PHP5, HTML & CSS Web Project | Null Value & Boolean Values in IF Conditional | Part-11

In this part, we shall continue on with the discussion of if conditioning. We will contextual look at the real-life application of the using if conditioning and retrieving a value from an user's input. This video will briefly dwell with the subject of using a global variable called post that can be used to retrieve the value that an user types in an HTML input field. Besides, we shall look into a keyword known as null. Null means no-value in programming's perspective. Using this null's concept, we can assume that when an user doesn't type in a value, that field will contain a value of null and if that field contains the null keyword, then we can apply a check using the is_null function that will return true if the input field has no value.