $id = $_POST["id"];
    $content = $_POST["content"];

    // Note: Always sanitize posted data, to prevent injections and other malicious code.

    // Here you can save the data to your MySQL db

    echo "it worked!"; // This is the response that your "success" function will get in your Javascript code
?>

Well, I'm not sure this is the best answer for your special case, but anyway you really should learn JavaScript =)

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