Double Dot Means what ::

[badz]

Hi friends

I'm still exploring in PHP programming with little knowledge on C ..
the mother of programming language..

Just wonder .. some times we will see some pepole use :: singn in
their code
and what it mean ?


for e.g Get::message ; <-- what the :: means.. is it some conditional
statement
because i saw a lot in Pear stlyle of coding..

[Chris Hope]

Re: Double Dot Means what ::

badz wrote:
[color=blue]
> I'm still exploring in PHP programming with little knowledge on C ..
> the mother of programming language..
>
> Just wonder .. some times we will see some pepole use :: singn in
> their code
> and what it mean ?
>
> for e.g Get::message ; <-- what the :: means.. is it some conditional
> statement
> because i saw a lot in Pear stlyle of coding..[/color]

It's a way of calling a method in a class without actually creating an
object; but because you haven't created the object you don't have
access to any of the properties that might have already been set.
Example:

class foo {

var $abc = '123';

function bar() {
print $this->abc;
}

}

You can call the method bar() like this:

$foo = new foo();
$foo->bar();

OR like this:

foo::bar();

Calling it like $foo->bar(); will print out '123' but foo::bar(); will
not. And depending on your level of error reporting, calling foo::bar()
in the above example will show an "undefined variable" error message.

--
Chris Hope - The Electric Toolbox - http://www.electrictoolbox.com/

[Senator Jay Billington Bulworth]

Re: Double Dot Means what ::

"badz" <badz22@gmail.c om> wrote in news:1110097485 .547798.187980
@g14g2000cwa.go oglegroups.com:
[color=blue]
> Hi friends
>
> I'm still exploring in PHP programming with little knowledge on C ..
> the mother of programming language..
>
> Just wonder .. some times we will see some pepole use :: singn in
> their code
> and what it mean ?
>
>
> for e.g Get::message ; <-- what the :: means.. is it some conditional
> statement
> because i saw a lot in Pear stlyle of coding..[/color]

:: is the scope resolution operator, part of PHP's object oriented
implementation. It allows you to access properties and methods of a
class, even if you haven't instantiated a member of the class. Have a
look at:

<http://www.php.net/manual/en/keyword.paamayi m-nekudotayim.php >

hth


--

Bulworth : PHP/MySQL/Unix | Email : str_rot13('f@fu ng.arg');
--------------------------|---------------------------------
<http://www.phplabs.com/> | PHP scripts, webmaster resources

[Chris Hope]

Re: Double Dot Means what ::

Chris Hope wrote:
[color=blue]
> badz wrote:
>[color=green]
>> I'm still exploring in PHP programming with little knowledge on C ..
>> the mother of programming language..
>>
>> Just wonder .. some times we will see some pepole use :: singn in
>> their code
>> and what it mean ?
>>
>> for e.g Get::message ; <-- what the :: means.. is it some
>> conditional statement
>> because i saw a lot in Pear stlyle of coding..[/color]
>
> It's a way of calling a method in a class without actually creating an
> object; but because you haven't created the object you don't have
> access to any of the properties that might have already been set.
> Example:
>
> class foo {
>
> var $abc = '123';
>
> function bar() {
> print $this->abc;
> }
>
> }
>
> You can call the method bar() like this:
>
> $foo = new foo();
> $foo->bar();
>
> OR like this:
>
> foo::bar();
>
> Calling it like $foo->bar(); will print out '123' but foo::bar(); will
> not. And depending on your level of error reporting, calling
> foo::bar() in the above example will show an "undefined variable"
> error message.[/color]

And the manual has some info about it here:

http://www.php.net/manual/en/keyword.paamayim-nekudotayim.php

--
Chris Hope - The Electric Toolbox - http://www.electrictoolbox.com/

[NSpam]

Re: Double Dot Means what ::

Senator Jay Billington Bulworth wrote:[color=blue]
> "badz" <badz22@gmail.c om> wrote in news:1110097485 .547798.187980
> @g14g2000cwa.go oglegroups.com:
>
>[color=green]
>>Hi friends
>>
>>I'm still exploring in PHP programming with little knowledge on C ..
>>the mother of programming language..
>>
>>Just wonder .. some times we will see some pepole use :: singn in
>>their code
>>and what it mean ?
>>
>>
>>for e.g Get::message ; <-- what the :: means.. is it some conditional
>>statement
>>because i saw a lot in Pear stlyle of coding..[/color]
>
>
> :: is the scope resolution operator, part of PHP's object oriented
> implementation. It allows you to access properties and methods of a
> class, even if you haven't instantiated a member of the class. Have a
> look at:
>
> <http://www.php.net/manual/en/keyword.paamayi m-nekudotayim.php >
>
> hth
>
>[/color]
essentially its a pseuedonym for $this->

[Janwillem Borleffs]

Re: Double Dot Means what ::

NSpam wrote:[color=blue]
> essentially its a pseuedonym for $this->[/color]

Not really, since this expects you to have created an instance of an object,
while Class::method can be used without prior object instantiation.. .


JW

[Michael Fesser]

Re: Double Dot Means what ::

.oO(NSpam)
[color=blue]
>essentially its a pseuedonym for $this->[/color]

Nope.

Micha

[badz]

Re: Double Dot Means what ::

ok thank guys..
so its called Scope Resolution Operator . and widely used in OOP inside
PHP

[ggg@gg.com]

Re: Double Dot Means what ::

In article <1110097485.547 798.187980@g14g 2000cwa.googleg roups.com>,
badz22@gmail.co m says...[color=blue]
> Hi friends
>
> I'm still exploring in PHP programming with little knowledge on C ..
> the mother of programming language..
>
> Just wonder .. some times we will see some pepole use :: singn in
> their code
> and what it mean ?
>
>
> for e.g Get::message ; <-- what the :: means.. is it some conditional
> statement
> because i saw a lot in Pear stlyle of coding..
>
>[/color]

You could think of it as, just calling that function w/o instantiating
the class that it's in.