What is the potential issue with variable passing through URLs in PHP, especially with newer versions like XAMP?

Passing variables through URLs in PHP can pose a security risk as it makes the data visible and easily tampered with by users. This can lead to potential security vulnerabilities such as injection attacks or unauthorized access to sensitive information. To mitigate this risk, it is recommended to use POST requests instead of GET requests when passing sensitive data through URLs. 

<form method="post" action="process.php">
    <input type="text" name="username">
    <input type="password" name="password">
    <button type="submit">Submit</button>
</form>
```

In the "process.php" file, you can access the submitted data using the $_POST superglobal array:

```php
$username = $_POST['username'];
$password = $_POST['password'];

Keywords

security vulnerability XSS attacks URL encoding PHP superglobals data leakage

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