If you have ever encountered an “Error 404″ message when publishing or saving a post under WordPress. It would seem that WordPress will randomly generate this error, regardless of post length or whatever. You should consult your hosting provider if this is the case, it’s probably because your webserver is configured with mod_security enabled.

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This how I got to install PHP4 and PHP5 under Ubuntu Breezy. This should also work in other distributions which have at least two different installation options for PHP. It is also possible for you to install PHP4 or PHP5 from source[¹][note1] if your distribution does not provide with you options (i.e. installing the PHP4 or PHP5 package would result in installing CLI, CGI, and Apache module versions).

Update July 6, 2006: This tutorial has been tested and is known to work under Ubuntu Linux 6.06 LTS (aka “Dapper Drake”). (more…)