+pecl/http depends on a number of system libraries and PHP extensions for special features.
+
+#### Required system libraries:
+
+The following system libraries are required to build this extension:
+
+=zlib=
+ Provides gzip/zlib/deflate encoding.
+ Install on Debian: `apt-get install zlib1g-dev`
+
+
+#### Optional system libraries:
+
+The following system libraries are optional and provide additional features:
+
+=libidn=
+ Provides IDNA support in URLs.
+ Install on Debian: `apt-get install libidn11-dev`
+
+=libcurl=
+ Provides HTTP request functionality.
+ 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.
+ Install on Debian: `apt-get install libevent-dev`
+
+### PHP extensions:
+