Eventually the intention is to build a real debugger into phpmole

the likely candidate is the dbg extension from

http://dd.cron.ru/dbg/

the trick is working out what the protocol does - 

so far this is the analysis:

The startup issues

    header_structure
    4 bytes      sync = ( 00 00 59 53 ) ;
    4 bytes      cmd = (00 00 00 12) = see commands from dbg_net.h ;					/* command one of DBGC_xxxx, DBGR_xxxx, DBGA_xxxx */
    4 bytes      flags (00 00 00 01) ?? not sure what thats for
    4 bytes      bodysize (00 00 00 10) = eg. 16 bytes (hex)

initiall send
        00 00 59 53 00 00 00 12  00 00 00 01 00 00 00 10 
        00 01 8a 24 00 00 00 08  00 00 00 00 00 00 00 02
        
        translates to command DBGC_SID send session id
        
        then of 16 bytes of ???? dont know what this is - session id ?
        
        00 00 59 53 00 00 00 01  00 00 00 05 00 00 02 df   
        
        translates to command DBGC_STARTUP send startup date
        flag =5
        size =02df
        It then appears to dump the DBG global vars..!