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PHP解压网页GZIP 函数

admin 2010.09.09 Php 发表评论 (0)
现在很多网页都是GZIP压缩的,如果用PHP取过来发现是一堆乱码,可以用GZIP函数类解压,但有时候PHP编译没编译GZIP
可用下面函数代替:
<?php
if (!function_exists ( ‘gzdecode’ )) {
$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;
}

现在很多网页都是GZIP压缩的,如果用PHP取过来发现是一堆乱码,可以用GZIP函数类解压,但有时候PHP编译没编译GZIP可用下面函数代替:<?phpif (!function_exists ( ‘gzdecode’ )) { $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;}

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