When using $_POST vars is it required that a form is used ?
In other words I can create an href link and echo
variable and pick them up using $_GET in the following
page.
No so with $_POST ?
in order to create POST vars the proper request headers need to sent to the browser. that could be done with some newfangled javascript techniques e.g. XHTTPRequest object - see sitepoint.com (Harry Fuecks article)
if you don't care if a var comes via post or get you could use a func like this to avoid having to check both superglobals everytime
/**
* getGP()
*
* this function will return the value of a GET or POST var that corresponds to the
* variable name pasted, if nothing is found NULL is returned. contents of POST array
* takes precendence over the contents of the GET array. You can specify a value as second argument
* which will be returned if the GP var *does not* exist; a third parameter can be given to
* which will act as the return value if the GP *does* exist - the limitation is that the parameter cannot be
* used to return a literal NULL; but I suggest that this would probably be a silly thing to do in practice
*
* @var string $v // the name of GP variable whose value to return
* @var mixed $r // value to return if the GP variable was not set
* @var mixed $t // value to return if the GP variable was set (i.e. override the value from GP)
*
* @return mixed
*/
function getGP($v = '', $r = null, $t = null)
{
if (!empty($v)) {
if (isset($_GET[$v])) { $r = (!is_null($t)) ? $t: $_GET[$v]; }
if (isset($_POST[$v])) { $r = (!is_null($t)) ? $t: $_POST[$v];}
}
return $r; }
Stuart
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