php extension works with CLI, segmentation fault with apache

I built a PHP extension using SWIG. It is a shared lib that I placed in my php project on my linux box. The project lives in the directory /var/www/my_web and the extension shared lib is placed in /var/www/my_web/resources/library/.

In the file /etc/php5/cli/php.ini, I added the line:

extension=/var/www/my_web/resources/library/my_lib.so

In开发者_开发问答 the file /etc/php5/apache2/php.ini, I added the line:

extension=/var/www/my_web/resources/library/my_lib.so

I have a test php page that does the following...

print_r(get_loaded_extensions());
print_r(get_extension_funcs("my_lib"));

If I run that test page through the cli PHP, everything is fine. I get html that I could even save and open in a browser. Looks good. However, if I actually browse to the page, I get:

[Fri Jan 07 11:37:18 2011] [notice] child pid 3918 exit signal Segmentation fault (11)
[Fri Jan 07 11:37:18 2011] [notice] child pid 3919 exit signal Segmentation fault (11)

in the apache log.

Other parts of my_web work just fine, but this test page does not. The other thing I noticed is that if I only do print_r(get_loaded_extensions()); without the other line, it works in apache and I do see my_lib listed as a loaded extension. So, it seems only when I try to access my_lib in apache do problems occur.

I am using php 5.3.2, apache 2.2.14, and swig 2.0.1.

Please, any suggestions or comments are greatly appreciated.

Thanks.

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Did you link your extension with libraries also linked to Apache, but different versions/paths? Try looking at what apache has loaded with e.g. lsof or pmap and compare to ldd of your extension.