How do I install Zlib for PHP under Windows?
migrated from stackoverflow.com May 20 '11 at 13:56
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Since it is included in PHP versions since 4.3.0, I would put a phpinfo.php page online with the following contents:
Save this file, upload it to a web-accessible directory and browse to it. I would then do a find (Ctrl+F in Firefox) and search for zlib. That'll show you information regarding zlib if it is detected - It should be.
Once you have your information, I would delete the phpinfo.php file from the server or at least move it out of the web-accessible directory to prevent snooping.