Notice: Undefined variable: x in include()

Question

I used ternary operators to have multiple backgrounds with listed item.

But now I am getting this error, Error message

Notice: Undefined variable: x in include() (line 45 of /home/content/67/11380467/html/beta/sites/all/modules/custom/blogs.tpl.php).

<?php 

    $x++;   
    $class = ($x%2 == 0)? 'second': '';
    print $class; 

?>

Can you please help me understand what went wrong here and help me fix it.

Thanks!

error says $x is undefined try to define the $x=0 before increment — M Khalid Junaid
– M Khalid Junaid, Commented Jul 15, 2013 at 15:32
There isn't an include() statement here. can you show more context which includes the include() call? — Mike Brant
– Mike Brant, Commented Jul 15, 2013 at 15:32

Rene Pot · Accepted Answer · 2013-07-15 15:33:38Z

4

$x is undefined. You can't do $x++ when you didn't define it yet. You probably need to add this in front:

$x = 0;

This is assuming you want to start at 0

answered Jul 15, 2013 at 15:33

Rene Pot

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M Khalid Junaid · Accepted Answer · 2013-07-15 15:35:15Z

2

Declare

$x = 0; before $ x++; first

edited Jul 15, 2013 at 15:35

M Khalid Junaid

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answered Jul 15, 2013 at 15:33

srakl

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Jason McCreary · Accepted Answer · 2013-07-15 16:00:23Z

2

The problem is with $x++ as the included file doesn't know about $x assuming you have declared it somewhere else.

if you haven't declared $x anywhere, then it is probably a good idea to declare it $x = 0;

Alternatively, you can ignore the Notice and everything should work fine because PHP is a weakly typed language, it will auto-initialize it, but in general it is bad practice to depend on something like that. Notices are not necessarily a bug, but they usually point to one.

edited Jul 15, 2013 at 16:00

Jason McCreary

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answered Jul 15, 2013 at 15:43

user2584140

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