Manipulating Query String

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)

You can acces the whole query string using the following:

PHP Code:

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$qs = $_SERVER['QUERY_STRING']; 


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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:

PHP Code:

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


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just do a check on the variable vid

eg.

Code:

---

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

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Quote:

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Originally Posted by pelican

just do a check on the variable vid

eg.

Code:

---

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

---

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