Documentation improvements

In the section explaining $this->input->post(), it would be helpful if the documentation noted that array elements cannot be retrieved individually.

This comes up when you use an array in your forms. If you use $book['isbn'], $book['author'], $book['title'], $book['price'] in your form, for example, upon posting the form, the $_POST array will contain an array called book with keys isbn, author, title, and price. You can retrieve those one by one directly by accessing the $_POST variable, like this:

PHP Code:

$price = $_POST['book']['price']; 


But using the Post method of the Input class, you must get the whole array and then access the individual elements, like this:

PHP Code:

$book = $this->input->post('book');
$price = $book['price'];