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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