php version 5.3.19 empty() issue

Question

I have written a Joomla extension that counts traffic and I recently ran into a strange issue. I normally use

if (empty($items) AND ($bot == 0) AND ($iplock == 0))

and it worked fine until recently one of the uses sent me a message explaining that the system didn’t count unless he changed it to this.

$ei = empty($items) AND ($bot == 0) AND ($iplock == 0);

if ($ei == 1)

He is using PHP version 5.3.19 on his web server, can anyone explain why the second would work but the first wouldn't.

Thanks

Marko D · Accepted Answer · 2013-03-09 15:09:22Z

4

The two statements are not equal

Second statement is evaluated like this

($ei = empty($items)) AND ($bot == 0) AND ($iplock == 0);

because $items are empty, $ei get value 1.

Do not use AND operator, it has lower precedence than =, use &&

answered Mar 9, 2013 at 15:09

Marko D

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1 Comment

Thanks what you said make sense.