a better unhtmlentities()

[Denis-de-Bernardy]

TinyMCE's Googlespell plugin contains a version of unhtmlentities that looks a little better than the one we currently use in the WP, RSS and Blogware importers.

the e regex modifier would probably need to be removed before this gets committed. some testing is in order before it's added either way.

per bforchhammer's suggestion, see #9798

importer works fine with patch applied.

re-assigning this to early 2.9, however, in case it has unexpected side effects.

+1 for having the e modifier out there.

strtr() does not look as a fitting function to, this will lead to data-loss. str_replace should do the job instead.

Replying to hakre:

strtr() does not look as a fitting function to, this will lead to data-loss. str_replace should do the job instead.

ignore that comment please, it's a mistake of mine.

reviewed and tested the patch. works.

while we're at it, there was code duplication between the patched classes so that my patch adds a base_importer class which can be inherited to compact the code.

Now that we require PHP 4.3, Theres no need at all for those functions.

Suggest closing this ticket in favour of:

#11636: enhancement: Replace unhtmlentities() methods in three importers

Patch in #11636.