How should if-else statements be structured to check if two variables are not equal in PHP?

To check if two variables are not equal in PHP, you can use an if-else statement with the != (not equal) operator. If the two variables are not equal, the condition will evaluate to true and the code within the if block will be executed. Otherwise, the code within the else block will be executed.

$variable1 = 10;
$variable2 = 20;

if ($variable1 != $variable2) {
    echo "The two variables are not equal.";
} else {
    echo "The two variables are equal.";
}