php对gzip文件或者字符串解压实例参考
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：
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：
$f=@file_get_contents("//www.jb51.net");
echo gzdecode($f);
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:
$f=@file_get_contents("//www.jb51.net");
echo gzdecode($f);