How to Retrieve All Variables Transmitted via POST

When handling POST data, PHP automatically populates the $_POST array. An array's components represent the data associated with form input elements.

To view the contents of the $_POST array, simply use var_dump($_POST);, or you can access individual values by specifying their corresponding array key (e.g., $name = $_POST["name"];).

Assuming your form is using the usual encoding method (enctype="multipart/form-data"), you can check whether a checkbox is selected using the following syntax:

if (isset($_POST['myCheckbox']) && $_POST['myCheckbox'] == 'Yes') {
    ...
}

If you have an array of checkboxes, where each checkbox has a unique "value" attribute, the selected values will be available as an array. To access this array, use the syntax: $arrayName = $_POST["arrayName[]"];. Here's an example:

val1
val2
val3

By using [] in the checkbox name, the selected values will be available in an array called $_POST['myCheckbox'].