I am very new to magento and currently I am getting "PHP Extension curl must be loaded" error during magento installation.
Can you help me?
If your server does not have curl installed on it you can type one of the following commands to install it:
For Debian/Ubuntu based systems you can type below command
sudo apt-get install php5-curl sudo /etc/init.d/apache2 restart
For RedHat/CentOS based systems you can type (as root)
yum install php5-curl /etc/init.d/httpd restart
This should install curl and have it start to work for you.