can any one tell me the exact difference between these two variables $ and $$ and where we use this Variable variables $$?

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Thanks & Regards
Sabari...

hi,
In PHP $ used for declaring a variable.
$$ - A variable variable takes the value of a variable and treats that as the name of a variable.

Here example

example 1

$a = 1
$$a = $1 = it displayed some error

example 2

$a = "a"
$$a = $a = "a"

Have you got my things!

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With,
J. Jeyaseelan
Everything Possible

hi,

Create variable by value of other variable.

$a = 'hello';

$$a = 'welcome';

> this second statment act like as follows

$ ( $a ) => $ ( 'hello' );


eg:

echo "$a $$a";

result: hello welcome