How can the use of print_r/var_dump help in understanding the structure of POST data in PHP?

Using print_r or var_dump in PHP can help in understanding the structure of POST data by displaying the contents of the $_POST superglobal array. This can be particularly useful when trying to debug and analyze the data being sent via a form submission. By using these functions, you can easily see the key-value pairs within the POST data and identify any issues with the data being received.

// Display the structure of POST data using print_r
print_r($_POST);

// Display the structure of POST data using var_dump
var_dump($_POST);