What is $ v/s $$ in PHP

You have think or searched that what is $ and $$, if yes then, your search end here.

$$var  is known as reference variable where as $var is normal variable, in the same way program can create the variable name it can create any other string.

Let us take a example to understand:-

 <?php 

           $var = "Sonu";

           $$var = "Monu";

           echo $var;

           echo $$var;

           echo $Sonu;

 ?>

Output:-

Sonu
Monu
Monu

Here $var variable just only print its value Sonu, $$var is a reference it uses the value of a variable whose name is the value of $var so it's print its value Monu

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