blocks|key|1519957|text|我的库中的一小段代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1519958|function+getBestSupportedMimeType($mimeTypes+=+null)+{
++++//+Values+will+be+stored+in+this+array
++++$AcceptTypes+=+Array+();

++++//+Accept+header+is+case+insensitive,+and+whitespace+isn’t+important
++++$accept+=+strtolower(str_replace('+',+'',+$_SERVER['HTTP_ACCEPT']));
++++//+divide+it+into+parts+in+the+place+of+a+","
++++$accept+=+explode(',',+$accept);
++++foreach+($accept+as+$a)+{
++++++++//+the+default+quality+is+1.
++++++++$q+=+1;
++++++++//+check+if+there+is+a+different+quality
++++++++if+(strpos($a,+';q='))+{
++++++++++++//+divide+"mime/type;q=X"+into+two+parts:+"mime/type"+i+"X"
++++++++++++list($a,+$q)+=+explode(';q=',+$a);
++++++++}
++++++++//+mime-type+$a+is+accepted+with+the+quality+$q
++++++++//+WARNING:+$q+==+0+means,+that+mime-type+isn’t+supported!
++++++++$AcceptTypes[$a]+=+$q;
++++}
++++arsort($AcceptTypes);

++++//+if+no+parameter+was+passed,+just+return+parsed+data
++++if+(!$mimeTypes)+return+$AcceptTypes;

++++$mimeTypes+=+array_map('strtolower',+(array)$mimeTypes);

++++//+let’s+check+our+supported+types:
++++foreach+($AcceptTypes+as+$mime+=>+$q)+{
+++++++if+($q+&&+in_array($mime,+$mimeTypes))+return+$mime;
++++}
++++//+no+mime-type+found
++++return+null;
}|code-block|syntax|javascript|1519959|示例用法：|1519960|$mime+=+getBestSupportedMimeType(Array+('application/xhtml%2Bxml',+'text/html'));|1519961|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Little snippet from my library:

<pre><code>function getBestSupportedMimeType($mimeTypes = null) {
 // Values will be stored in this array
 $AcceptTypes = Array ();

 // Accept header is case insensitive, and whitespace isn’t important
 $accept = strtolower(str_replace(' ', '', $_SERVER['HTTP_ACCEPT']));
 // divide it into parts in the place of a ","
 $accept = explode(',', $accept);
 foreach ($accept as $a) {
 // the default quality is 1.
 $q = 1;
 // check if there is a different quality
 if (strpos($a, ';q=')) {
 // divide "mime/type;q=X" into two parts: "mime/type" i "X"
 list($a, $q) = explode(';q=', $a);
 }
 // mime-type $a is accepted with the quality $q
 // WARNING: $q == 0 means, that mime-type isn’t supported!
 $AcceptTypes[$a] = $q;
 }
 arsort($AcceptTypes);

 // if no parameter was passed, just return parsed data
 if (!$mimeTypes) return $AcceptTypes;

 $mimeTypes = array_map('strtolower', (array)$mimeTypes);

 // let’s check our supported types:
 foreach ($AcceptTypes as $mime =&gt; $q) {
 if ($q &amp;&amp; in_array($mime, $mimeTypes)) return $mime;
 }
 // no mime-type found
 return null;
}
</code></pre>

example usage:

<pre><code>$mime = getBestSupportedMimeType(Array ('application/xhtml+xml', 'text/html'));
</code></pre>

blocks|key|1520023|text|根据记录，Negotiation是一个用于处理内容协商的纯PHP实现。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1520024|entityMap|0|LINK|mutability|MUTABLE|url|http://williamdurand.fr/Negotiation/^0|5|B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Just for the record, <a href="http://williamdurand.fr/Negotiation/">Negotiation</a> is a pure PHP implementation for dealing with content negotiation.

blocks|key|1305042|text|合并了@maciej-Łebkowski和@chacham15+15解决方案，以及我的问题、修复和改进。如果您传递$desiredTypes+=+'text/*'并且Accept包含text/html;q=1，则将返回text/html。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1305043|/**
+*+Parse,+sort+and+select+best+Content-type,+supported+by+a+user+browser.
+*
+*+@param+string%7Cstring[]+$desiredTypes+The+filter+of+desired+types.+If+&null+then+the+all+supported+types+will+returned.
+*+@param+string+$acceptRules+Supported+types+in+the+HTTP+Accept+header+format.+$_SERVER['HTTP_ACCEPT']+by+default.
+*+@return+string%7Cstring[]%7Cnull+Matched+by+$desiredTypes+type+or+all+accepted+types.
+*+@link+Inspired+by+http://stackoverflow.com/a/1087498/3155344
+*/
function+resolveContentNegotiation($desiredTypes+=+null,+$acceptRules+=+null)
{
++++if+(!$acceptRules)+{
++++++++$acceptRules+=+@$_SERVER['HTTP_ACCEPT'];
++++}
++++//+Accept+header+is+case+insensitive,+and+whitespace+isn't+important.
++++$acceptRules+=+strtolower(str_replace('+',+'',+$acceptRules));

