What potential issue could arise when comparing variables of different types in PHP?

When comparing variables of different types in PHP, a potential issue that could arise is type coercion, where PHP automatically converts one variable type to match the other for the comparison. This can lead to unexpected results or errors in the comparison. To solve this issue, you can explicitly convert the variables to the same type before comparing them using type-safe comparison operators like === and !==.

$var1 = "10";
$var2 = 10;

// Explicitly convert $var1 to an integer before comparison
if ((int)$var1 === $var2) {
    echo "Variables are equal";
} else {
    echo "Variables are not equal";
}