PHP: $_POST

How $_POST data work.

• $_POST is an associative array of variables.
• $_POST usually passes data from a web form to a result page that process the form data.
• $_POST can also be sent in the background as AJAX data (so the user is never redirected to the result page).
• $_POST is sent via the HTTP POST method.
• $_POST is a superglobal and is therefore available in all scopes throughout a script (can be accessed from all functions, objects etc.).
• $_POST data received from a public websites should not be trusted by the system (it is necessary to make the data "safe" and remove potential security threats before inserting into the database).
• $_POST data is normally hidden to the user.
• $_POST data can be viewed in Developer tools such as the FireBug add-on for FireFox.
• $_POST is considered more secure than $_GET.
• Result pages using $_POST data cannot be bookmarked by the user (use $_GET instead).
• $_POST data is also available in the $_REQUEST varible.