I've recently installed a RedHat Enterprise Linux server and am attempting to get PHP/MySQL installed on it. It cannot load the dynamic php mysql module, giving me an error (in /var/log/error_log) that reads as follows:

PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/mysql.so' - /usr/lib/php/modules/mysql.so: undefined symbol: executor_globals in Unknown on line 0

(In fact, it fails to load ALL of the dynamic php modules, either with the "undefined symbol: executor_global" or "undefined symbol: core_globals")

I am hoping to find someone else who is running RHEL who has come across this issue. I DO NOT WANT to compile anything -- I want to stay with stock RedHat released software.


[root@hostname-suppressed httpd]# uname -a
Linux hostname-suppressed 2.6.18-194.17.4.el5PAE #1 SMP Wed Oct 20 13:13:33 EDT 2010 i686 athlon i386 GNU/Linux

[root@hostname-suppressed httpd]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.5 (Tikanga)

[root@hostname-suppressed httpd]# rpm -qa | grep mysql
php-mysql-5.1.6-27.el5
mysql-5.0.77-4.el5_5.4
libdbi-dbd-mysql-0.8.1a-1.2.2
mysql-server-5.0.77-4.el5_5.4
mysql-connector-odbc-3.51.26r1127-1.el5
mysql-devel-5.0.77-4.el5_5.4

Even i am facing this problem in my fedora 13.....

If you get an answer please do let me know also....I am subscribing this thread.....may be we get some answers.....

I examined the content of /etc/httpd/conf.d/php.ini and noticed the following directive:

<IfModule worker.c>
# Use of the "ZTS" build with worker is experimental, and no shared
# modules are supported.
LoadModule php5_module modules/libphp5-zts.so
</IfModule>

I then remembered that I *AM* running apache in "worker mode" (to support running SiteMinder software which is a requirement). I tried replacing the libphp5-zts.so with libphp5.so, and apache failed to start, telling me, "[crit] Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP.”

This is not looking good for my "must not recompile" directive. :/

The stock RedHat php extensions are not compiled such that they are thread-safe. Foo.