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PHP正则表达式过滤html标签属性(DEMO),正则表达式demo
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PHP正则表达式过滤html标签属性(DEMO),正则表达式demo

Jun 13, 2016 am 08:41 AM
html php Label regular expression filter

PHP正则表达式过滤html标签属性(DEMO),正则表达式demo

过滤html标签在php中可以有内置的函数了,但它过滤的太干净了,我们就整理了一下些利用正则来过滤指定html标签的例子,具体如下所示。

采集的时候有时候需要过滤掉多余的标签属性,比如 img标签过滤掉除了src属性之外的所有属性例如删除titile alt等属性以及一些脚的onclick属性等。

例如

过滤除了src之外的所有属性:

复制代码 代码如下:
$str= preg_replace('/\s(?!src)[a-zA-Z]+=[\'\"]{1}[^\'\"]+[\'\"]{1}/iu',' $str);

上面的实例代码是过滤掉除了src属性外的所有标签属性.

过滤设置过滤除了alt和src之外的所有属性

代码如下:

复制代码 代码如下:
$str = preg_replace('/\s(?!(src|alt))[a-zA-Z]+=[^\s]*/iu',' ', $str);

过滤所有html标签的属性的正则表达式:

复制代码 代码如下:
$str = preg_replace("/]*>/i","",$str );

只过滤alt属性的正则表达式:

复制代码 代码如下:
(\s)alt=[^\s]*

过滤所有html标签的属性的正则表达式:

复制代码 代码如下:
$search = array ("'<script>]*&#63;>.*&#63;</script>'si", // 去掉 javascript
"']*?>'si", // 去掉 HTML 标记
"'([\r\n])[\s]+'", // 去掉空白字符
"'&(quot|#34);'i", // 替换 HTML 实体
"'&(amp|#38);'i",
"'&(lt|#60);'i",
"'&(gt|#62);'i",
"'&(nbsp|#160);'i"
); // 作为 PHP 代码运行
$replace = array ("","","\\1","\"","&",""," ");
$html = preg_replace($search, $replace, $html);

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