blocks|key|502086|text|尝试检查他们的'MSIE+6.'用户代理。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|502087|$using_ie6+=+(strpos($_SERVER['HTTP_USER_AGENT'],+'MSIE+6.')+!==+FALSE);|code-block|syntax|javascript|502088|这是基于this+user+agent+information的。|502089|entityMap|0|LINK|mutability|MUTABLE|url|http://www.useragentstring.com/pages/Internet%2520Explorer/^0|7|9|0|0|4|R|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Try checking their user agent for <code>'MSIE 6.'</code>.

<pre><code>$using_ie6 = (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6.') !== FALSE);
</code></pre>

This is based on <a href="http://www.useragentstring.com/pages/Internet%20Explorer/" rel="noreferrer">this user agent information</a>.

blocks|key|4567179|text|这个页面上的许多基于用户代理的答案并不太可靠，因为Opera经常将自己标识为包含"MSIE+6.0“的用户代理字符串，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4567180|Mozilla/4.0+(compatible;+MSIE+6.0;+X11;+Linux+i686;+en)+Opera+9.51|code-block|syntax|javascript|4567181|这会影响Opera+5到Opera+9的所有版本，甚至影响Opera+10，并且可以在Opera中打开或关闭。。|4567182|我见过的一种常见的方法是测试"MSIE“和"Opera”。例如,|4567183|if+(preg_match('/\bmsie+6/i',+$ua)+&&+!preg_match('/\bopera/i',+$ua))
++echo+"We+have+IE6!";|4567184|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Many of the user-agent based answers on this page aren't too reliable because Opera often identifies itself with a user-agent string containing "MSIE 6.0", such as:

<pre><code>Mozilla/4.0 (compatible; MSIE 6.0; X11; Linux i686; en) Opera 9.51
</code></pre>

This affects all versions of Opera 5 through 9 and even Opera 10 and can be turned on or off from within Opera. <a href="http://www.useragentstring.com/pages/Opera/" rel="nofollow noreferrer">See this page</a>.

A common approach I've seen is to test for "MSIE" and against "Opera". For example,

<pre><code>if (preg_match('/\bmsie 6/i', $ua) &amp;&amp; !preg_match('/\bopera/i', $ua))
 echo "We have IE6!";
</code></pre>

blocks|key|4567211|text|好吧PHLAK..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4567212|我认为这个要好得多：|4567213|++if(preg_match('/msie+[2-6]/i',$_SERVER['HTTP_USER_AGENT']))+{
+++//+if+IE<=6
++}+else+{
+++//if+IE>6
++}|code-block|syntax|javascript|4567214|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

well PHLAK...

i think this one is much better :P

<pre><code> if(preg_match('/msie [2-6]/i',$_SERVER['HTTP_USER_AGENT'])) {
 // if IE&lt;=6
 } else {
 //if IE&gt;6
 }
</code></pre>

blocks|key|3722157|text|您可以在updated+browscap.ini+file中使用get_browser。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3722158|entityMap|0|LINK|mutability|MUTABLE|url|http://browsers.garykeith.com/downloads.asp|1|http://php.net/get_browser^0|4|P|0|W|B|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You can use <a href="http://php.net/get_browser" rel="nofollow noreferrer">get_browser</a> with <a href="http://browsers.garykeith.com/downloads.asp" rel="nofollow noreferrer">updated browscap.ini file</a>.

blocks|key|1117260|text|就像其他人说的那样，仅仅通过检查用户代理就会出现错误。那么为什么不在、用户代理检查和条件注释中使用呢？|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1117261|例如..。|1117262|<?+if+(preg_match('/\bmsie+6/i',+$_SERVER['HTTP_USER_AGENT'])+{+?>
++
<?+}+?>|code-block|syntax|javascript|1117263|这样你就不会把这些不必要的代码发回给大多数浏览器了。但在出现假阳性的情况下仍然是安全的。|1117264|entityMap^0|1D|2|0|0|5|0|0|0|18|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

Like everyone else said, there will be false positives by just checking the user agent... so why not use both, user agent checking and a conditional comment.

for example...

