note 8553 deleted from function.gzcompress by nlopess

Note Submitter: @boas.anthro.mnsu.edu ---- As a precaution, the gzcompress() and gzuncompress() functions do not actually use gzip style compression -- rather, they use compress or deflate. This will greatly affect compression of output from PHP scripts. Assuming that you want to optionally compress data from your PHP script to the browser (if they support it), then you must not use this function. if (browser_supports_gzip) { ob_start(); } ... you output stuff here ... if (browser_supports_gzip) { Header("Content-Encoding: gzip"); // THIS DOES NOT WORK echo gzcompress(ob_get_contents()); ob_end_clean(); } If gzcompress gets changed in the future (4.0.3?) then outputting compressed output from PHP scripts will be much easier. Until then, you must replace the single line above with several others -- tempnam() to find a temporary file, gzopen() it, write the contents of the buffer to the compressed file, close the file, open the file as binary, write the output to the browser, close the file, delete the temporary file. I sincerely hope that either the documentation is changed to reflect that gzip style compression is not used, or maybe gzcompress()'s code gets changed in PHP.