dpl22899 2017-04-11 05:58
浏览 47
已采纳

用子节点PHP替换DOMDocument父节点

This is my HTML code and I wanna replace <a> tag with <img> tag using DOMDocument.

<a href='xxx.com'><img src='yyy.jpg'></a>

Here is the PHP code:

$newNode=cj_DOMinnerHTML($link); //$link refer to anchor tag 
$image_dom = new DOMDocument();
$image_dom->loadHTML($newNode);
$link->parentNode->replaceChild($image_dom, $link); //this replace making my parent node empty 

cj_DOMinnerHTML is function which return child nodes as HTML.

  • 写回答

1条回答 默认 最新

  • ds78662302 2017-04-11 16:29
    关注

    Hello_ mate.

    If I understood you well you want to remove the <a> tags and I don't know what exactly your function cj_DOMinnerHTML is doing, but I see that your are passing instance of DOMDocument to replaceChild method as first argument which is wrong. Refer to documentation to see how exactly is replaceChild working (it accepts two arguments of type DOMNode). Anyway I give you a code snippet that is replacing the <a> tags. Please read the comments that I put in code and try to change the code for your use case.

    $html = '
    <div id="container">
        <a href="xxx.com"><img src="yyy.jpg"></a>
        <a href="aaa.com"><img src="aaa.jpg"></a>
        <a href="bbb.com"><img src="bbb.jpg"></a>
        <a href="ccc.com"><img src="ccc.jpg"></a>
        <a href="ddd.com"><img src="ddd.jpg"></a>
        <a href="eee.com"><img src="eee.jpg"></a>
    </div>';
    
    // load the dom document
    $dom = new \DOMDocument();
    if (!$dom->loadHTML($html)) {
        echo '<h2>Error handle this ...</h2>';
    }
    
    // instantiate DOMXPath object
    $finder = new \DOMXPath($dom);
    
    // get all <a> tags of element that has id="container"
    $anchors = $finder->query("//*[contains(concat(' ', normalize-space(@id), ' '), 'container')]/descendant::a");
    
    // loop through all <a>
    foreach ($anchors as $a) {
        $parent = $a->parentNode;
        // the following row of code will actually remove the <a> tag
        $parent->replaceChild($a->childNodes->item(0), $a);
    }
    
    // show output
    echo htmlspecialchars($dom->saveHTML());
    

    OUTPUT

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> 
    <html>
        <body>
            <div id="container"> 
                <img src="yyy.jpg"> 
                <img src="aaa.jpg"> 
                <img src="bbb.jpg"> 
                <img src="ccc.jpg"> 
                <img src="ddd.jpg"> 
                <img src="eee.jpg"> 
            </div>
        </body>
    </html> 
    

    I hope you will understand the code and you will be able to modify it to work for your needs.

    Good luck friend!

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 关于#matlab#的问题:在模糊控制器中选出线路信息,在simulink中根据线路信息生成速度时间目标曲线(初速度为20m/s,15秒后减为0的速度时间图像)我想问线路信息是什么
  • ¥15 banner广告展示设置多少时间不怎么会消耗用户价值
  • ¥16 mybatis的代理对象无法通过@Autowired装填
  • ¥15 可见光定位matlab仿真
  • ¥15 arduino 四自由度机械臂
  • ¥15 wordpress 产品图片 GIF 没法显示
  • ¥15 求三国群英传pl国战时间的修改方法
  • ¥15 matlab代码代写,需写出详细代码,代价私
  • ¥15 ROS系统搭建请教(跨境电商用途)
  • ¥15 AIC3204的示例代码有吗,想用AIC3204测量血氧,找不到相关的代码。