Zlib: problem with gzuncompress

[Anon]

Hello,

I've a problem with decompressing a gzip encoded string.

I tried to uncompress a gzip encoded string, which i had received from a webserver. I used the function gzuncompress ($content), but the uncompression failed with the error 'gzuncompress: data error'.

But when i write the content binary to a file and use the function readgzfile ('filename') it decompresses correctly.

So the compressed data is correct, but somehow the gzuncompress function fails. If anybody knows why, please let me know, thanks

Jeroen

[van__]

gzuncompress works on strings, and is not real gzip compression. Thus it fails to operate on gzipped files sent from the webserver. Actual file compression with gzip is GZIP compression/decompression and that's why it works.

The reason here is that the gzcompress does not provide gzip headers as it is intended for use on strings, not files. And without the header, it is not a valid gzip file, which is why you would use gzuncompress on that type of compression.