I installed PHP 5, Apache 2, and MySQL on my Slackware 10.2 server, but ran into a few problems:

I configured Apache 2 with --enable-so.

I configured PHP with --with-apxs2=/xxx/apache2/bin/apxs --with-mysqli=/xxx/mysql/bin/mysql_config --with-mysql=/xxx/mysql/

When I run Apache I get the error
# /xxx/apache2/bin/apachectl start
httpd: Syntax error on line 232 of /xxx/apache2/conf/httpd.conf: Cannot load /xxx/apache2/modules/libphp5.so into server: /xxx/apache2/modules/libphp5.so: undefined symbol: php_escape_html_entities

I've tried every fix I could think of/find, any thoughts? Thanks in advance for your help!

Did you download fresh PHP source and try recompiling / reinstalling?

You know, as silly as it sounds, I didn't do that. Just recompiled from the source I had a few times trying different configure options. Just downloaded new source (tried the gz one this time), and just recompiled and reinstalled, and guess what? Worked first try. Thanks very much for the advice, I was hell bent on restoring the old install.

I compiled php, but then added another --with-something to configure. I then had the "undefined symbol: php_escape_html_entities" error after a 'make && make install'.

To fix the problem I had to:

make clean && make && make install