How can PHP be utilized to process and display checkbox selections from a form submission?

To process and display checkbox selections from a form submission using PHP, you can access the checkbox values through the $_POST superglobal array. You can then loop through these values and display them as needed in your HTML output.

<?php
// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Retrieve selected checkbox values
    if (isset($_POST['checkbox'])) {
        $checkbox_values = $_POST['checkbox'];
        
        // Display selected checkbox values
        foreach ($checkbox_values as $value) {
            echo $value . "<br>";
        }
    }
}
?>

<!-- HTML form with checkboxes -->
<form method="post">
    <input type="checkbox" name="checkbox[]" value="Option 1"> Option 1 <br>
    <input type="checkbox" name="checkbox[]" value="Option 2"> Option 2 <br>
    <input type="checkbox" name="checkbox[]" value="Option 3"> Option 3 <br>
    
    <input type="submit" value="Submit">
</form>