What are the potential pitfalls of using comparison operators in PHP with uninitialized variables?

Using comparison operators with uninitialized variables in PHP can lead to unexpected results, as uninitialized variables are considered equal to NULL. This can result in unintended behavior or errors in your code. To avoid this issue, always make sure to initialize variables before using comparison operators on them.

// Initialize the variable before using comparison operators
$variable = 10;

if ($variable == 10) {
    echo "Variable is equal to 10";
} else {
    echo "Variable is not equal to 10";
}