Unknown Syntax

Does anybody recognize this:

!==

with 2 '='

Ive known != to mean not equal to but i'm just looking at someone elses
script and they use this instead. Does anyone know if this works or any
problems with it?

Cheers

two equal signs means 'equal to'
so '!==' means 'not equal to'
one equal sign sets a value.
ie...
x = 2; // x is set to the value of 2

if(x!==3) // checks if the value of x is not equal to 3

as for != i've never seen it with just one equal sign...


"Chris Morrow" <chris.morrow@btopenworld.com> wrote in message
news:20030711125539.71628.qmail@pb1.pair.com...
> Does anybody recognize this:
>
> !==
>
> with 2 '='
>
> Ive known != to mean not equal to but i'm just looking at someone elses
> script and they use this instead. Does anyone know if this works or any
> problems with it?
>
> Cheers
>
>

I Found this on the PHP.net site, maybe it will clear things up. Thanks for
your help everyone.

Example Name Result
$a == $b Equal TRUE if $a is equal to $b.
$a === $b Identical TRUE if $a is equal to $b, and they are of the
same type. (PHP 4 only)
$a != $b Not equal TRUE if $a is not equal to $b.
$a <> $b Not equal TRUE if $a is not equal to $b.
$a !== $b Not identical TRUE if $a is not equal to $b, or they are not
of the same type. (PHP 4 only)
$a < $b Less than TRUE if $a is strictly less than $b.
$a > $b Greater than TRUE if $a is strictly greater than $b.
$a <= $b Less than or equal to TRUE if $a is less than or equal to
$b.
$a >= $b Greater than or equal to TRUE if $a is greater than or equal
to $b.


Cheers,
Chris


"Erythros" <erythros@erythros.com> wrote in message
news:20030711131515.92921.qmail@pb1.pair.com...
> two equal signs means 'equal to'
> so '!==' means 'not equal to'
> one equal sign sets a value.
> ie...
> x = 2; // x is set to the value of 2
>
> if(x!==3) // checks if the value of x is not equal to 3
>
> as for != i've never seen it with just one equal sign...
>
>
> "Chris Morrow" <chris.morrow@btopenworld.com> wrote in message
> news:20030711125539.71628.qmail@pb1.pair.com...
> > Does anybody recognize this:
> >
> > !==
> >
> > with 2 '='
> >
> > Ive known != to mean not equal to but i'm just looking at someone elses
> > script and they use this instead. Does anyone know if this works or any
> > problems with it?
> >
> > Cheers
> >
> >
>
>