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Homephp教程PHP源码php利用正则过滤链接、标签,空格,换行符程序

本文章详细的总结了php利用正则过滤链接、标签,空格,换行符程序,有需要学习的朋友可参考一下。

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strip_tags函数

strip_tags --- 去除字串中的HTML和PHP标签

语法 : string strip_tags (string str [, string allowable_tags])

 代码如下 复制代码

$text = '

Test paragraph.

Other text';
echo strip_tags($text);
echo "n";

// Allow

and
echo strip_tags($text, '

');
?>

正则过滤各种标签,空格,换行符

 代码如下 复制代码

$str=preg_replace("/s+/", " ", $str); //过滤多余回车
$str=preg_replace("/ $str=preg_replace("//si","",$str); //注释
$str=preg_replace("//si","",$str); //过滤DOCTYPE
$str=preg_replace("//si","",$str); //过滤html标签
$str=preg_replace("//si","",$str); //过滤head标签
$str=preg_replace("//si","",$str); //过滤meta标签
$str=preg_replace("//si","",$str); //过滤body标签
$str=preg_replace("//si","",$str); //过滤link标签
$str=preg_replace("//si","",$str); //过滤form标签
$str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签
$str=preg_replace("/(.*?)/si","",$str); //过滤applet标签
$str=preg_replace("//si","",$str); //过滤applet标签
$str=preg_replace("/(.*?)/si","",$str); //过滤style标签
$str=preg_replace("//si","",$str); //过滤style标签
$str=preg_replace("/(.*?)/si","",$str); //过滤title标签
$str=preg_replace("//si","",$str); //过滤title标签
$str=preg_replace("/(.*?)/si","",$str); //过滤object标签
$str=preg_replace("//si","",$str); //过滤object标签
$str=preg_replace("/(.*?)/si","",$str); //过滤noframes标签
$str=preg_replace("//si","",$str); //过滤noframes标签
$str=preg_replace("/(.*?)/si","",$str); //过滤frame标签
$str=preg_replace("//si","",$str); //过滤frame标签
$str=preg_replace("/(.*?)/si","",$str); //过滤script标签
$str=preg_replace("//si","",$str); //过滤script标签
$str=preg_replace("/javascript/si","Javascript",$str); //过滤script标签
$str=preg_replace("/vbscript/si","Vbscript",$str); //过滤script标签
$str=preg_replace("/on([a-z]+)s*=/si","On\1=",$str); //过滤script标签
$str=preg_replace("//si","&#",$str); //过滤script标签

php 正则过滤html 的超链接

 代码如下 复制代码
echo preg_replace("/(?]*)(?=>)/i","#", "你好,点这里看看你好,点这里看看");
?>

正则:/(?]*)(?=>)/
(? (?=exp) 匹配exp前面的位置
此正则 匹配 在 href= 之后 “>” 之前 的 非 “>” 的所有字符
例子:
找到这些字符(url)用 # 替换,就可以去掉html里的所有链接。

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