PHP - Not Printing Mysql Select Statement To Html Page?

Hi Guys

I don't know if this is possible but can someone point me in the right direction. I have a php function which takes two inputs and returns an output. for simplicity's sake let's say it's an addition function. What I want to do is use a mysql select statement to show all the rows from a database where field1 and field2 equal '3'. Here's the sort of thing I mean.

function addNumbers($one,$two) {
return $one + $two;
}

mysql_query("SELECT * FROM table WHERE 'addNumbers(field1,field2)' = '3'");

What I actually want to do is a lot more complex than this but I am trying to understand how to make the syntax work in simple terms first.

Can anybody help?

Many Thanks
Dan

Is it possible to have a loop inside a mysql select statement? If yes, can someone please give me an idea.

When I run

'select 1700-price as blah from goldclose as t2 order by dayid desc limit 1'

by itself in mysql I get a numerical result: one row, one column.

In my php script, the 1700 is actually a variable. so here it is

$changequery = sprintf("select $goldprice-price as change from goldclose order by dayid desc limit 1");
$change = mysql_query(changequery);
while ($row = mysql_fetch_array($change)) {
    printf("$row[0]"); 
}

mysql_free_result($changeresult);


I get the following error,

Warning:  mysql_fetch_array(): supplied argument is not a valid MySQL result resource in <b>/root/fuzzy/htmlmain4.php on line 99

Warning:  mysql_free_result(): supplied argument is not a valid MySQL result resource in <b>/root/fuzzy/htmlmain4.php on line 103

Not sure why? All i want is to get the result of that select statement into a variable such as $change

The code is posted he http://codepad.org/Fck5s2zz
The attached file (delete_user.php) is the same as the code in the link above.
The same code is also posted below.

[text]
What I am trying to do is create a function that will allow me to delete a user from my mysql database.

I have an HTML select that outputs the username(s) using the function get_admin_username()
(The function is posted below)

There is also a HTML form I am using to make this happen.
(Also posted below)

In other words I would select the user I would like to delete, and click submit which will then delete the user from the database.

The problem I am having is I do not know how to pass values from the HTML select, or the form, or even use the submit button value.

I am not sure If I need to create a function to achieve this.
Basically I don't know what to do this at all for that matter.

I thought I might have gotten close but I thought wrong, and failed.
I was told (in the php irc) that my method was way off and wrong but was given no help after that.

I do have an example to show you of how I tried to accomplish this, but being told that I was wrong I did not feel that it was even worth posting it.

I am lost and have been at this for two days now.  I am a noobe but I do understand allot (I think).

Someone, anyone, please help.

Thank You,

Ryan
[/text]

Code:
Code: [Select]
<?php 

   // Session's Functions
   require_once("../includes/sessions/session.php");

   // Establish A Connection To The Database
   require_once("../includes/connection/connection.php");

   // User Defined Admin Functions
   require_once("includes/functions/admin_functions.php");

   // New User Functions
   //require_once("includes/users/delete_user.php");

   // Confirms If The User Is Logged In
   confirm_logged_in(); 

   // Document Header
   include("includes/templates/default/header.php"); 

?>


<?php
   // Gets The Admin Username
   function get_admin_username() 
      {
         global $connection;
         $query = "SELECT * FROM administration_users ";
         $query .= "ORDER BY username";
         $admin_user_set = mysql_query($query, $connection);
         confirm_query($admin_user_set);

         while ($admin_users = mysql_fetch_array($admin_user_set)) 
            {
               echo "<option value=\"username" . "\">" . $admin_users['username'] ."\n  ";
            } 
      }
?>


      <table id="structure">
         <tr>
            <td id="navigation">
               <a href="../staff.php">Return To Staff Menu</a>
               <a href="admin_content.php">Return To Admin Menu</a>
<br />
<br />
               <ul class="menu">
                  <li class="pages"><a id="page_menu" href="new_user.php">Add New User</a></li>
                  <li class="pages"><a href="edit_user.php">Edit User</a></li>
                  <li class="pages"><a href="list_users.php">List Users</a></li>
                  <li class="pages"><a href="delete_user.php">Delete User</a></li>
               </ul>
            </td>

            <td id="page">
               <h2>Remove User</h2>

<br />

               <form action="delete_user.php" name="delete_user" method="post">
                  <table>
                     <tr>
                        <th class="field_name field_padding_user_name">User Name: &nbsp;</th>

                        <td>
                           <select id="select_username" name="username_select">
                              <?php echo get_admin_username();?>
                           </select>
                        </td>
                     </tr>

                     <tr>
                        <td class="delete_user_submit" colspan="2"><input type="submit" name="submit" value="Delete User"
                             onclick="return confirm('Are You Sure You Want To Delete This User?');"/></td>
                     </tr>
                  </table>
               </form>
            </td>
         </tr>
      </table>


<?php 

   // Document Footer
   include("includes/templates/default/footer.php");

?>

MOD EDIT: [code] . . . [/code] tags added.

I have two tables...one is scheduled_umps and one is games.  Both tables have a column 'game_id'. 

I need to select how many games a person is scheduled for in a given time frame.

Here's what I have for the select...and it's not working (You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE scheduled_umps.ump_id = '34' AND games.game_id = scheduled_umps.game_id AN' at line 1)

Code: [Select]
<?php
$today_is_this_date = date('Y-m-d');
$four_months_ago = date('Y-m-d', strtotime('-4 months', strtotime($today_is_this_date)));
$four_months_from_now = date('Y-m-d', strtotime('+4 months', strtotime($today_is_this_date)));

/// How many games have you worked? 
//$query = "SELECT COUNT(ump_id) FROM scheduled_umps WHERE `ump_id` = '$_SESSION[ump_id]'";   ///this one selects how many games you've worked NO MATTER WHAT THE DATE

$query = "SELECT scheduled_umps.game_id, games.game_id, COUNT(scheduled_umps.ump_id) WHERE scheduled_umps.ump_id = '$_SESSION[ump_id]' AND games.game_id = scheduled_umps.game_id AND games.game_id BETWEEN $four_months_ago AND $four_months_from_now";

$result = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_array($result)){
echo "You have been scheduled on <b>". $row['COUNT(ump_id)'] ."</b> dates for the $_SESSION[association_name].";
}
?>
[\code]

Any ideas where I'm going wrong?  Thanks for the help...I HATE multi-table selects!