What is the best practice for passing form data between multiple PHP files?

When passing form data between multiple PHP files, a common and effective practice is to use sessions. You can store the form data in session variables in the first PHP file and access them in subsequent PHP files. This allows you to maintain the form data across different pages without the need to constantly pass it through URL parameters or hidden form fields. 

// First PHP file where form data is collected and stored in session
session_start();

// Collect form data
$formData = $_POST['formData'];

// Store form data in session variable
$_SESSION['formData'] = $formData;

// Redirect to next PHP file
header("Location: next.php");
exit;
```

```php
// Subsequent PHP file where form data is accessed from session
session_start();

// Access form data from session
$formData = $_SESSION['formData'];

// Use form data as needed
echo "Form data: " . $formData;

Keywords

POST method $_POST superglobal form processing include statement data validation

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