Manipulating Query String

[Lex@SG]

Hi there,

May I know how do I detect whether there is any query string in my url?

For example, my url is http://www.xxxx.com/napp/view.php?vid=1

How do I display an error page when a user types in the wrong url such as:
http://www.xxxx.com/napp/view.php (Without the ?vid=1)

[visualAd]

You can acces the whole query string using the following:

$qs = $_SERVER['QUERY_STRING']; 

PHP also loads the variables in the query string into the $_GET super global array. You can check whether it was supplied by using the isset() function:

if (! isset($_GET['vid'])) {
  /* error - no vid set */
} 

[pelican]

just do a check on the variable vid

eg.

if ( !$_GET['vid'] )
{ 
// redirect to or show error page
}

[visualAd]

just do a check on the variable vid

eg.

if ( !$_GET['vid'] )
{ 
// redirect to or show error page
}

That will produce a notice if the variable doesn't exist though.