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php去除字符串中的HTML标签技巧

May 24, 2016 pm 12:59 PM

在php中要去除字符串中的HTML标签方法有很多种了,最常用的就是使用strip_tags函数一并去了,只保留字符了,还在就是有选择性的去除了这里要用正则表达式了.

例1:php自带的函数可以去除/删除字符串中的HTML标签/代码:

strip_tags(string,allow):函数剥去 HTML、XML 以及 PHP 的标签.

参数:string,必填,规定要检查的字符串,allow,选填,规定允许存在的标签,这些标签不会被删除,代码如下:

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$str = &#39;郭碗瓢盆-<span style="color:#f00;">PHP</span>&#39;; 

$str1 = strip_tags($str);          // 删除所有HTML标签 

$str2 = strip_tags($str,&#39;<span>&#39;); // 保留 <span>标签 

echo $str1; // 输出 郭碗瓢盆-PHP 

echo $str2; // 样式不一样喔

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例2:清除HTML标签字符串中某些属性代码

使用PHP处理从数据库中读取的文章HTML代码,然后用正则对代码进行匹配与修改,保存代码以后,用静态生成功能即可生成修改后的HTML页面了.

因为我们生成的代码是已经处理过的代码,所以就不会影响HTML页面的加载速度了,具体代码如下:

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<?php 

$str = "<img  src="/static/imghw/default1.png"  data-src=""    style="max-width:90%"lazy"   width="245"  style="max-width:90%" onclick="window.open(&#39;xxxx.gif&#39;)" / alt="php去除字符串中的HTML标签技巧 " >"; 

$str = preg_replace(&#39;#onclick=([sS]*)"#&#39;,&#39;&#39;,$str); 

//开源代码phprm.com

// #符号前面有一个双引号要注意,代表结束的代码 

print($str);

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相关正则介绍:匹配任何内容:[sS]*.


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