What are some potential pitfalls of using $_GET to pass variables in PHP scripts?

Using $_GET to pass variables in PHP scripts can expose your application to security vulnerabilities such as SQL injection attacks. To mitigate this risk, you should always sanitize and validate any data received via $_GET before using it in your application. 

// Sanitize and validate data received via $_GET before using it
$variable = isset($_GET['variable']) ? filter_var($_GET['variable'], FILTER_SANITIZE_STRING) : '';

// Now you can safely use $variable in your application

Keywords

$_GET security vulnerabilities SQL injection cross-site scripting data validation

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