(PECL apd >= 0.2)
apd_breakpoint — Stops the interpreter and waits on a CR from the socket
$debug_level
   )This can be used to stop the running of your script, and await responses on the connected socket. To step the program, just send enter (a blank line), or enter a php command to be executed.
debug_levelUn integer formato sommando le costanti XXX_TRACE.
Non è raccomandato
usare MEMORY_TRACE. È molto lento e non è accurato.
ASSIGNMENT_TRACE non è ancora implementata.
Per accendere tutte le tracce funzionali (TIMING, FUNCTIONS, ARGS SUMMARY (come strace -c)) utilizzare il valore 99
   Restituisce TRUE in caso di successo, FALSE in caso di fallimento.
  
Example #1 Typical session using tcplisten
bash#tcplisten localhost 7777
APD - Advanced PHP Debugger Trace File
---------------------------------------------------------------------------
Process Pid (6118)
Trace Begun at Sun Mar 10 23:13:12 2002
---------------------------------------------------------------------------
(  0.000000): apd_set_session_trace called at /home/alan/Projects/project2/test. 
php:5
(  0.074824): apd_set_session_trace_socket() at /home/alan/Projects/project2/tes 
t.php:5 returned.  Elapsed (0.074824)
(  0.074918): apd_breakpoint() /home/alan/Projects/project2/test.php:7
              ++ argv[0] $(??) = 9
apd_breakpoint() at /home/alan/Projects/project2/test.php:7 returned.  Elapsed ( 
-2089521468.1073275368)
>\n 
statement: /home/alan/Projects/project2/test.php:8
>\n 
statement: /home/alan/Projects/project2/test.php:8
>\n 
statement: /home/alan/Projects/project2/test.php:10
>apd_echo($i);
EXEC: apd_echo($i);
0
>apd_echo(serialize(apd_get_active_symbols()));
EXEC:  apd_echo(serialize(apd_get_active_symbols()));
a:47:{i:0;s:4:"PWD";i:1;s:10:"COLORFGBG";i:2;s:11:"XAUTHORITY";i:3;s:14:"
COLORTERM_BCE";i:4;s:9:"WINDOWID";i:5;s:14:"ETERM_VERSION";i:6;s:16:"SE
SSION_MANAGER";i:7;s:4:"PS1";i:8;s:11:"GDMSESSION";i:9;s:5:"USER";i:10;s:5:"
MAIL";i:11;s:7:"OLDPWD";i:12;s:5:"LANG";i:13;s:10:"COLORTERM";i:14;s:8:"DISP
LAY";i:15;s:8:"LOGNAME";i:16;s:6:"
>apd_echo(system('ls /home/mydir'));
........
>apd_continue(0);