To install the pecl_http PHP extension on Ubuntu 10.04 follow the instructions below:

1. Install the required packages:

   # sudo apt-get install php-pear php5-dev libcurl4-openssl-dev

   # sudo apt-get install php-pear php5-dev libcurl4-openssl-dev

2. Install pecl_http:

   # sudo pecl install pecl_http

   # sudo pecl install pecl_http

3. Create file /etc/php5/conf.d/http.ini with the following content:

   extension=http.so

   extension=http.so

4. Restart Apache2:

   # sudo /etc/init.d/apache2 restart

   # sudo /etc/init.d/apache2 restart

After restarting the Apache2 web server a “http” section should be included in the phpinfo() output.