<pre><code>&lt;? if (preg_match('/\bmsie 6/i', $_SERVER['HTTP_USER_AGENT']) { ?&gt;
 &lt;!--[if IE 6]&gt;
 // ie6 only stuff here
 &lt;![endif]--&gt;
&lt;? } ?&gt;
</code></pre>

This way you won't be sending back this unnecessary code to most browsers... but will still be safe in case of a false positive.

blocks|key|4567098|text|您可以使用HTTP+User-Agent头，但我强烈建议如果可能的话，不要这么做。User-Agent头很难准确解析，甚至忽略了浏览器冒充其他浏览器的问题，而且容易出现简单的字符串匹配 - 的误报。例如Jeremy的“MSIE+6”。字符串将与IE+Mobile匹配，这与IE6非常不同，因此您通常不想将它们合并在一起。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4567099|另外，当你将不同的HTML发送到不同的浏览器时，你必须使用‘Vary’头(这会降低缓存的效率)，以避免缓存将错误的页面发送到不同的浏览器。|4567100|因此，如果你能找到另一个地方来做浏览器的差异化，那绝对是最好的。lafur使用条件注释的方法通常是更改JavaScript和HTML+markup/CSS链接的最简单方法。|4567101|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

You can, using the HTTP User-Agent header, but I'd strongly advise not doing that if possible. The User-Agent header is very very difficult to parse accurately, and tends towards false positives with simple string matching — even ignoring the issue of browsers that pretend to be other browsers. For example Jeremy's “MSIE 6.” string will match IE Mobile, which is so very different from IE6 that you generally don't want to conflate them.

Plus when you send different HTML to different browsers, you have to use the ‘Vary’ header (which makes caches less effective) to avoid that caches send the wrong pages to different browsers.

So if you can find another place to do the browser differentiation that's definitely best. Ólafur's approach with conditional comments is usually the simplest approach for changing JavaScript and HTML markup/CSS links.

blocks|key|502428|text|您可以在许多浏览器上使用它，但它很耗时，有时还会出现误报……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|502429|function+do_stylesheet_link()+{
//+Picks+up+appropriate+css+file+depending+on+the+user-agent

//++if+(+stristr($_SERVER['HTTP_USER_AGENT'],+'Firefox')+)+{
//echo+'<link+rel="stylesheet"+href="css/firefox.css"+type="text/css"+/>';+}++++

//elseif+(+stristr($_SERVER['HTTP_USER_AGENT'],+'Chrome')+)+{
//echo+'<link+rel="stylesheet"+href="css/chrome.css"+type="text/css"+/>';+}

//elseif+(+stristr($_SERVER['HTTP_USER_AGENT'],+'Safari')+)+{
//echo+'<link+rel="stylesheet"+href="css/safari.css"+type="text/css"+/>';+}

//elseif+(+stristr($_SERVER['HTTP_USER_AGENT'],+'Opera')+)+{
//echo+'<link+rel="stylesheet"+href="css/opera.css"+type="text/css"+/>';+}

++++if+(+stristr($_SERVER['HTTP_USER_AGENT'],+'MSIE+6.')+)++{
echo+'<link+rel="stylesheet"+href="css/ie6.css"+type="text/css"+/>';+}

elseif+(+stristr($_SERVER['HTTP_USER_AGENT'],+'MSIE+7.')+)+{
echo+'<link+rel="stylesheet"+href="css/ie7.css"+type="text/css"+/>';+}

elseif+(+stristr($_SERVER['HTTP_USER_AGENT'],+'MSIE+8.')+)+{
echo+'<link+rel="stylesheet"+href="css/ie8.css"+type="text/css"+/>';+}

else+{
echo+'<link+rel="stylesheet"+href="css/style.css"+type="text/css"+/>';
}|code-block|syntax|javascript|502430|}|502431|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can use it for many browsers, but it is time consuming and sometimes false positive...

