int(3)

int(7)
int(3)

int(7)
int(3)
int(7)
int(3)

int(7)
string(3) "bar"
int(3)
object(stdClass)#1 (1) {
  ["boo"]=>
  int(7)
}
string(4) "bang"
int(3)

called
string(1) "a"

f(0)
f(1)