What is the difference between $name and $$name?

[chinmay.sahoo]

$name is variable where as $$name is reference variable like $name=Shwetank and $$name=Gupta so $Shwetank value is Gupta. Example:

$name "Shwetank"; $$name gupta; echo $$name;

 

[umesh11]

$name is variable where as
$$name is reference variable like $name=shikha
and $$name=singh so $sikha value is singh

 

[ravikumar007]

What is the difference between $name and $$name?

$$var uses the value of the variable whose name is the value of $var.
It means $$var is known as reference variable whereas $var is normal variable.
It allows you to have a “variable’s variable” – the program can create the variable name the same way it can create any other string. As example:

<?PHP

$name="Sharique";

$$name="Vishal";

echo $name."<br/>";

echo $$name."<br/>";

echo $Vishal;

?>

Output
Sharique
Vishal
Vishal

 

[codinsights]

great answer by ravikumar007 i compltely agree with him .

 

[zozoreview]

Simplest you just run it to see results

 

[tuantuanhminh]

You can try : PHP: Variable variables - Manual
I think it very useful !