How can the issue of browser caching and retaining selected values be addressed when using checkboxes in PHP forms?

Issue: Browser caching can cause selected checkbox values in PHP forms to be retained even after the user has deselected them. To address this issue, we can add a random value to the form action URL to prevent caching. 

<form action="form.php?<?php echo uniqid(); ?>" method="post">
    <input type="checkbox" name="option1" value="1" <?php if(isset($_POST['option1'])) echo "checked"; ?>> Option 1
    <input type="checkbox" name="option2" value="1" <?php if(isset($_POST['option2'])) echo "checked"; ?>> Option 2
    <input type="submit" value="Submit">
</form>

Keywords

browser caching selected values checkboxes PHP forms retention

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