Variable variables
$$var - this is an example of Variable variables
For example
$i = 5;
$j = “i”;
$k = $$j;
Here value of $k is 5.
And you can also create compound variables and variable functions
$str = ‘var1′;
$var1_test = “test”;
echo ${$str.’_test’}; // —– It will Print test
$str(); // —– It will Print call function var1()
${$str.’_test’}(); // —– It will Print call function test()
