Why get works before being declared in variable?

[Bentley4]

I don't understand why "if(isSet($_GET['sid'])) " works before it is declared in the variable name(" $name = $_GET['sid'];"). 1. How does php store the date in this get statement? 2. Is GET an array?

 

 if(isSet($_GET['sid'])) 
{
     echo "<h2>Exercise</h2>";

      $name = $_GET['sid'];
      $timein = time();
      $quest=1;
      $nextquest=2;

} else {
    echo "<h2>Enter Student Number:</h2>";
    $quest=0;
    $nextquest=0;
}

[MasterACE14]

$_GET['sid']; comes from the URL.

 

page.php?sid=something

[jonsjava]

_GET is a Superglobal, which means it is always available in all scopes.

[trq]

I don't understand why "if(isSet($_GET['sid'])) " works before it is declared in the variable name(" $name = $_GET['sid'];").

 

You seem to misunderstand how variable assignment works. Data is assigned to the item on the left of the = assignment operator, not the right. That means, in your example above the variable $name is being assigned the value from $_GET['sid'] not the other way around.

[Bentley4]

Thnx, I think I understand now!