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diff --git a/admin/survey/minify/lib/HTTP/Encoder.php b/admin/survey/minify/lib/HTTP/Encoder.php
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+++ b/admin/survey/minify/lib/HTTP/Encoder.php
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+<?php

+/**

+ * Class HTTP_Encoder

+ * @package Minify

+ * @subpackage HTTP

+ */

+

+/**

+ * Encode and send gzipped/deflated content

+ *

+ * The "Vary: Accept-Encoding" header is sent. If the client allows encoding,

+ * Content-Encoding and Content-Length are added.

+ *

+ * <code>

+ * // Send a CSS file, compressed if possible

+ * $he = new HTTP_Encoder(array(

+ *     'content' => file_get_contents($cssFile)

+ *     ,'type' => 'text/css'

+ * ));

+ * $he->encode();

+ * $he->sendAll();

+ * </code>

+ *

+ * <code>

+ * // Shortcut to encoding output

+ * header('Content-Type: text/css'); // needed if not HTML

+ * HTTP_Encoder::output($css);

+ * </code>

+ *

+ * <code>

+ * // Just sniff for the accepted encoding

+ * $encoding = HTTP_Encoder::getAcceptedEncoding();

+ * </code>

+ *

+ * For more control over headers, use getHeaders() and getData() and send your

+ * own output.

+ *

+ * Note: If you don't need header mgmt, use PHP's native gzencode, gzdeflate,

+ * and gzcompress functions for gzip, deflate, and compress-encoding

+ * respectively.

+ *

+ * @package Minify

+ * @subpackage HTTP

+ * @author Stephen Clay <steve@mrclay.org>

+ */

+class HTTP_Encoder

+{

+

+    /**

+     * Should the encoder allow HTTP encoding to IE6?

+     *

+     * If you have many IE6 users and the bandwidth savings is worth troubling

+     * some of them, set this to true.

+     *

+     * By default, encoding is only offered to IE7+. When this is true,

+     * getAcceptedEncoding() will return an encoding for IE6 if its user agent

+     * string contains "SV1". This has been documented in many places as "safe",

+     * but there seem to be remaining, intermittent encoding bugs in patched

+     * IE6 on the wild web.

+     *

+     * @var bool

+     */

+    public static $encodeToIe6 = true;

+

+    /**

+     * Default compression level for zlib operations

+     *

+     * This level is used if encode() is not given a $compressionLevel

+     *

+     * @var int

+     */

+    public static $compressionLevel = 6;

+

+    /**

+     * Get an HTTP Encoder object

+     *

+     * @param array $spec options

+     *

+     * 'content': (string required) content to be encoded

+     *

+     * 'type': (string) if set, the Content-Type header will have this value.

+     *

+     * 'method: (string) only set this if you are forcing a particular encoding

+     * method. If not set, the best method will be chosen by getAcceptedEncoding()

+     * The available methods are 'gzip', 'deflate', 'compress', and '' (no

+     * encoding)

+     */

+    public function __construct($spec)

+    {

+        $this->_useMbStrlen = (function_exists('mb_strlen')

+                               && (ini_get('mbstring.func_overload') !== '')

+                               && ((int)ini_get('mbstring.func_overload') & 2));

+        $this->_content = $spec['content'];

+        $this->_headers['Content-Length'] = $this->_useMbStrlen

+            ? (string)mb_strlen($this->_content, '8bit')

+            : (string)strlen($this->_content);

+        if (isset($spec['type'])) {

+            $this->_headers['Content-Type'] = $spec['type'];

+        }

+        if (isset($spec['method'])

+            && in_array($spec['method'], array('gzip', 'deflate', 'compress', ''))) {

+            $this->_encodeMethod = array($spec['method'], $spec['method']);

+        } else {

+            $this->_encodeMethod = self::getAcceptedEncoding();

+        }

+    }

+

+    /**

+     * Get content in current form

+     *

+     * Call after encode() for encoded content.

+     *

+     * @return string

+     */

+    public function getContent()

+    {

+        return $this->_content;

+    }

+

+    /**

+     * Get array of output headers to be sent

+     *

+     * E.g.

+     * <code>

+     * array(

+     *     'Content-Length' => '615'

+     *     ,'Content-Encoding' => 'x-gzip'

+     *     ,'Vary' => 'Accept-Encoding'

+     * )

+     * </code>

+     *

+     * @return array

+     */

+    public function getHeaders()

+    {

+        return $this->_headers;

+    }

+

+    /**

+     * Send output headers

+     *

+     * You must call this before headers are sent and it probably cannot be

+     * used in conjunction with zlib output buffering / mod_gzip. Errors are

+     * not handled purposefully.

+     *

+     * @see getHeaders()

+     */

+    public function sendHeaders()

+    {

+        foreach ($this->_headers as $name => $val) {

+            header($name . ': ' . $val);

+        }

+    }

+

+    /**

+     * Send output headers and content

+     *

+     * A shortcut for sendHeaders() and echo getContent()

+     *

+     * You must call this before headers are sent and it probably cannot be

+     * used in conjunction with zlib output buffering / mod_gzip. Errors are

+     * not handled purposefully.

+     */

+    public function sendAll()

+    {

+        $this->sendHeaders();

+        echo $this->_content;

+    }

+

+    /**

+     * Determine the client's best encoding method from the HTTP Accept-Encoding

+     * header.

+     *

+     * If no Accept-Encoding header is set, or the browser is IE before v6 SP2,

+     * this will return ('', ''), the "identity" encoding.

+     *

+     * A syntax-aware scan is done of the Accept-Encoding, so the method must

+     * be non 0. The methods are favored in order of gzip, deflate, then

+     * compress. Deflate is always smallest and generally faster, but is

+     * rarely sent by servers, so client support could be buggier.

