What potential issues can arise if external inputs, such as $_GET['ID'], are not properly validated in PHP code?

If external inputs, such as $_GET['ID'], are not properly validated in PHP code, it can lead to security vulnerabilities such as SQL injection, cross-site scripting (XSS), and other forms of attacks. To solve this issue, it is important to validate and sanitize all external inputs before using them in your code. 

$id = isset($_GET['ID']) ? $_GET['ID'] : ''; // Validate and sanitize the input
$id = filter_var($id, FILTER_SANITIZE_NUMBER_INT); // Sanitize the input as an integer

// Now you can safely use the $id variable in your code

Keywords

SQL injection cross-site scripting security vulnerabilities data manipulation code injection

Related Questions