& is a bit-wise AND. && is a logical AND. The bitwise AND will return a number, the logical AND will return true or false boolean values. It's a subtle distinction, but important. 4 & 4 == 4 4 && 4 == true == 1
Regards, Greg -- phpDocumentor http://www.phpdoc.org
James Taylor wrote:
Ok, this may have already been posted to the list already, but the archives don't seem to like the & and && characters.
I'm running into some code that looks like this:
<snip> Define('INPUT', 2); <snip> if($search->level & INPUT) $tmp.= $search->input();
Ok, what's the & mean?
As far as I could tell from the very little documentation I was able to scrape up on google, & is a bit-by-bit operator. Thus, if either INPUT or $search->level, we get TRUE... If that's the case, what's the point of using it instead of || ?
Or, do I just totally not understand the point of this. Thanks
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