What potential issue is the user facing with their if statement in the PHP code?

The potential issue the user is facing with their if statement in the PHP code is that they are using a single equal sign (=) for comparison instead of a double equal sign (==) or triple equal sign (===). In PHP, a single equal sign is used for assignment, not for comparison. To fix this issue, the user should use a double equal sign for loose comparison or a triple equal sign for strict comparison.

// Incorrect if statement
if ($variable = 10) {
    echo "Variable is equal to 10";
}

// Correct if statement for loose comparison
if ($variable == 10) {
    echo "Variable is equal to 10";
}

// Correct if statement for strict comparison
if ($variable === 10) {
    echo "Variable is equal to 10";
}