Hello,

i've try dbg-php-5.3.so of x86_64
and error message is :
[Tue Nov 26 10:51:31 2013] [notice] Apache/2.2.15 (Unix) DAV/2 mod_fcgid/2.3.9 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips SVN/1.6.11 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
Failed loading /usr/lib64/php/modules/dbg-php-5.3.so: /usr/lib64/php/modules/dbg-php-5.3.so: undefined symbol: max

PHP Version 5.3.3
System Linux webserver.greendev.fr 2.6.32-358.23.2.el6.x86_64 #1 SMP Wed Oct 16 18:37:12 UTC 2013 x86_64

What is the problem ?

Upgrade your debugger to the newer version (6.0.11 or 6.0.12), it's been fixed in those, see the other thread I posted in too, talks about it.