[SOLVED] ($string != 0) evaluates to false? Why?

[Laogeodritt]

Hello,

 

I recently encountered what seems to me as an odd behaviour in one of my scripts. Although I've quite easily fixed the problem, I can't figure this behaviour out at all, which is contrary to what I'd expect; I'd like to understand the reason behind it.

 

For a non-empty, non-numeric string $var, the expression ($var != 0) seems to always evaluate to FALSE. I would have expected any non-empty non-zero string to cause this expression to evaluate to TRUE. Can anyone explain why PHP evaluates this expression like this?

 

Thanks,

Laogeodritt

[DragonFire-N[R]]

http://us.php.net/manual/en/types.comparisons.php

 

Perhaps this can explain why PHP does what it does

[Laogeodritt]

... ack.

 

I actually thought about those tables, but I only remembered the various variations of 1, 0, TRUE, FALSE and -1 being on there.

 

Thanks for the reply ... and for not yelling at me. XD;

[.josh]

As to why....

 

http://us.php.net/manual/en/types.comparisons.php#49327

[Laogeodritt]

Ah... all right, thanks, both of you. ^^;