Can someone better explain increment/decrement operators?

Question

ok so i know that $var++ means $var=$var+1
but if you like say:
$var1=1;
$var2=$var1++;
why is it turning into var1 having the value of 2 and var 2 having the value of 1?
is it assigning the value of var1 to var2, then increments it?

Answer 1

yes, correctly.

Answer 2

$var2=$var1++;
here 2 operators are used one is assignment (=) which is used to assign the value of var1 to var2 and then second operator(++) is used to increment the var1 value.
there are 2 types of increment operator
1. post increment(var++) which will increment after the operation completed.(means first assign the value then increment)
2.Pre increment(++var) which will increment first and then complete the operation