++++$sortedAcceptTypes+=+array();
++++foreach+(explode(',',+$acceptRules)+as+$acceptRule)+{
++++++++$q+=+1;+//+the+default+accept+quality+(rating).
++++++++//+Check+if+there+is+a+different+quality.
++++++++if+(strpos($acceptRule,+';q=')+!==+false)+{
++++++++++++//+Divide+"type;q=X"+into+two+parts:+"type"+and+"X"
++++++++++++list($acceptRule,+$q)+=+explode(';q=',+$acceptRule,+2);
++++++++}
++++++++$sortedAcceptTypes[$acceptRule]+=+$q;
++++}
++++//+WARNING:+zero+quality+is+means,+that+type+isn't+supported!+Thus+remove+them.
++++$sortedAcceptTypes+=+array_filter($sortedAcceptTypes);
++++arsort($sortedAcceptTypes,+SORT_NUMERIC);

++++//+If+no+parameter+was+passed,+just+return+parsed+data.
++++if+(!$desiredTypes)+{
++++++++return+$sortedAcceptTypes;
++++}

++++$desiredTypes+=+array_map('strtolower',+(array)+$desiredTypes);

++++//+Let's+check+our+supported+types.
++++foreach+(array_keys($sortedAcceptTypes)+as+$type)+{
++++++++foreach+($desiredTypes+as+$desired)+{
++++++++++++if+(fnmatch($desired,+$type))+{
++++++++++++++++return+$type;
++++++++++++}
++++++++}
++++}

++++//+No+matched+type.
++++return+null;
}|code-block|syntax|javascript|1305044|entityMap^0|1L|O|2B|6|2J|D|31|9|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|L|$]]

Merged @maciej-Łebkowski and @chacham15 solutions with my issues fixes and improvements. If you pass <code>$desiredTypes = 'text/*'</code> and <code>Accept</code> contains <code>text/html;q=1</code> then <code>text/html</code> will be returned.

<pre class="lang-php prettyprint-override"><code>/**
 * Parse, sort and select best Content-type, supported by a user browser.
 *
 * @param string|string[] $desiredTypes The filter of desired types. If &amp;null then the all supported types will returned.
 * @param string $acceptRules Supported types in the HTTP Accept header format. $_SERVER['HTTP_ACCEPT'] by default.
 * @return string|string[]|null Matched by $desiredTypes type or all accepted types.
 * @link Inspired by http://stackoverflow.com/a/1087498/3155344
 */
function resolveContentNegotiation($desiredTypes = null, $acceptRules = null)
{
 if (!$acceptRules) {
 $acceptRules = @$_SERVER['HTTP_ACCEPT'];
 }
 // Accept header is case insensitive, and whitespace isn't important.
 $acceptRules = strtolower(str_replace(' ', '', $acceptRules));

 $sortedAcceptTypes = array();
 foreach (explode(',', $acceptRules) as $acceptRule) {
 $q = 1; // the default accept quality (rating).
 // Check if there is a different quality.
 if (strpos($acceptRule, ';q=') !== false) {
 // Divide "type;q=X" into two parts: "type" and "X"
 list($acceptRule, $q) = explode(';q=', $acceptRule, 2);
 }
 $sortedAcceptTypes[$acceptRule] = $q;
 }
 // WARNING: zero quality is means, that type isn't supported! Thus remove them.
 $sortedAcceptTypes = array_filter($sortedAcceptTypes);
 arsort($sortedAcceptTypes, SORT_NUMERIC);

 // If no parameter was passed, just return parsed data.
 if (!$desiredTypes) {
 return $sortedAcceptTypes;
 }

 $desiredTypes = array_map('strtolower', (array) $desiredTypes);

 // Let's check our supported types.
 foreach (array_keys($sortedAcceptTypes) as $type) {
 foreach ($desiredTypes as $desired) {
 if (fnmatch($desired, $type)) {
 return $type;
 }
 }
 }

