=zlib=
Provides gzip/zlib/deflate encoding.
+ Minimum version: 1.2.0.4
Install on Debian: `apt-get install zlib1g-dev`
=libidn=
Provides IDNA support in URLs.
+ Minimum version: none
Install on Debian: `apt-get install libidn11-dev`
=libcurl=
Provides HTTP request functionality.
+ Minimum version: 7.18.2
Install on Debian: `apt-get install libcurl4-openssl-dev`
Note: There are usually different styles of SSL support for libcurl available, so you can replace 'openssl' in the above command f.e. with 'nss' or 'gnutls'.
=libevent=
Eventloop support for the HTTP client.
+ Minimum version: none
Install on Debian: `apt-get install libevent-dev`
### PHP extensions: