What is the output of this code?

Question

$a=‘b’;
$b=‘L’;
$ab=‘a’;
echo ‘he’;
echo $$ab.$b;
echo ‘o’;

Answer 1

Thanks you so very much .You can right explain now.You are clever.😊😊😊😊

Answer 2

Why don't you try it yourself on code playground

Answer 3

When $ab leads to $a cause $ab is 'a' and in php you can refere to another variable with that so $ab is 'b'

Answer 4

he$a.Lo -> he$b.Lo -> heLLo

Answer 5

Thank you so very much.

Answer 6

I don’t understand. So ,Can you help me? explain😇😇😇😇😇