php检测url页面是否使用gzip压缩小结

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

# BEGIN GZIP
#apache开启gzip压缩，前提要装gzip模块哦
<ifmodule mod_deflate.c>
AddOutputFilterByType DEFLATE text/text text/html
text/plain text/xml text/css application/x-javascript
application/javascript
</ifmodule>
# END GZIP

#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;

//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.111cn.net';
$file = fopen($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;

<?php
/*
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";
}
 
?>