PHP 限制HTML内容中的图片必须是本站的-PHP源码-php.cn

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PHP 限制HTML内容中的图片必须是本站的

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May 25, 2016 pm 05:13 PM

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;));
  }
}

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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>

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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

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