What potential pitfalls should be considered when passing parameters between PHP files?

When passing parameters between PHP files, it's important to consider security risks such as injection attacks. To prevent this, always sanitize and validate any user input before passing it to another file. Additionally, ensure that sensitive information is not exposed in the URL parameters by using POST requests instead of GET requests. 

// Sanitize and validate user input before passing it to another file
$input = filter_input(INPUT_POST, 'input_name', FILTER_SANITIZE_STRING);

// Use POST requests to pass parameters instead of GET requests
<form action="process.php" method="post">
  <input type="text" name="input_name">
  <button type="submit">Submit</button>
</form>

Keywords

scope global variables include require data validation

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