What are common pitfalls when upgrading from PHP 7.4 to PHP 8.0?

One common pitfall when upgrading from PHP 7.4 to PHP 8.0 is the removal of the "real" type declaration. If your codebase relies on the "real" type, you will need to update it to use "float" instead. This change ensures compatibility with PHP 8.0.

// Before PHP 8.0
function calculateValue(real $num): float {
    return $num * 2.5;
}

// After PHP 8.0
function calculateValue(float $num): float {
    return $num * 2.5;
}