PHP suddenly stops working on FreeBSD

I restarted Apache this morning in order to allow some new virtual hosts to be recognised, and now I've got a problem whereby all of my PHP scripts are being served up as source code instead of being executed by the web server. I don't know why this is, as far as I'm aware I haven't changed anything PHP-related for a while and everything was running fine until this morning. Running grep php /usr/local/etc/apache2/httpd.conf Gives me:

#LoadModule php4_module        libexec/apache2/libphp4.so

DirectoryIndex index.html index.htm index.php #AddType application/x-httpd-php .php AddType application/x-httpd-php .php AddType application/x-httpd-php-source .phps So there's definitely an AddType directive for PHP scripts. If I uncomment the LoadModule line I get the error: Cannot load /usr/local/libexec/apache2/libphp4.so into server: Cannot open "/usr/local/libexec/apache2/libphp4.so" But I think that line has always been uncommented (and libphp4.so doesn't exist anywhere on the machine). I've tried rebuilding PHP, but it hasn't made any difference. Does anyone have any ideas as to what might have gone wrong? I'm at a loss as to how things could suddenly have broken when they were working fine before. Some version numbers in case it helps: php -v PHP 4.4.2 (cli) (built: May 10 2006 14:40:03) Copyright (c) 1997-2006 The PHP Group Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies httpd -v Server version: Apache/2.0.58 Server built: May 7 2006 10:42:02 Thanks in advance, Paul -- Data Circle http://datacircle.org