The associative arrays used to pass submitted form data to
$_GET for the
GET method and
$_POST for the
The register_globals setting was the default in versions of PHP prior to 4.2.0. It was not a good idea, because it automatically assigned submitted form field data to PHP variables, thus opening up a security hole for potential hackers, who could attempt to break into PHP code by initializing variables to values of their choice.
The difference between a text box and a text area is that although they both accept text for form input, a text box is a single line, whereas a text area can be multiple lines and include word wrapping.
To offer three mutually exclusive choices in a web form, you should use radio buttons, because checkboxes allow multiple selections.
Submit a group of selections from a web form using a single
field name by using an array name with square brackets such as
choices, instead of a regular
field name. Each value is then placed into the array, whose length
will be the number of elements submitted.
To submit a form field without the user seeing it, place it
in a hidden field using the parameter
You can encapsulate a form element and supporting text or
graphics, making the entire unit selectable with a mouse-click, by
To convert HTML into a format that can be displayed but will ...