In this article, you will learn how to check empty variables in PHP using empty keywords. The empty keyword in PHP acts as a function that returns true if a variable does not exist, or if its value is considered empty. The empty keyword also evaluates expressions that are not in a variable.
examples of the EMPTY keyword
Example 1. In this example, we check if a variable is empty.
<?php
$str = "";
if(empty($str)) {
echo "The string is empty";
}
?>