 // No matched type.
 return null;
}
</code></pre>

blocks|key|1305114|text|PEAR's+HTTP2+library支持解析所有类型的Accept标头。它可以通过composer和PEAR安装。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1305115|示例可以在documentation或my+blog+post上找到。|1305116|entityMap|0|LINK|mutability|MUTABLE|url|http://pear.php.net/package/HTTP2|1|https://packagist.org/packages/pear/http2|2|http://pear.php.net/manual/en/package.http.http2.negotiatelanguage.php|3|http://cweiske.de/tagebuch/php-http-negotiation.htm^0|T|6|0|K|0|17|8|1|0|5|D|2|J|C|3|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]|$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]|$9|18|A|19|1|1A]]|E|$]]|$1|H|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]|P|$5|K|L|M|E|$N|Q]]|R|$5|K|L|M|E|$N|S]]|T|$5|K|L|M|E|$N|U]]]]

<a href="http://pear.php.net/package/HTTP2" rel="nofollow">PEAR's HTTP2 library</a> supports parsing all types of <code>Accept</code> headers. It's installable via <a href="https://packagist.org/packages/pear/http2" rel="nofollow">composer</a> and PEAR.

Examples can be found at the <a href="http://pear.php.net/manual/en/package.http.http2.negotiatelanguage.php" rel="nofollow">documentation</a> or <a href="http://cweiske.de/tagebuch/php-http-negotiation.htm" rel="nofollow">my blog post</a>.

blocks|key|1305152|text|客户端可以接受响应中的mime类型列表。另一方面，响应的顺序对于客户端来说非常重要。PHP+Pear+HTTP2是处理语言、字符集和mimetype的最佳工具。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1305153|$http+=+new+HTTP2();
$supportedTypes+=+array(
++++'text/html',
++++'application/json'
);

$type+=+$http->negotiateMimeType($supportedTypes,+false);
if+($type+===+false)+{
++++header('HTTP/1.1+406+Not+Acceptable');
++++echo+"You+don't+want+any+of+the+content+types+I+have+to+offer\n";
}+else+{
++++echo+'I\'d+give+you+data+of+type:+'+.+$type+.+"\n";
}|code-block|syntax|javascript|1305154|这里有一个很好的教程：https://cweiske.de/tagebuch/php-http-negotiation.htm|1305155|entityMap|0|LINK|mutability|MUTABLE|url|http://pear.php.net/package/HTTP2/docs/1.1.2/HTTP2/HTTP2.html|1|https://cweiske.de/tagebuch/php-http-negotiation.htm^0|16|E|0|0|0|B|1G|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

Client may accept a list of mime-types in the response. In the other hand the order of the response is very important for client side. <a href="http://pear.php.net/package/HTTP2/docs/1.1.2/HTTP2/HTTP2.html" rel="nofollow noreferrer">PHP Pear HTTP2</a> is the best to deal with language, charset, and mimetypes.

<pre><code>$http = new HTTP2();
$supportedTypes = array(
 'text/html',
 'application/json'
);

$type = $http-&gt;negotiateMimeType($supportedTypes, false);
if ($type === false) {
 header('HTTP/1.1 406 Not Acceptable');
 echo "You don't want any of the content types I have to offer\n";
} else {
 echo 'I\'d give you data of type: ' . $type . "\n";
}
</code></pre>

Here is a good tutorial: <a href="https://cweiske.de/tagebuch/php-http-negotiation.htm" rel="nofollow noreferrer">https://cweiske.de/tagebuch/php-http-negotiation.htm</a>

I'm trying to build a standard compliant website framework which serves XHTML 1.1 as application/xhtml+xml or HTML 4.01 as text/html depending on the browser support. Currently it just looks for "application/xhtml+xml" anywhere in the accept header, and uses that if it exists, but that's not flexible - text/html might have a higher score. Also, it will become more complex when other formats (WAP, SVG, XForms etc.) are added. So, does anyone know of a tried and tested piece of PHP code to select, from a string array given by the server, either the one best supported by the client or an ordered list based on the client score?

How to select content type from HTTP Accept header in PHP

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我正在尝试构建一个符合标准的网站框架，它将XHTML1.1作为application/ XHTML +xml或HTML4.01作为text/html，这取决于浏览器的支持。目前，它只是在accept头中的任何地方查找"application/xhtml+xml“，如果它存在，就使用它，但这并不灵活- text/html...

问如何在PHP中选择HTTP Accept头中的内容类型
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