l() function is a beautiful thing available in Drupal. It is a simple and secure way to create an HTML anchor tag. Usually we think of l() function to format an internal anchor tag which supports things like clean URLs. You can still create an external URL link with the l() function as an anchor tag.
After smartphones born, people don't just use desktop computer or laptop anymore to visit the websites. They will go for smartphones, tablets, palmtops and so on. How can we keep design to all these different devices? There is a way, that`s responsive webdesign.As the name tells, its a matter of responding to the site user's device specifics.