What are some alternative methods to using GET parameters to select and call specific functions in PHP code?

Using GET parameters to select and call specific functions in PHP code can pose security risks, such as allowing users to potentially access unintended functions or manipulate the application's behavior. To address this, one alternative method is to use a switch statement with a predefined list of allowed functions to call based on a parameter value. This approach helps ensure that only the specified functions can be accessed via the parameter value, reducing the risk of security vulnerabilities. 

<?php

// Define a list of allowed functions
$allowedFunctions = array(
    'function1',
    'function2',
    'function3'
);

// Check if the function parameter is set and is in the list of allowed functions
if(isset($_GET['function']) && in_array($_GET['function'], $allowedFunctions)){
    // Call the selected function
    $selectedFunction = $_GET['function'];
    $selectedFunction();
}

// Define the functions to be called
function function1(){
    echo "Function 1 called";
}

function function2(){
    echo "Function 2 called";
}

function function3(){
    echo "Function 3 called";
}

?>

Keywords

POST method routing switch statement URL rewriting query string

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