What are the potential limitations of passing data through a URL in PHP?

Passing data through a URL in PHP can lead to potential security vulnerabilities, such as exposing sensitive information and increasing the risk of data tampering. To address this issue, it is recommended to use POST method instead of GET method for passing sensitive data through forms to prevent data from being visible in the URL. 

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

In the above code snippet, the form is using the POST method to send data to the "process.php" file, which helps in preventing sensitive information like username and password from being exposed in the URL.

Keywords

security risks URL encoding data leakage session hijacking injection attacks

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