$_GET and FILTER_VALIDATE_URL, tell if $_GET exists

Question

When I run

if (filter_var($_GET['abc'], FILTER_VALIDATE_URL)) { ... }

and I don't give a ?abc= extension to my .php then I get notice:

Notice: Undefined index: abc in line...

Is there a way to bypass this notice and say if $_GET exists and then is abc then...

Thanks a lot

What prevented you from consulting the PHP manual? – Lightness Races in Orbit Oct 01 '14 at 11:29 — Lightness Races in Orbit, Oct 01 '14 at 11:29

score 4 · Answer 1 · answered Oct 01 '14 at 11:26

4

You have to test if key abc in GET exists, so:

if (isset($_GET['abc']) && filter_var($_GET['abc'], FILTER_VALIDATE_URL)) { ... }

answered Oct 01 '14 at 11:26

pavel

peterpeterson · Answer 2 · 2014-10-01T11:32:33.020

3

if (isset($_GET['abc']) && filter_var($_GET['abc'], FILTER_VALIDATE_URL)) { ... }

This way it checks if that exist and you won't get a notice , hope this help :)

edited Oct 01 '14 at 11:32

answered Oct 01 '14 at 11:26

peterpeterson

score 3 · Answer 3 · answered Oct 01 '14 at 11:26

3

you have to check whether the index is set using isset

if (isset($_GET['abc']) && filter_var($_GET['abc'], FILTER_VALIDATE_URL))

answered Oct 01 '14 at 11:26

Mithun Satheesh

3 Answers3