What potential security risks are involved in directly executing functions based on URL parameters in PHP?

Directly executing functions based on URL parameters in PHP can lead to security risks such as code injection and remote code execution. To mitigate these risks, it is important to validate and sanitize any input coming from the URL parameters before executing any functions. 

// Example of validating and sanitizing input from URL parameters before executing a function
$function = $_GET['function'] ?? '';

// List of allowed functions
$allowedFunctions = ['function1', 'function2', 'function3'];

if (in_array($function, $allowedFunctions)) {
    // Call the function if it is allowed
    $function();
} else {
    // Handle invalid function
    echo 'Invalid function';
}

// Define the functions
function function1() {
    // Function logic
}

function function2() {
    // Function logic
}

function function3() {
    // Function logic
}

Keywords

SQL injection cross-site scripting remote code execution input validation PHP superglobals

Related Questions