PHP 如果支持，发送适当的mimetype和doctype
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/* Usage:
If you save this script as 'mimetype.php',
you can include it in a page like this:
<?php include ("mimetype.php"); ?>
<title>My Title</title>
</head>
<body>
</body>
</html>
As you can see, the <html> and <head> tags have already been 'written' for you.
You can also set $charset to another encoding (like 'utf-8').
*/
$charset = "iso-8859-1";
$mime = "text/html";
function fix_code($buffer) {
return (str_replace(" />", ">", $buffer));
}
if(stristr($_SERVER["HTTP_ACCEPT"],"application/xhtml+xml")) {
# if there's a Q value for "application/xhtml+xml" then also
# retrieve the Q value for "text/html"
if(preg_match("/application\/xhtml\+xml;q=0(\.[1-9]+)/i",
$_SERVER["HTTP_ACCEPT"], $matches)) {
$xhtml_q = $matches[1];
if(preg_match("/text\/html;q=0(\.[1-9]+)/i",
$_SERVER["HTTP_ACCEPT"], $matches)) {
$html_q = $matches[1];
# if the Q value for XHTML is greater than or equal to that
# for HTML then use the "application/xhtml+xml" mimetype
if($xhtml_q >= $html_q) {
$mime = "application/xhtml+xml";
}
}
# if there was no Q value, then just use the
# "application/xhtml+xml" mimetype
} else {
$mime = "application/xhtml+xml";
}
}
# special check for the W3C_Validator
if (stristr($_SERVER["HTTP_USER_AGENT"],"W3C_Validator")) {
$mime = "application/xhtml+xml";
}
# set the prolog_type according to the mime type which was determined
if($mime == "application/xhtml+xml") {
if ( (preg_match("/Gecko|W3C_Validator|MathPlayer/", $_SERVER["HTTP_USER_AGENT"])
&& !preg_match("/Chimera|Camino|KHTML/",$_SERVER["HTTP_USER_AGENT"]))
|| preg_match("/Camino.*MathML-Enabled/", $_SERVER["HTTP_USER_AGENT"]) ) {
$prolog_type="<?xml version='1.0' encoding='$charset'?>
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN' 'http://www.w3.org/Math/DTD/mathml2/xhtml-math11-f.dtd' >
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'>
<head profile='http://gmpg.org/xfn/11'>
<meta http-equiv='Content-Type' content='$mime; $charset' />";
} else {
$prolog_type = "<?xml version='1.0' encoding='$charset' ?>
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1//EN' 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'>
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'>
<head profile='http://gmpg.org/xfn/11'>
<meta http-equiv='Content-Type' content='$mime; $charset' />";
}
} else {
ob_start("fix_code");
$prolog_type = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01//EN' 'http://www.w3.org/TR/html4/strict.dtd'>
<html lang='en'>
<head profile='http://gmpg.org/xfn/11'>
<meta http-equiv='Content-Type' content='$mime; charset=$charset' />";
}
# finally, output the mime type and prolog type
header("Content-Type: $mime;charset=$charset");
header("Vary: Accept");
print $prolog_type;以上是关于PHP 如果支持，发送适当的mimetype和doctype的主要内容，如果未能解决你的问题，请参考以下文章
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