How can the PHP code be modified to properly handle the checkbox values from the form?

The issue with handling checkbox values in PHP is that when a checkbox is not checked, it does not get submitted with the form data. To properly handle checkbox values, you can check if the checkbox is set in the $_POST array and assign a default value if it is not set. This way, you can ensure that you always have a value to work with. 

// Check if the checkbox is set in the $_POST array, if not, assign a default value
$checkbox_value = isset($_POST['checkbox_name']) ? $_POST['checkbox_name'] : '0';

// Now you can use $checkbox_value in your code

Keywords

PHP checkbox form handling POST method isset function

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