How can PHP developers troubleshoot errors related to boolean values returned from DB queries in functions?

When troubleshooting errors related to boolean values returned from DB queries in functions, PHP developers can check the data type of the returned value using var_dump or gettype functions. They can also ensure that the query is correctly fetching the expected boolean value from the database. Additionally, developers can use strict comparison operators (===) to check for boolean values in their code.

// Example code snippet to troubleshoot boolean values returned from DB queries in functions

// Assume $result is the boolean value returned from the DB query
var_dump($result); // Check the data type of the returned value

if ($result === true) {
    // Handle the true boolean value
    echo "Boolean value is true";
} elseif ($result === false) {
    // Handle the false boolean value
    echo "Boolean value is false";
} else {
    // Handle other cases
    echo "Unexpected boolean value";
}