file_get_contents远程获取XML乱码问题
获取的头部当中有Content-Encoding: gzip说明内容是GZIP压缩的 解压后就能得到内容了
PHP内置的file_get_contents不支持GZIP 可以试试CURL 好象能处理GZIP
function gzdecode($data) {
$len = strlen($data);
if ($len < 18 || strcmp(substr($data, 0, 2), "\x1f\x8b")) {
return null; // Not GZIP format (See RFC 1952)
}
$method = ord(substr($data, 2, 1)); // Compression method
$flags = ord(substr($data, 3, 1)); // Flags
if ($flags & 31 != $flags) {
// Reserved bits are set -- NOT ALLOWED by RFC 1952
return null;
}
// NOTE: $mtime may be negative (PHP integer limitations)
$mtime = unpack("V", substr($data, 4, 4));
$mtime = $mtime[1];
$xfl = substr($data, 8, 1);
$os = substr($data, 8, 1);
$headerlen = 10;
$extralen = 0;
$extra = "";
if ($flags & 4) {
// 2-byte length prefixed EXTRA data in header
if ($len - $headerlen - 2 < 8) {
return false; // Invalid format
}
$extralen = unpack("v", substr($data, 8, 2));
$extralen = $extralen[1];
if ($len - $headerlen - 2 - $extralen < 8) {
return false; // Invalid format
}
$extra = substr($data, 10, $extralen);
$headerlen += 2 + $extralen;
}
$filenamelen = 0;
$filename = "";
if ($flags & 8) {
// C-style string file NAME data in header
if ($len - $headerlen - 1 < 8) {
return false; // Invalid format
}
$filenamelen = strpos(substr($data, 8 + $extralen), chr(0));
if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) {
return false; // Invalid format
}
$filename = substr($data, $headerlen, $filenamelen);
$headerlen += $filenamelen + 1;
}
$commentlen = 0;
$comment = "";
if ($flags & 16) {
// C-style string COMMENT data in header
if ($len - $headerlen - 1 < 8) {
return false; // Invalid format
}
$commentlen = strpos(substr($data, 8 + $extralen + $filenamelen), chr(0));
if ($commentlen === false || $len - $headerlen - $commentlen - 1 < 8) {
return false; // Invalid header format
}
$comment = substr($data, $headerlen, $commentlen);
$headerlen += $commentlen + 1;
}
$headercrc = "";
if ($flags & 1) {
// 2-bytes (lowest order) of CRC32 on header present
if ($len - $headerlen - 2 < 8) {
return false; // Invalid format
}
$calccrc = crc32(substr($data, 0, $headerlen)) & 0xffff;
$headercrc = unpack("v", substr($data, $headerlen, 2));
$headercrc = $headercrc[1];
if ($headercrc != $calccrc) {
return false; // Bad header CRC
}
$headerlen += 2;
}
// GZIP FOOTER - These be negative due to PHP's limitations
$datacrc = unpack("V", substr($data, -8, 4));
$datacrc = $datacrc[1];
$isize = unpack("V", substr($data, -4));
$isize = $isize[1];
// Perform the decompression:
$bodylen = $len - $headerlen - 8;
if ($bodylen < 1) {
// This should never happen - IMPLEMENTATION BUG!
return null;
}
$body = substr($data, $headerlen, $bodylen);
$data = "";
if ($bodylen > 0) {
switch ($method) {
case 8:
// Currently the only supported compression method:
$data = gzinflate($body);
break;
default:
// Unknown compression method
return false;
}
} else {
// I'm not sure if zero-byte body content is allowed.
// Allow it for now... Do nothing...
}
// Verifiy decompressed size and CRC32:
// NOTE: This may fail with large data sizes depending on how
// PHP's integer limitations affect strlen() since $isize
// may be negative for large sizes.
if ($isize != strlen($data) || crc32($data) != $datacrc) {
// Bad format! Length or CRC doesn't match!
return false;
}
return $data;
}
2.调用此函数将获得的数据解码
$html=file_get_contents('http://xuxiaonian.blog.sohu.com/160201697.html');
$html=gzdecode($html);
再给出一个CURL的解决方案：
// 初始化一个 cURL 对象
$curl = curl_init();
//// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://url');
//设置请求的数据是gzip类型
curl_setopt($curl, CURLOPT_ENCODING, "gzip");
// 设置header
curl_setopt($curl, CURLOPT_HEADER, 0);
// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_HTTPGET, 0);
// 运行cURL，请求网页
$data = curl_exec($curl);
// 关闭URL请求
curl_close($curl);
// 显示获得的数据
var_dump($data);
建议还是使用CURL来解决，毕竟这是内置的扩展