Is it advisable to declare PHP functions as PUBLIC to prevent unauthorized access from external servers?

Declaring PHP functions as PUBLIC does not prevent unauthorized access from external servers. Instead, you should focus on implementing proper authentication and authorization mechanisms to control access to your functions. This can include using tokens, sessions, or other secure methods to verify the identity of the user before allowing them to execute the function. 

// Example of implementing authentication before executing a function

session_start();

if (!isset($_SESSION['authenticated']) || $_SESSION['authenticated'] !== true) {
    die('Unauthorized access');
}

// Your function code here
function myFunction() {
    // Function logic
}

Keywords

PHP functions public unauthorized access security

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