can there be more documenation with a small (but working) example script on how to use this ?Some issues  (Ive seen the "same" code example in dozens of tutorials):-( I'll use capitals for emphasis only)QUESTION: what does D:T:O mean ? UNEXPLAINED.QUESTION: Do we *ONLY* use these 3 lines in a self-contained script ? Does this log ALL future MYSQL commands ?QUESTION :- Do we put that one line just- immediately after we connect to MYSQL ?- before we connect to MYSQL ?- before our suspected error ?

Here are the information about debug options on mysqli_debug()O,o:MYSQLND_DEBUG_FLUSHA,a:MYSQLND_DEBUG_APPENDF:MYSQLND_DEBUG_DUMP_FILEL:MYSQLND_DEBUG_DUMP_LINEm:MYSQLND_DEBUG_TRACE_MEMORY_CALLSn:MYSQLND_DEBUG_DUMP_LEVELo:output to fileT:MYSQLND_DEBUG_DUMP_TIMEt:MYSQLND_DEBUG_DUMP_TRACEx:MYSQLND_DEBUG_PROFILE_CALLSf:? still investigatingFor example, mysqli_debug("T:n:t:m:x:F:L:o,/tmp/client.trace");mysqlnd will write Time, Level, trace, memory calls, profile calls, File, Line to client.trace file.22:35:42.704501 ../mysqlnd_connection.c:  269   0:>mysqlnd_connection_init22:35:42.704538 ../mysqlnd_driver.c:   10   1:| >mysqlnd_driver::get_connection22:35:42.704549 ../mysqlnd_driver.c:   10   2:| | info : persistent=122:35:42.704558 ../mysqlnd_alloc.c:   21   2:| | >_mysqlnd_pecalloc22:35:42.704570 ../mysqlnd_alloc.c:   23   2:| | <_mysqlnd_pecalloc (total=3 own=3 in_calls=0)22:35:42.704602 ../mysqlnd_alloc.c:   21   2:| | >_mysqlnd_pecalloc22:35:42.704626 ../mysqlnd_alloc.c:   23   2:| | <_mysqlnd_pecalloc (total=2 own=2 in_calls=0)22:35:42.704650 ../mysqlnd_connection.c:   15   2:| | >mysqlnd_error_info_init22:35:42.704675 ../mysqlnd_connection.c:   10   3:| | | >mysqlnd_error_info::reset22:35:42.704697 ../mysqlnd_connection.c:   10   3:| | | <mysqlnd_error_info::reset (total=1 own=1 in_calls=0)22:35:42.704725 ../mysqlnd_connection.c:   16   2:| | <mysqlnd_error_info_init (total=51 own=50 in_calls=1)22:35:42.704744 ../mysqlnd_connection.c:   21   2:| | >mysqlnd_connection_state_initIf there is anything wrong, please let me know.

Looks like this manual could be referred to:http://tiebing.blogspot.com.au/2011/10/cc-dbug-library.html(I haven't tested it)