<pre><code>function do_stylesheet_link() {
// Picks up appropriate css file depending on the user-agent

// if ( stristr($_SERVER['HTTP_USER_AGENT'], 'Firefox') ) {
//echo '&lt;link rel="stylesheet" href="css/firefox.css" type="text/css" /&gt;'; } 

//elseif ( stristr($_SERVER['HTTP_USER_AGENT'], 'Chrome') ) {
//echo '&lt;link rel="stylesheet" href="css/chrome.css" type="text/css" /&gt;'; }

//elseif ( stristr($_SERVER['HTTP_USER_AGENT'], 'Safari') ) {
//echo '&lt;link rel="stylesheet" href="css/safari.css" type="text/css" /&gt;'; }

//elseif ( stristr($_SERVER['HTTP_USER_AGENT'], 'Opera') ) {
//echo '&lt;link rel="stylesheet" href="css/opera.css" type="text/css" /&gt;'; }

 if ( stristr($_SERVER['HTTP_USER_AGENT'], 'MSIE 6.') ) {
echo '&lt;link rel="stylesheet" href="css/ie6.css" type="text/css" /&gt;'; }

elseif ( stristr($_SERVER['HTTP_USER_AGENT'], 'MSIE 7.') ) {
echo '&lt;link rel="stylesheet" href="css/ie7.css" type="text/css" /&gt;'; }

elseif ( stristr($_SERVER['HTTP_USER_AGENT'], 'MSIE 8.') ) {
echo '&lt;link rel="stylesheet" href="css/ie8.css" type="text/css" /&gt;'; }

else {
echo '&lt;link rel="stylesheet" href="css/style.css" type="text/css" /&gt;';
}
</code></pre>

}

blocks|key|1111982|text|if(substr($_SERVER['HTTP_USER_AGENT'],0,34)=="Mozilla/4.0+(compatible;+MSIE+6.0;")+++echo+"I+am+stupid+IE6";|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1111983|IE6总是以"Mozilla/4.0+(compatible；MSIE6.0；“IE7，8)开头，中间有”MSIE6“...|1111984|entityMap^0|0|30|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

<code>if(substr($_SERVER['HTTP_USER_AGENT'],0,34)=="Mozilla/4.0 (compatible; MSIE 6.0;")
 echo "I am stupid IE6";</code>

IE 6 Always starts with "Mozilla/4.0 (compatible; MSIE 6.0;"
IE 7,8 have "MSIE 6" in the middle...

blocks|key|502179|text|感谢各位，我最终创建了以下函数并根据需要调用它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|502180|//+IE6+Check
function+isIE()+{
++$userAgent+=+strtolower($_SERVER['HTTP_USER_AGENT']);
++if+(ereg("msie+6.0",+$userAgent))+{
++++return+true;
++}+else+{
++++return+false;
++}
}|code-block|syntax|javascript|502181|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Thanks guys, I ended up creating the following function and calling it as needed:

<pre><code>// IE6 Check
function isIE() {
 $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);
 if (ereg("msie 6.0", $userAgent)) {
 return true;
 } else {
 return false;
 }
}
</code></pre>

blocks|key|3722481|text|列出的方法通常会标记带有某些插件的浏览器(例如，MathPlayer；以及一些恶意软件工具栏)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3722482|我发现一个更可靠的方法是：|3722483|if(+preg_match('/%5EMozilla\/4\.0+\(compatible;+MSIE+6/',+$_SERVER['HTTP_USER_AGENT'])+!=+0+)|code-block|syntax|javascript|3722484|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The methods listed will often flag browsers with certain plug-ins (MathPlayer, for instance; as well as some malware toolbars).

I find a much more reliable method is:

<pre><code>if( preg_match('/^Mozilla\/4\.0 \(compatible; MSIE 6/', $_SERVER['HTTP_USER_AGENT']) != 0 )
</code></pre>

blocks|key|1111914|text|更简单的东西：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1111915|if(stristr(strtolower($_SERVER['HTTP_USER_AGENT']),+"msie+6.0"))+{
++++//+IE6?+Aren't+you+out+of+fashion+yet?
}|code-block|syntax|javascript|1111916|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Something simpler:

