PHP - Multi-column Results (code Snippet Repository)

I really swear that the host I use is like screwing with me hard. Like literally will have something working one night, wake up the next day to my error log full and nothing working anymore. Or, like in this case, have the code working fine, perfectly in fact, to all of the sudden bring up all these errors and shit without changing anything I just can't figure it out.

Point being, I am working on this portal, and on the account page, you can update your info. Which for one field...

$result = queryMysql("SELECT * FROM accounts WHERE user='$user'");
   $row = $result->fetch_assoc();
$set_comp  = $row['company'];

// Check if 'Company' value is set
   if (isset($_POST['company']))
   {
      $company = sanitizeString($_POST['company']);

      if ($_POST['company'] != $set_comp)
      {
         queryMysql("UPDATE accounts SET company='$company' WHERE user='$user'");
      }
         elseif ($set_company == "")
	     {
	        queryMysql("INSERT INTO accounts (company) VALUES('$company') WHERE user='$user'");
		 }
		 elseif (empty($_POST['company']))
		 {
			$company = "";
		 }
            else 
		    {
			   $company = stripslashes($row['company']);
		    }

   }   

And the form...

<form method='post' action='account.php' enctype='multipart/form-data'>
Company:</th><td><input type='company' size='50' maxlength='40' name='company' value='$company'>
<input type='submit' value='Save Info'>
</form>

Now before it inexplicably stopped working, what it was doing and meant to do was display a form, that either had the information that was set, or displayed nothing because nothing was entered, and you could either put something there or change what was already there. Now it keeps telling me:

[22-Oct-2018 06:29:37 UTC] PHP Notice:  Undefined variable: company in /home/iqy0804tq6fq/public_html/portal/account.php on line 262

Also, sanitizeString and queryMysql are my own created functions, they work fine. I tried removing the elseif (empty($_POST['company'])), and just left the last else in, didn't work. It just displays empty columns now. Now also, when I try to update, it feeds me all these errors now my SQL syntax is wrong its LIKE HOW DID THIS CHANGE IN 10 SECONDS!!? I didn't DO anything for my syntax to be any different than when it worked perfectly! It's insanity.

  case 'deletemember':
    if (!isset($_POST['deletemember']) && !isset($confirm))
    {
      $delmembername = null;
      print eval(get_template('delete_member'));
    }
    else
    {
      if (isset($confirm) && isset($mid))
      {
        mysql_query("DELETE FROM members WHERE member_id='$mid'") or die(mysql_error());
        mysql_query("UPDATE topics SET topic_rid=0 WHERE topic_rid='$mid'")or die(mysql_error());
        mysql_query("UPDATE topics SET topic_lrid=0 WHERE topic_lrid='$mid'")or die(mysql_error());
        mysql_query("UPDATE replies SET reply_aid=0 WHERE reply_aid='$mid'")or die(mysql_error());
        show_message('Member deleted');
      }
      else
      {
        $result = mysql_query("SELECT member_id FROM members WHERE member_name='$delmembername'");
        if (mysql_num_rows($result) == 0)
          show_message('Member invalid');
        else
        {
          $mid = mysql_result($result, 0);
          $board_title = sprintf('Delete '.$delmembername.'?');
          $message = $board_title;
          $confirmed_link = '<a href="admin.php?a=deletemember&amp;mid='.$mid.'&amp;confirm=1">Delete</a>';
          print eval(get_template('confirm'));
        }          
      }
    }
    break;