In what scenarios is it advisable to use short if/else constructs in PHP, and when is it better to opt for longer, more explicit conditional statements?

Short if/else constructs are advisable when you have simple conditions that can be expressed concisely. They are useful for quick checks and can make the code more readable when used appropriately. Longer, more explicit conditional statements should be used when the logic is more complex or when you need to handle multiple conditions in a more detailed manner.

// Short if/else construct example
$age = 25;
$message = ($age >= 18) ? "You are an adult" : "You are a minor";
echo $message;

// Longer, more explicit conditional statement example
$score = 85;
if ($score >= 90) {
    echo "A";
} elseif ($score >= 80) {
    echo "B";
} elseif ($score >= 70) {
    echo "C";
} else {
    echo "F";
}