php对gzip文件或者字符串解压实例参考_php技巧

WBOY
Release: 2016-05-17 09:35:54
Original
890 people have browsed it

      其实php对gzip解压很简单,用内置的gzdecode函数就可以了,不过很可惜我配置了半天也无法支持gzdecode函数,所以只好变通一下: 

复制代码 代码如下:

if (!function_exists('gzdecode')) {     
    function gzdecode ($data) {     
        $flags = ord(substr($data, 3, 1));     
        $headerlen = 10;     
        $extralen = 0;     
        $filenamelen = 0;     
        if ($flags & 4) {     
            $extralen = unpack('v' ,substr($data, 10, 2));     
            $extralen = $extralen[1];     
            $headerlen += 2 + $extralen;     
        }     
        if ($flags & 8) // Filename     
            $headerlen = strpos($data, chr(0), $headerlen) + 1;     
        if ($flags & 16) // Comment     
            $headerlen = strpos($data, chr(0), $headerlen) + 1;     
        if ($flags & 2) // CRC at end of file     
            $headerlen += 2;     
        $unpacked = @gzinflate(substr($data, $headerlen));     
        if ($unpacked === FALSE)     
              $unpacked = $data;     
        return $unpacked;     
     }     
}

调用方法很简单: 
复制代码 代码如下:

$f=@file_get_contents("http://www.jb51.net");      
echo gzdecode($f);     
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