PHP detects whether the url page uses gzip compression summary_PHP tutorial

Gzip compression is a very good page compression and transmission method. We often open it on the server side. Such a 100K file may only be less than 20KB after being compressed by gzip. Let me introduce gzip compression detection and Open method.

What if gzip compression is turned on

apache

Step 1

The code is as follows

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代码如下	复制代码
LoadModule deflate_module modules/mod_deflate.so LoadModule headers_module modules/mod_headers.so

LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so

Then add the following example code to http.conf

代码如下	复制代码
# BEGIN GZIP #apache开启gzip压缩，前提要装gzip模块哦 AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript # END GZIP

The code is as follows	Copy code
# BEGIN GZIP #apache enables gzip compression, the prerequisite is to install the gzip module AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript # END GZIP

代码如下	复制代码
#nginx开启gzip压缩，放在location内 gzip on; gzip_min_length 1000; gzip_buffers 4 8k; gzip_http_version 1.1; gzip_types text/text text/html text/plain text/xml  text/css application/x-javascript application/javascript;

If you are an nginx server, you can also refer to the following code

The code is as follows	Copy code
#nginx Enable gzip compression and place it in location gzip on; gzip_min_length 1000; gzip_buffers 4 8k; gzip_http_version 1.1; gzip_types text/text text/html text/plain text/xml text/css application/x-javascript application/javascript;

Now just restart apache or nginx. So how to check whether gzip is turned on correctly? We can use the following php code

代码如下

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//米尔军事网采用 gzip压缩网页 //file_get_contents 直接获得的网页是乱码。 header('Content-Type:text/html;charset=utf-8' ); $url = 'http://www.bKjia.c0m'; $file = fopen($url, "rb");   //只读2字节  如果为(16进制)1f 8b (10进制)31 139则开启了gzip ; $bin = fread($file, 2);  fclose($file);   $strInfo = @unpack("C2chars", $bin);   $typeCode = intval($strInfo['chars1'].$strInfo['chars2']);   $isGzip = 0;   switch ($typeCode)   {     case 31139:             //网站开启了gzip         $isGzip = 1;         break;     default:           $isGzip = 0; }   $url = $isGzip ? "compress.zlib://".$url:$url; // 三元表达式 $mierHtml = file_get_contents($url); //获得米尔军事网数据 $mierHtml = iconv("gbk","utf-8",$mierHtml); echo $mierHtml;

The code is as follows

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//Mire Military Network uses gzip to compress web pages //file_get_contents The web page obtained directly is garbled. header('Content-Type:text/html;charset=utf-8' ); $url = 'http://www.bKjia.c0m'; $file = fopen($url, "rb"); //Read only 2 bytes. If it is (hexadecimal) 1f 8b (decimal) 31 139, gzip is enabled; $bin = fread($file, 2); fclose($file); $strInfo = @unpack("C2chars", $bin); $typeCode = intval($strInfo['chars1'].$strInfo['chars2']); $isGzip = 0; switch ($typeCode) { case 31139: //The website has gzip enabled           $isGzip = 1;           break; Default:           $isGzip = 0; } $url = $isGzip ? "compress.zlib://".$url:$url; // ternary expression $mierHtml = file_get_contents($url); //Get Mier Military Network data $mierHtml = iconv("gbk","utf-8",$mierHtml); echo $mierHtml;

Example 2

The code is as follows

代码如下

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/* php 判断url页面是否使用gzip压缩 */ $ch = curl_init("http://www.hzhuti.com/");//url不能有转向 curl_setopt($ch,CURLOPT_HTTPHEADER,array('Accept-Encoding: gzip, deflate')); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $buffer = curl_exec($ch); $curl_info = curl_getinfo($ch); curl_close($ch); $header_size = $curl_info["header_size"]; //头部信息长度 $headers = substr($buffer, 0, $header_size); //获取头部信息 $body = substr($buffer, $header_size); //获取网页内容   function getEncoding(&$headers){     $arr=explode("rn",trim($headers));     array_shift($arr);     foreach($arr as $header){         list($k,$v)=explode(':',$header);         if ('content-encoding'==strtolower($k)){             return trim($v);         }     }     return false; }      $encoding=getEncoding($headers);   if ($encoding) {     echo "Using: ".$encoding; }else{     echo "None"; }   ?>

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/*
PHP determines whether the url page uses gzip compression
*/
$ch = curl_init("http://www.hzhuti.com/");//URL cannot have redirection
curl_setopt($ch,CURLOPT_HTTPHEADER,array('Accept-Encoding: gzip, deflate'));
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$buffer = curl_exec($ch);
$curl_info = curl_getinfo($ch);
curl_close($ch);
$header_size = $curl_info["header_size"];
//Header information length
$headers = substr($buffer, 0, $header_size);
//Get header information
$body = substr($buffer, $header_size);
//Get web content

function getEncoding(&$headers){
$arr=explode("rn",trim($headers));
Array_shift($arr);
foreach($arr as $header){
        list($k,$v)=explode(':',$header);
If ('content-encoding'==strtolower($k)){
             return trim($v);
           }
}  
Return false;
} 

$encoding=getEncoding($headers);

if ($encoding) {
echo "Using: ".$encoding;
}else{
echo "None";
}

?>

http://www.bkjia.com/PHPjc/632758.htmlwww.bkjia.comtrue

http: //www.bkjia.com/PHPjc/632758.html

TechArticle

Gzip compression is a good page compression and transmission method. We often turn it on on the server side, like this A 100K file may only be less than 20KB after gzip compression. Let me do it next...