php - CodeIgniter $_POST data empty

Question

First, relevant code:

---

View

<div id="search">
    <?= form_open('sheet/search') ?>

    <?= form_input('search_query', '', 'id="search_query" placeholder="Search Sheet Music"') ?>
    <?= form_submit('submit', 'Search!', 'class="hidden"') ?>

    <?= form_close() ?>
</div>

Controller sheet/search

public function search()
{
    if ($this->input->post('search_query'))
    {
    // blah
    // [ ... ]

$_POST is completely empty.

---

What on earth? The annoying thing is, other forms work perfectly fine on my website. Furthermore, this works perfectly on my testing server... so I'm guessing there's something wonky with my configuration files, .htaccess, or something. However, I don't know what could be causing it.

If you have an idea and need more information, feel free to specify. I just have no idea where to look, or what to change! Any help would be hugely appreciated.

Thanks!

---

EDIT 1/8/2013

Okay, I made a discovery. When my index page is removed from config/config.php, the search does not work. However, when it is added, it DOES work.

It still doesn't make any sense.

Below is my .htaccess file. Think I need to modify it somehow? I have absolutely no idea why it's not working still, but this is a step in the right direction.

RewriteEngine on
RewriteCond $1 !^(index.php|images|assets|sheet|robots.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Answer 1

AHA, I got it!

The problem was pretty sneaky. Apparently, because my .htaccess file was excepting the sheet directory, AND the controller had the same name, things were going screwy with the CodeIgniter paths. What, exactly, I don't know. But it was bad, apparently!

To anyone in the future with this problem... make sure your .htaccess file isn't messing with your controllers!