How can I retain the selected option in a dropdown list even after refreshing the page in PHP?

When a page is refreshed, the selected option in a dropdown list is reset to its default value. To retain the selected option even after refreshing the page in PHP, you can store the selected value in a session variable and set the selected attribute in the dropdown list based on this stored value. 

<?php
session_start();

$selectedOption = isset($_POST['dropdown']) ? $_POST['dropdown'] : (isset($_SESSION['selectedOption']) ? $_SESSION['selectedOption'] : '');

if(isset($_POST['submit'])){
    $_SESSION['selectedOption'] = $_POST['dropdown'];
}

?>

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

Keywords

PHP dropdown list selected option session page refresh

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