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PHP – 正则表达式删除事件属性的所有出现

发布时间:2020-12-13 17:26:42 所属栏目:PHP教程 来源:网络整理
导读:经过几个小时的尝试,我在这里问.我想从POSTed文本中删除所有js事件属性和样式属性的出现.它可能包含也可能不包含新行. 发表示例文字: a href="http://www.google.com" onclick="unwanted_code" style="unwanted_style" ondblclick="unwanted_code" onmouSEO
经过几个小时的尝试,我在这里问.我想从POSTed文本中删除所有js事件属性和样式属性的出现.它可能包含也可能不包含新行.

发表示例文字:

<a href="http://www.google.com" onclick="unwanted_code" style="unwanted_style" ondblclick="unwanted_code" onmouSEOver="unwanted_code">google</a> is a search engine. There are other engines too. <a href="http://www.yahoo.com" onclick="unwanted_code" ondblclick="unwanted_code" onmouSEOver="unwanted_code" style="unwanted_style">yahoo</a> is another engine.

第一次尝试:

$pattern[0] = '/(<[^>]+) on.*=".*?"/iU';
$replace[0] = '$1';
$pattern[1] = '/(<[^>]+) style=".*?"/iU';
$replace[1] = '$1';
$out = preg_replace($pattern,$replace,$in);

输出:

<a href="http://www.google.com">yahoo</a> is another engine.

第二次尝试:

$out = preg_replace_callback('/(<[^>]+) on.*=".*?"/iU',function($m) {return $m[1];},$in);

输出:

<a href="http://www.google.com">yahoo</a> is another engine.

输出我想要的是:

<a href="http://www.google.com">google</a> is a search engine. There are other engines too. <a href="http://www.yahoo.com">yahoo</a> is another engine.

有人帮帮我吗?

解决方法

怎么样:

$content = '<a href="http://www.google.com" onclick="unwanted_code" style="unwanted_style" ondblclick="unwanted_code" onmouSEOver="unwanted_code">google</a> is a search engine. There are other engines too. <a href="http://www.yahoo.com" onclick="unwanted_code" ondblclick="unwanted_code" onmouSEOver="unwanted_code" style="unwanted_style">yahoo</a> is another engine.';

$result = preg_replace('%(<a href="[^"]+")[^>]+(>)%m',"$1$2",$content);
echo $result,"n";

输出:

<a href="http://www.google.com">google</a> is a search engine. There are other engines too. <a href="http://www.yahoo.com">yahoo</a> is another engine.

(编辑:李大同)

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