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<Other incompatibilitiesUsing the Debugger>
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Last updated: Thu, 21 Aug 2003

Appendix D. Debugging PHP

About the debugger

PHP 3 includes support for a network-based debugger.

PHP 4 does not have an internal debugging facility. You can use one of the external debuggers though. The Zend IDE includes a debugger, and there are also some free debugger extensions like DBG at, the Advanced PHP Debugger (APD) or Xdebug which even has a compatible debugger interface as PHP 3's debugging functionality as is described in this section.

add a note add a note User Contributed Notes
Debugging PHP
tulpe at atomar dot de
07-Feb-2003 11:09
Tired of manualy printing out your variables and arrays for debugging?

Take a look at my debuglib at:

Happy debugging!

Thomas Schler
joe_fitchnospam at hotmail dot com
18-Dec-2002 04:15
I've tried many debuggers and PHP IDEs including Zend IDE, Komodo, PHPEdit, PHPEd and Maguma Studio.
 After all I'm sure that the best one debugger is dbg. It supports breakpoints even conditional ones,  all kind of steps throu php code, watch etc, so it's a fully functional debugger indeed and profiler too. Fortunately, it's an open-source product as PHP itself. Unfortunately, it does not contain any front-end, but 3rd party PHP IDEs. Seems, as for an IDE the best one is PHPEd 3.1 (, former PHP IDE from Ergin Soysal.
I was also deeply impressed with IonCube accelerator performance ( Commercial version of IONCUBE is many times faster than the commercial one from Zend ( Huh ?
Hope this info would help someone to find the better way faster.
23-Aug-2002 01:51
check out this great, cross-platform, my favourite php debugger:

it not only allows "debugging PHP programs locally or remotely, including debugging in CGI or other Web Server API environments", but, besides, is a full fledged Perl, PHP, Python, Tcl, and XSLT IDE. based on mozilla.

current version 1.2.9 costs some money ($29.50 non commercial), previous version 1.1 is free (non commercial).
dima at NOSPAM dot kde dot org
17-Jun-2001 10:46
Both php3 and php4 ( dbg extention ) are supported by Quanta Plus ( )<br>
It's a full featured IDE for Unix ( KDE )
which supprt PHP too.
steve at stevedix dot de
09-Mar-2001 11:05
There is actually a symbolic debugger for php4 : BIKE.

It only works on unix/linux, and is a bit limited, but it's better than the existing (rather limited) system and typing tons of echos.

See it at :
bob at bobbydigital dot fsnet dot co dot uk
27-Oct-2000 08:12
want a simple way to get errors from php?

from the command line simply type:

"/path-to-php/php.exe your-php-file.php3"

and It'll throw back useful errors

use -q option before the filename to Suppress HTTP Header output.
jruskiewicz at techtracker dot com
26-Sep-2000 04:19
[Ed: Note: Python loop control is managed through indentation, so you will need to reindent this errata note]
python remote debug listener...

#Used for remote debugging of PHP programs.
from socket import *;

#connect and bind to the port
s = socket(AF_INET, SOCK_STREAM);

#little info to print out
print "PHP Remote Debug Application";

#let us try this thing...
    while 1:
        client, addr = s.accept();
        tmp = client.recv(1024);
        while tmp:
            print tmp, "\n";
            tmp = client.recv(1024);
    print "Exit";
cbarnett at crossbeam dot com
08-Jul-2000 10:22
I'm copying this note from a post I found on Geocrawler.  I think Thierry diserves a round of applause for actually posting something useful, so...


I'm going to add some syntax highlighting to the code to make it cute, and then we'll see.

FROM: Thierry Boudet
              DATE: 12/01/1998 01:35:21
              SUBJECT: RE:  [PHP3] [php3] get the debug info

              Rui Barreiros a 嶰rit:
              > how can i get the debug info that the php3 sends to port 2000 (in my
              > case)

              #!/usr/bin/perl -w

              use Socket;
              $port = 7869;           # PHP debugger
              my $proto = getprotobyname('tcp');

              socket(Server, PF_INET, SOCK_STREAM, $proto)
                                         or die "socket: $!";
              setsockopt(Server, SOL_SOCKET, SO_REUSEADDR, pack("l",1))
                                         or die "setsockopt: $!";
              bind(Server, sockaddr_in($port, INADDR_ANY))
                                         or die "bind: $!";
              listen(Server, SOMAXCONN);

              for ( ; $paddr = accept(Client, Server); close Client)
                  my ($port, $iaddr) = sockaddr_in($paddr);
                  my $name = gethostbyaddr($iaddr, AF_INET);
                  print "-------------  $name  $port --------";
                  while (<Client>)        {  print;   }

<Other incompatibilitiesUsing the Debugger>
 Last updated: Thu, 21 Aug 2003
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