I'm a beginner in Joomla and a little confused with this method.

for example consider this : $app->input->get('foo',0,'int');

where is the source of foo ?

JInput->get() get's inputs from where ?

1 Answer 1


Source of foo are the PHP superglobals such as $_POST or $_GET. So it's data what the user submits via a form, URL or cookie to your component.

So you are receiving in a safe way a parameter that was sent to you via a HTTP method.


$myVar = $app->input->get('foo',0,'int');

is largely equivalent to:

$myVar = (int) $_REQUEST['foo'];

You should always use JInput, no matter what. You just forget about the PHP superglobals. Read the whole documentation in silence, you should know it by heart.

  • To avoid any warning, it's better to check if $_REQUEST['foo'] is set: $myVar = isset($_REQUEST['foo'] ? (int) $_REQUEST['foo'] : 0;
    – Farahmand
    Commented Aug 27, 2014 at 7:27
  • What warning? The code with request is just an example, not something to use. Commented Aug 27, 2014 at 7:31
  • Yes, my comment is about a general PHP rule to avoid PHP warnings and not a Joomla one. I wanted to say that $myVar = $app->input->get('foo',0,'int'); is equivalent to $myVar = isset($_REQUEST['foo'] ? (int) $_REQUEST['foo'] : 0;.
    – Farahmand
    Commented Aug 27, 2014 at 7:42

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