#2 - As you can see (in the code below) I'm only changing the_title and looking for "exclusive" or "mp3" or both. How can I COMBINE this function?

this is my code:

# write EXCLUSIVE Correct
function writeexclusiveCorrect($content) {
$content = str_ireplace("exclusive","EXCLUSIVE", $content);
return $content;
}
add_filter('the_title', 'writeexclusiveCorrect',1);

# write MP3 Correct
function writemp3Correct($content) {
$content = str_ireplace("mp3","MP3", $content);
return $content;
}
add_filter('the_title', 'writemp3Correct',1);

And what needs to be changed in the default php.ini file?

Is there a way to show a list of all filters being loaded?

The question I have is say you do a series of plugin/function/shortcuts like this, is there an overhead?
or is there any issues with that type of plugin shortcut?

Is there any additional security or any additional code I should add to this type of simple admin-less plugin?

As is, my WriteMyPostalAddress test using dreamweaver created wysiwyg table, code just plopped in, works great!

WordPress.org in your browser and it works

That's not fully correct. It works for domain-names, which are case-insensitive by definition. But it does not work if someone had wordpress as part of their path and runs a linux/unix server (which are case sensitive when it comes to paths).

So this is really a difference:

http://example.com/wordpress
http://example.com/WordPress

They will point to different directories or fail to do so.

What I mean is, 'writeWordPressCorrect' misuses an adjective in place of an adverb. It should be 'writeWordPressCorrectly'.

Also, using preg_replace as recommended above is not a suitable replacement for high-traffic sites, since Perl-regular-expression search-and-replace is slower than string search-and-replace... it adds up.

Another option is to run those filters on saving the post. That saves alot performance.

preg_replace('/wordpress/i', 'WordPress', $content);

(untested)