Script for correcting corrupted serialized data

[oricgn]

When database encoding changed from single to multibyte character set unserialize function fails for data with multibyte characters if database content is not converted too.

We need a script to correct corrupted serialized data.

The script is quit simple:

• loop through all messages (see scripts/rebuild_thread_info.php as example)
• try to unserialize the meta data
• catch the error and fix the serialized data with a preg_replace (like we did in this commit 1778174)

We need to run the script against the support forums on phorum.org!