apd_set_session_trace Starts the session debugging &reftitle.description; voidapd_set_session_trace intdebug_level stringdump_directoryini_get("apd.dumpdir") Starts debugging to apd_dump_{process_id} in the dump directory. &reftitle.parameters; &apd.debug-level.description; dump_directory The directory in which the profile dump file is written. If not set, the apd.dumpdir setting from the &php.ini; file is used. &reftitle.returnvalues; &return.void; &reftitle.examples; ]]>