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]

badz wrote:

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..

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]

"badz" <ba****@gmail.com> wrote in news:1110097485.547798.187980
@g14g2000cwa.googlegroups.com:

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..

:: 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.paamayim-nekudotayim.php>

hth
--

Bulworth : PHP/MySQL/Unix | Email : str_rot13('[e-mail]');
--------------------------|---------------------------------
<http://www.phplabs.com/> | PHP scripts, webmaster resources

[Chris Hope]

Chris Hope wrote:

badz wrote:

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..

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.

And the manual has some info about it here:
http://www.php.net/manual/en/keyword...ekudotayim.php

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

[NSpam]

Senator Jay Billington Bulworth wrote:

"badz" <ba****@gmail.com> wrote in news:1110097485.547798.187980
@g14g2000cwa.googlegroups.com:

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..

:: 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.paamayim-nekudotayim.php>

hth

essentially its a pseuedonym for $this->

[Janwillem Borleffs]

NSpam wrote:

essentially its a pseuedonym for $this->

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]

.oO(NSpam)

essentially its a pseuedonym for $this->

Nope.

Micha

[badz]

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

[ggg]

In article <11**********************@g14g2000cwa.googlegroups .com>,
ba****@gmail.com says...

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..

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