How can the issue of the NULL value in the error message be addressed when dealing with database queries and variable assignments in PHP?

When dealing with database queries and variable assignments in PHP, the issue of the NULL value in error messages can be addressed by checking if the variable is NULL before using it in the query. This can be done using conditional statements or by initializing the variable with a default value if it is NULL.

// Check if the variable is NULL before using it in the query
if($variable !== NULL) {
    // Perform database query using the variable
    $query = "SELECT * FROM table WHERE column = '$variable'";
} else {
    // Handle the case where the variable is NULL
    echo "Variable is NULL";
}