I have a device that sends data to url, depending on situations 3 sometimes 4 parameters are received, when i try to get data for 4th parameter using
$a = $_GET["xyz"];
in the case when "xyz" does not exist the function
_GET['xyz'];
returns undefined. i tried using try catch and initialized $a to a empty string in catch part but it did not work either. How can that undefined exception be handled?
If you want to check if a parameter is passed in through the URL, you can use isset()
http://php.net/manual/en/function.isset.php
This will check to see if the parameter exists
// This will evaluate to TRUE so the text will be printed.
if (isset($var)) {
echo "This var is set so I will print.";
}
You can use ternary operator
$a=(isset($_GET["xyz"]))?$_GET["xyz"]:'';
To handle such errors, you should use php's library function,
On having error such as undefined index, undefined variable etc.. will be handle by handleError function.
public function handleError($code,$message,$file,$line){
// handling
}
All the Best !!
