The humble tilde (~). I came across it the other day in some PHP code

~E_ERROR

I'm curious, can't find any documentation on it. In math it refers to
propostional logic, is it the same thing in PHP ?

> The humble tilde (~). I came across it the other day in some PHP code
>

~E_ERROR

>
> I'm curious, can't find any documentation on it. In math it refers to
> propostional logic, is it the same thing in PHP ?

~ $a Not Bits that are set in $a are not set, and vice versa.

http://hu.php.net/manual/en/language...rs.bitwise.php

greets,
Zoltán Németh

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2008/4/8 Németh Zoltán <znemeth@alterationx.hu>:
> > The humble tilde (~). I came across it the other day in some PHP code
> >

~E_ERROR

> >
> > I'm curious, can't find any documentation on it. In math it refers to
> > propostional logic, is it the same thing in PHP ?
>
> ~ $a Not Bits that are set in $a are not set, and vice versa.
>
> http://hu.php.net/manual/en/language...rs.bitwise.php
>
> greets,
> Zoltán Németh

You are right, of course, but it is a good question of how one who is
totally unfamiliar with bitwise syntax in any language might ever find
that. For people learning the language, it's not like they can type a
tilde character into the documenation search and get results. Same for
the other operators. I suppose if one thinks to search for the word
'operators', one would get there eventually.

I remember how thrown I was years ago when I first tried ^ in PHP,
having first learned good ol' MS-DOS BASICA years ago, and thinking
that I was raising x to the power of y. :-)


Andrew

PS - For kicks, I just searched for the word 'tilde' and it returned
the delete() function. :-O