+     *

+     * @param bool $allowCompress allow the older compress encoding

+     *

+     * @param bool $allowDeflate allow the more recent deflate encoding

+     *

+     * @return array two values, 1st is the actual encoding method, 2nd is the

+     * alias of that method to use in the Content-Encoding header (some browsers

+     * call gzip "x-gzip" etc.)

+     */

+    public static function getAcceptedEncoding($allowCompress = true, $allowDeflate = true)

+    {

+        // @link http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

+

+        if (! isset($_SERVER['HTTP_ACCEPT_ENCODING'])

+            || self::isBuggyIe()) {

+            return array('', '');

+        }

+        $ae = $_SERVER['HTTP_ACCEPT_ENCODING'];

+        // gzip checks (quick)

+        if (0 === strpos($ae, 'gzip,')             // most browsers

+            || 0 === strpos($ae, 'deflate, gzip,') // opera

+        ) {

+            return array('gzip', 'gzip');

+        }

+        // gzip checks (slow)

+        if (preg_match(

+                '@(?:^|,)\\s*((?:x-)?gzip)\\s*(?:$|,|;\\s*q=(?:0\\.|1))@'

+                ,$ae

+                ,$m)) {

+            return array('gzip', $m[1]);

+        }

+        if ($allowDeflate) {

+            // deflate checks

+            $aeRev = strrev($ae);

+            if (0 === strpos($aeRev, 'etalfed ,') // ie, webkit

+                || 0 === strpos($aeRev, 'etalfed,') // gecko

+                || 0 === strpos($ae, 'deflate,') // opera

+                // slow parsing

+                || preg_match(

+                    '@(?:^|,)\\s*deflate\\s*(?:$|,|;\\s*q=(?:0\\.|1))@', $ae)) {

+                return array('deflate', 'deflate');

+            }

+        }

+        if ($allowCompress && preg_match(

+                '@(?:^|,)\\s*((?:x-)?compress)\\s*(?:$|,|;\\s*q=(?:0\\.|1))@'

+                ,$ae

+                ,$m)) {

+            return array('compress', $m[1]);

+        }

+

+        return array('', '');

+    }

+

+    /**

+     * Encode (compress) the content

+     *

+     * If the encode method is '' (none) or compression level is 0, or the 'zlib'

+     * extension isn't loaded, we return false.

+     *

+     * Then the appropriate gz_* function is called to compress the content. If

+     * this fails, false is returned.

+     *

+     * The header "Vary: Accept-Encoding" is added. If encoding is successful,

+     * the Content-Length header is updated, and Content-Encoding is also added.

+     *

+     * @param int $compressionLevel given to zlib functions. If not given, the

+     * class default will be used.

+     *

+     * @return bool success true if the content was actually compressed

+     */

+    public function encode($compressionLevel = null)

+    {

+        if (! self::isBuggyIe()) {

+            $this->_headers['Vary'] = 'Accept-Encoding';

+        }

+        if (null === $compressionLevel) {

+            $compressionLevel = self::$compressionLevel;

+        }

+        if ('' === $this->_encodeMethod[0]

+            || ($compressionLevel == 0)

+            || !extension_loaded('zlib')) {

+            return false;

+        }

+        if ($this->_encodeMethod[0] === 'deflate') {

+            $encoded = gzdeflate($this->_content, $compressionLevel);

+        } elseif ($this->_encodeMethod[0] === 'gzip') {

+            $encoded = gzencode($this->_content, $compressionLevel);

+        } else {

+            $encoded = gzcompress($this->_content, $compressionLevel);

+        }

+        if (false === $encoded) {

+            return false;

+        }

+        $this->_headers['Content-Length'] = $this->_useMbStrlen

+            ? (string)mb_strlen($encoded, '8bit')

+            : (string)strlen($encoded);

+        $this->_headers['Content-Encoding'] = $this->_encodeMethod[1];

+        $this->_content = $encoded;

+

+        return true;

+    }

+

+    /**

+     * Encode and send appropriate headers and content

+     *

+     * This is a convenience method for common use of the class

+     *

+     * @param string $content

+     *

+     * @param int $compressionLevel given to zlib functions. If not given, the

+     * class default will be used.

+     *

+     * @return bool success true if the content was actually compressed

+     */

+    public static function output($content, $compressionLevel = null)

+    {

+        if (null === $compressionLevel) {

+            $compressionLevel = self::$compressionLevel;

+        }

+        $he = new HTTP_Encoder(array('content' => $content));

+        $ret = $he->encode($compressionLevel);

+        $he->sendAll();

+

+        return $ret;

+    }

+

+    /**

+     * Is the browser an IE version earlier than 6 SP2?

+     *

+     * @return bool

+     */

+    public static function isBuggyIe()

+    {

+        if (empty($_SERVER['HTTP_USER_AGENT'])) {

+            return false;

+        }

+        $ua = $_SERVER['HTTP_USER_AGENT'];

+        // quick escape for non-IEs

+        if (0 !== strpos($ua, 'Mozilla/4.0 (compatible; MSIE ')

+            || false !== strpos($ua, 'Opera')) {

+            return false;

+        }

+        // no regex = faaast

+        $version = (float)substr($ua, 30);

+

+        return self::$encodeToIe6

+            ? ($version < 6 || ($version == 6 && false === strpos($ua, 'SV1')))

+            : ($version < 7);

+    }

+

+    protected $_content = '';

+    protected $_headers = array();

+    protected $_encodeMethod = array('', '');

+    protected $_useMbStrlen = false;

+}