Home >php教程 >PHP源码 >PHP 限制HTML内容中的图片必须是本站的

PHP 限制HTML内容中的图片必须是本站的

PHP中文网
PHP中文网Original
2016-05-25 17:13:401005browse

本文实例讲述了PHP限制HTML内容中图片必须是本站的方法。分享给大家供大家参考。具体实现方法如下:

1. PHP代码如下:

<?php
$dom = new DOMDocument;
$dom->loadHTML(file_get_contents(&#39;input.html&#39;));
$xpath = new DOMXpath($dom);
$img = $xpath->query(&#39;//img&#39;);
foreach($img as $i) {
  $url = parse_url($i->getAttribute(&#39;src&#39;));
  if(isset($url[&#39;host&#39;]) && in_array($url[&#39;host&#39;], array(&#39;yourdomain.com&#39;, &#39;www.yourdomain.com&#39;)) == false) {
    // show an error
      // -- or --
      // remove the tag: $i->parent->removeChild($i)
    echo sprintf(&#39;[FAIL] %s&#39; . PHP_EOL, $i->getAttribute(&#39;src&#39;));
  }
  else {
    echo sprintf(&#39;[PASS] %s&#39; . PHP_EOL, $i->getAttribute(&#39;src&#39;));
  }
}

2. 测试HTML代码:

<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p><img src="/image.jpg"></p>
<p><img src="http://yourdomain.com/image.jpg"></p>
<p><img src="http://www.yourdomain.com/image.jpg"></p>
<p><img src="http://otherdomain.com/image.jpg"></p>

3. 运行结果:

[PASS] /image.jpg
[PASS] http://yourdomain.com/image.jpg
[PASS] http://www.yourdomain.com/image.jpg
[FAIL] http://otherdomain.com/image.jpg
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn