Is it best practice to output a variable that is known to be empty in PHP?

It is not considered best practice to output a variable that is known to be empty in PHP, as it can lead to unexpected behavior or errors in your application. To prevent this, you can check if the variable is empty before outputting it using conditional statements like if or ternary operators.

// Check if the variable is empty before outputting it
if (!empty($variable)) {
    echo $variable;
}