Branch Coverage

• Measures whether the boolean expression of each control structure evaluated
  to both TRUE and FALSE during execution.

array(
'file' => array(
line => array(
array(
'opcode' => (constant),
'flag' => (int)
'states' => (bitfield)
),
)
)
)

Path Coverage

• Measures whether each of the possible paths in each function or method has
  been followed. A path is a unique sequence of branches from the entry of the
  function or methods to its exit.