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php怎么判断字符串中是否包含html标签？

PHPz
Release： 2020-09-05 11:57:13
Original
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php判断字符串中是否包含html标签的方法：首先使用“strip_tags”函数处理字符串；然后使用if语句判断处理后的字符串“str2”和原字符串“str”是否相等；最后用“strip_tags”函数剥离字符串中的html标签即可。

php怎么判断字符串中是否包含html标签？

php怎么判断字符串中是否包含html标签？

代码示例：

<?php
header("Content-Type: text/html; charset=utf-8");
function judgeHtml($str){
 if($str != strip_tags($str)){
  echo &#39;有&#39;;
 }else{
  echo &#39;无&#39;;
 }
}
judgeHtml(&#39;<html>a&#39;);
echo &#39;<br />&#39;;
judgeHtml(&#39;a&#39;);
?>
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输出：

有
无
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说明：

strip_tags() 函数剥去字符串中的 HTML、XML 以及 PHP 的标签。

注释：该函数始终会剥离 HTML 注释。这点无法通过 allow 参数改变。

返回值：返回被剥离的字符串。

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