How can data from a text field be preserved and displayed on a new page in PHP?

To preserve and display data from a text field on a new page in PHP, you can use the $_POST superglobal to retrieve the data submitted from the form on the previous page. You can then store this data in a session variable and access it on the new page to display the preserved text field data. 

<?php
session_start();

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $_SESSION['text_field_data'] = $_POST['text_field'];
    header("Location: new_page.php");
    exit();
}
?>
```

On the new_page.php:

```php
<?php
session_start();

if (isset($_SESSION['text_field_data'])) {
    $text_field_data = $_SESSION['text_field_data'];
    echo "Preserved text field data: " . $text_field_data;
} else {
    echo "No text field data preserved.";
}
?>

Keywords

PHP form submission $_POST session variables data persistence

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