How does the structure of HTML forms impact the preservation of session data in PHP scripts, particularly when multiple forms are involved?
The structure of HTML forms can impact the preservation of session data in PHP scripts when multiple forms are involved by potentially overwriting session variables if not handled correctly. To solve this issue, you can use unique form names or hidden input fields to differentiate between the forms and preserve session data accordingly.
<?php
session_start();
// Check if form data is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    if ($_POST['form_type'] == 'form1') {
        // Process data from form 1
        $_SESSION['data_form1'] = $_POST['data_form1'];
    } elseif ($_POST['form_type'] == 'form2') {
        // Process data from form 2
        $_SESSION['data_form2'] = $_POST['data_form2'];
    }
}
?>
```
In the HTML forms, you would need to include a hidden input field to specify the form type:
```html
<form action="process.php" method="post">
    <input type="hidden" name="form_type" value="form1">
    <!-- Other form fields for form 1 -->
</form>
<form action="process.php" method="post">
    <input type="hidden" name="form_type" value="form2">
    <!-- Other form fields for form 2 -->
</form>
            
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