Problem with passing query results to a function

[AsscBB]

Please check my process and help me understand where I'm going wrong.

I'm taking the results from a query and passing them to a function where I'm deconstructing the info in a while loop and running conditionals. Is this the right way to do this? I have comments in the code for what I think the code is doing (or at least what I want it to do) so I can also put this in my cheat sheet for future use. The code is not currently providing the output I desire. The problem I'm seeing is that I don't think the while loop is scanning through the array like I assume it is. Am I going crazy???


Thanks!

function check_fields($my_values) //this is my custom function with my array as a pass parameter.  The name does not need to be the same but I'm leaving it the same for sake of simplicity
{
	while ($my_value=$db->fetch_array($my_values)  //this while loop goes through the array entry by entry.  If there were 10 instances of field5 = $some_var from earlier, this code would be executed 10 times - once for each entry
	{
		if($my_value['field1'] == $field1_var)  //This goes to the array and runs a conditional against "field1".  The name of the fields here corresponds with the name of the fields in the origional table
		{
			//Do something for this if true
		}
		if($my_value['field2'] == $field2_var)  //Same as before but for a different table
		{
			//Do something for this if true
		}
		if($my_value['field3'] == $field3_var)
		{
			//Do something for this if true
		}
		if($my_value['field4'] == $field4_var)
		{
			//Do something for this if true
		}
		if($my_conditional == true)
		{
			return false; //if $my_conditional = true then retun a value of "false" to the calling function
		}
		else
		{
			return true; //if $my_conditional = false then retun a value of "true" to the calling function
		}
 	}
}


$my_values=$db->query("SELECT 'field1','field2','field3','field4' FROM " . TABLE_PREFIX . "demo_table WHERE field5=".$some_var);
	//$my_values is now an array that is 4 fields wide and has as many rows as the number of occurances of field5 = $some_var
if (check_fields($my_values))  //This sends the $my_values array to a custom function and expects a true or false as a return value
{
	//Do something
}