PHP Tutorials Examples: Difference Between isset empty is-null

PHP Tutorials Examples: Difference Between isset empty is-null

Quite often in code reviews I have come across code that checks for empty or null values, or if a variable is set. Many of these checks fail as the wrong function is being used to assert the correct value. While it is important to be checking values, it is equally important to understand the difference between the different methods of checking and testing values for empty, null, or if they are set.

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