Retrieving the current stack depth:
stack_depth -i 9
response:
<response command="stack_depth" transaction_id="9" depth="2"></response>
Retrieve stack information:
stack_get -i 11
response:
<response command="stack_get" transaction_id="11"> <stack where="level1" level="0" filename="file:///phpworks/dbgp-example.php" lineno="7"></stack> <stack where="{main}" level="1" filename="file:///phpworks/dbgp-example.php" lineno="10"></stack> </response>