<pre><code>if(stristr(strtolower($_SERVER['HTTP_USER_AGENT']), "msie 6.0")) {
 // IE6? Aren't you out of fashion yet?
}
</code></pre>

blocks|key|4567511|text|function+isIE($versions=array())+{
++++if+(!empty($versions))
++++++++$versions+=+'('.implode('%7C',$versions).')';
++++else
++++++++$versions+=+'1?\d';
++++$ua+=+$_SERVER['HTTP_USER_AGENT'];
++++$is_not_opera+=+false===stripos($ua,+'opera');
++++return+$is_not_opera+&&+preg_match('/\bmsie+'.$versions.'\./i',+$ua);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4567512|使用：|unstyled|4567513|$is_ie+=+isIE();+//Any+version
$is_ie_7+=+isIE(array(7));+//IE+7
$is_old_id+=+isIE(array(6,7));//IE+7+and+8|4567514|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>function isIE($versions=array()) {
 if (!empty($versions))
 $versions = '('.implode('|',$versions).')';
 else
 $versions = '1?\d';
 $ua = $_SERVER['HTTP_USER_AGENT'];
 $is_not_opera = false===stripos($ua, 'opera');
 return $is_not_opera &amp;&amp; preg_match('/\bmsie '.$versions.'\./i', $ua);
}
</code></pre>

Using:

<pre><code>$is_ie = isIE(); //Any version
$is_ie_7 = isIE(array(7)); //IE 7
$is_old_id = isIE(array(6,7));//IE 7 and 8
</code></pre>

blocks|key|3722445|text|非常有用的帖子。我用它来隐藏IE6的<?xml>声明。原来IE6只检查文档的第一行文档类型嗅探，这意味着如果存在<?xml>字符串，IE6将以怪异模式呈现，而不管<?xml>声明后面的文档类型是什么|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3722446|我还不确定是否需要包含一项opera检查，但我已经将其包含在内。|3722447|//check+if+IE+6+or+less
$not_lte_ie6+=+true;
$ua+=+strtolower($_SERVER['HTTP_USER_AGENT']);
if(strpos($ua,'msie')+!==+FALSE)+{
++++if(strpos($ua,'opera')+===+FALSE)+{
++++++++if(preg_match('/(?i)msie+[1-6]/',$ua))+$not_lte_ie6+=+false;
++++}
}
if+($not_lte_ie6)
++++echo+"<?xml+version='1.0'+encoding='UTF-8'?>\n";|code-block|syntax|javascript|3722448|entityMap^0|I|6|1K|6|29|6|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

very helpful thread. I used this to hide the <code>&lt;?xml&gt;</code> declaration for IE6. Turns out IE6 only checks the first line of the document for doctype sniffing, which means that if the <code>&lt;?xml&gt;</code> string is present, IE6 will render in quirks mode regardless of the doctype following the <code>&lt;?xml&gt;</code> declaration

I'm not sure if its critical to include an opera check yet, but have included it anyway.

<pre><code>//check if IE 6 or less
$not_lte_ie6 = true;
$ua = strtolower($_SERVER['HTTP_USER_AGENT']);
if(strpos($ua,'msie') !== FALSE) {
 if(strpos($ua,'opera') === FALSE) {
 if(preg_match('/(?i)msie [1-6]/',$ua)) $not_lte_ie6 = false;
 }
}
if ($not_lte_ie6)
 echo "&lt;?xml version='1.0' encoding='UTF-8'?&gt;\n";
</code></pre>

blocks|key|3722585|text|function+isOldIE()+{
++++//+don't+support+IE6+or+below
++++return+preg_match('/MSIE+[1-6]/',+$_SERVER['HTTP_USER_AGENT']);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3722586|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>function isOldIE() {
 // don't support IE6 or below
 return preg_match('/MSIE [1-6]/', $_SERVER['HTTP_USER_AGENT']);
}
</code></pre>

blocks|key|4567221|text|函数是preg_match()而不是preg()，但是很好！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4567222|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Function is preg_match() instead of preg(), but good !

blocks|key|3722418|text|注IE8还在其用户代理字符串中指定它与IE6兼容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3722419|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Note IE8 also specifies that it is IE6 compatible in its user-agent string.

Is there a way to use PHP to detect if the page is being loaded using IE6?

Can I detect IE6 with PHP?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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功能1上新10个字符

功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符。

功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符。

功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符

功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符

功能4上新

文章&问答评论现已支持表情

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社区富文本编辑器全新改版！诚邀体验～ 

精选全网热门MCP server，让你的AI更好用 🚀

💥开发者 MCP广场重磅上线！

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

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社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

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有没有办法用PHP来检测页面是不是通过IE6加载的？

问我能用PHP检测IE6吗？
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回答 16

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问我能用PHP检测IE6吗？
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