PHP magic methods example

Question

I have this question from the Zend PHP study guide and can\'t find a proper explanation...

Answer 1

Since __get() calls echo, some data is being outputted before the echo outside of the class gets called.

Stepping through the first line with echo, this is how it gets executed:

$m->a   "A" is concatenated
","     "," is concatenated
$m->b   "b," is echoed, "B" is concatenated
","     "," is concatenated
$m->c   "c," is echoed, "C" is concatenated
"m"     "," is concatenated

At this point, b,c, has already been echoed, and the string with the value of A,B,Cm is now displayed.