<?php

/**

* PHP code to inject form parameters for an experiment with sanity checks.

*

* This script simulates injecting form data and performing basic checks.

* It's designed to be a starting point for testing and experimentation.

*/

// Simulated form data (replace with actual form data if needed)

$formData = [

'name' => 'John Doe',

'email' => 'john.doe@example.com',

'age' => '30',

'city' => 'New York',

'country' => 'USA',

'message' => 'This is a test message.'

];

// Sanity checks

function validateName($name) {

return (strlen($name) > 2 && strlen($name) < 50) && !preg_match('/[^a-zA-Z\s]/', $name); // Name must be 3-50 chars, only letters and spaces

}

function validateEmail($email) {

return filter_var($email, FILTER_VALIDATE_EMAIL) !== false; // Basic email validation

}

function validateAge($age) {

$age = (int)$age; // Convert to integer

return $age >= 18 && $age <= 120; // Age between 18 and 120

}

// Inject and validate form parameters

echo "<h2>Form Parameter Injection and Validation</h2>";

echo "<pre>"; // For formatted output

echo "Name: " . ($formData['name'] ?? 'N/A') . " - Valid: " . (validateName($formData['name']) ? 'Yes' : 'No') . "\n";

echo "Email: " . ($formData['email'] ?? 'N/A') . " - Valid: " . (validateEmail($formData['email']) ? 'Yes' : 'No') . "\n";

echo "Age: " . ($formData['age'] ?? 'N/A') . " - Valid: " . (validateAge($formData['age']) ? 'Yes' : 'No') . "\n";

echo "City: " . ($formData['city'] ?? 'N/A') . "\n";

echo "Country: " . ($formData['country'] ?? 'N/A') . "\n";

echo "Message: " . ($formData['message'] ?? 'N/A') . "\n";

echo "</pre>";

?>