Returns a URL-encoded version of a string.
string u( string input )
This is useful when passing a query string parameter as part of a link.
If there is any possibility that a parameter value might contain special characters such as spaces, you should use the
u( ) function on that parameter.
URL-Encode a Value
Use Case: If you need to pass any information, such as a user name, in a URL as a query string parameter. To prevent the link breaking, always use u() which allows you to URL-encode special characters. For example, the user name value “Sailthru User” would become “Sailthru%20User”
Explanation: This script uses the u() function to add URL-encoding to a query parameter. In this instance, the space between “Sailthru” and “User” is being converted to the ASCII “%20″.