I'm having some difficulty installing the debugger on an Apache 2.0.55 installation. I've followed the directions to a T, here are the relevant sections of php.ini

[debugger]
debugger.enabled=on
debugger.profiler_enabled=on
debugger.hosts_allow=71.198.65.110
debugger.hosts_deny=ALL
debugger.ports=7869, 10000/16

[Zend]
zend_extension=/usr/lib/apache/dbg.so-5.1.x
zend_optimizer.optimization_level=15
zend_extension_manager.optimizer=/usr/local/Zend/lib/Optimizer-2.5.10
zend_extension_manager.optimizer_ts=/usr/local/Zend/lib/Optimizer_TS-2.5.10
zend_optimizer.version=2.5.10a
;zend_extension=/usr/local/Zend/lib/ZendExtensionManager.so
;zend_extension_ts=/usr/local/Zend/lib/ZendExtensionManager_TS.so

For some strange reason, doing a 'php -v' at the comand line I get:
PHP 5.1.4 (cli) (built: Aug 31 2006 21:58:40)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with DBG v3.1.6, (C) 2000,2006, by Dmitri Dmitrienko

But when I do a phpinfo(); call I do not get the "with DBG" line.

Any ideas?

Check if they are showing the same path to php.ini in phpinfo.

Both show /usr/local/Zend/etc/php.ini

then both should load the same extension, right?
Double check your configuration. There are no other reasons for missed extensions.

Turns out that Zend Extension Manager was having trouble itself, giving me:

Failed loading /usr/local/Zend/lib/ZendExtensionManager.so: /usr/local/Zend/lib/ZendExtensionManager.so: undefined symbol: zend_extensions
Failed loading /usr/lib/apache/dbg.so-5.1.x: /usr/lib/apache/dbg.so-5.1.x: undefined symbol: OnUpdateLong

Errors. Turns out I had compiled php with --enable-versioning. After taking that out and recompiling, it all came up perfect.

yep, there is always space for such things to happen.



Why do you need this library at all?



So it's my understanding that after your re-compiled without that command line argument, you got ZendExtensionManager.so loaded and did not experience any problems with dbg.so either. Right?

Yeah that's right, all around that --enable-versioning compile flag.