How can developers ensure that their functions in PHP are compatible with the mysqli object and avoid errors related to global variables?

Developers can ensure compatibility with the mysqli object and avoid global variable errors by passing the mysqli object as a parameter to their functions instead of relying on global variables. This approach helps to encapsulate the database connection within the function and makes the code more modular and easier to test. 

// Example of a function that uses mysqli object as a parameter
function getUsers(mysqli $conn) {
    $query = "SELECT * FROM users";
    $result = $conn->query($query);
    
    // Process the result
    // ...
}

// Create a mysqli object and pass it to the function
$conn = new mysqli($host, $username, $password, $database);
getUsers($conn);

Keywords

PHP mysqli object global variables function compatibility errors

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