# if ($a == 1) { $b++; }

################
#    start     #
################
  |
  |
  v
+--------------+
| if ($a == 1) | -+
+--------------+  |
  |               |
  | true          |
  v               |
+--------------+  |
|    $b++;     |  | false
+--------------+  |
  |               |
  |               |
  v               |
################  |
#     end      # <+
################
