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

. $var is a simple variable while $$var is known as reference variable. $var = “Sanjeev”; $$var = “is a PHPXperts”; $var is a simple PHP variable that we are used to. But the $$var is not very familiar like $var. It creates a variable name $Sanjeev with the value “is f PHPXperts.” Assigned . break it like this ${$var} => $Sanjeev .