How can you prevent dropdown selections from resetting in PHP when using multiple forms on a single page?

When using multiple forms on a single page in PHP, the issue of dropdown selections resetting can be prevented by using session variables to store the selected values. By storing the selected values in session variables, the values will persist across form submissions and prevent the dropdown selections from resetting. 

<?php
session_start();

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Store selected dropdown value in session variable
    $_SESSION['dropdown_value'] = $_POST['dropdown'];
}

// Set default value for dropdown
$selected_value = isset($_SESSION['dropdown_value']) ? $_SESSION['dropdown_value'] : '';

?>

<form method="post">
    <select name="dropdown">
        <option value="option1" <?php if ($selected_value == 'option1') echo 'selected'; ?>>Option 1</option>
        <option value="option2" <?php if ($selected_value == 'option2') echo 'selected'; ?>>Option 2</option>
        <option value="option3" <?php if ($selected_value == 'option3') echo 'selected'; ?>>Option 3</option>
    </select>
    <input type="submit" value="Submit">
</form>

Keywords

PHP dropdown selections multiple forms prevent resetting single page

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