Input Validation Security Check

Analyze PHP code for input validation vulnerabilities.

Detection Patterns

1. Missing Input Validation

// CRITICAL: Direct use of request data
$id = $_GET['id'];
$this->delete($id); // No validation

// CRITICAL: Controller without validation
public function update(Request $request): Response
{
    $data = $request->all();
    $this->service->update($data); // Unvalidated
}