0 vs false

So, this was driving me insane today, and I'm sure there's an easy
answer that I'm just missing.

Say I have an expression where 0 is acceptable as a TRUE response. But
how, in PHP, do I say that 0 = true since it treats 0 = FALSE = "".
For example, if I look for "foo" in a string using strpos:

if (strpos("foo bar", "foo")) {
   echo "foo found at the beginning of the phrase.";
}

This should evaluate to TRUE, but it doesn't since it finds "food" at
position 0, which then evaluates to FALSE.

I tried casting, isset, is_null, and a few other siller options. I
eventually worked around it by using substr_count, but mostly I'm just
curious about the general answer to the question.

Thanks.
Received on Mon May 1 03:02:38 2006