Find sum?

[esiason14]

Each week is assigned a different $defpt_modifier and $defyd_modifier based on certain values. How can I find the total of the returned $defpt_modifier and $defyd_modifier?

$week = array(1,2,3);
$data = array(25, 40, 10);
$data4 = array(320, 199, 425);
$countwk = count($week);


  for($i=0;$i<$countwk;$i++)
  {
      if ($data4[$i] > 399) 
     {  

	 $defyd_modifier = -5;
     }	    

     elseif ($data4[$i] > 349 && $data4[$i] < 400) 
     {  

	 $defyd_modifier = -3;
     }		    

     elseif ($data4[$i] > 299 && $data4[$i] < 350) 
     {  

	 $defyd_modifier = 0;
     }	
     elseif ($data4[$i] > 249 && $data4[$i] < 300) 
     { 
	 $defyd_modifier = 3;
     }		    

     elseif ($data4[$i] > 199 && $data4[$i] < 250) 
     {  

	 $defyd_modifier = 5;
     }	    

     elseif ($data4[$i] > 149 && $data4[$i] < 200) 
     {  

	 $defyd_modifier = 7;
     }	    

     elseif ($data4[$i] > 99 && $data4[$i] < 150) 
     {  

	 $defyd_modifier = 9;
	 }	    

     elseif ($data4[$i] > -1 && $data4[$i] < 100)
     {  

	 $defyd_modifier = 12;
     }
     if ($data[$i] > 34) 
     {  

	 $defpt_modifier = -5;
     }	
     elseif ($data[$i] > 27 && $data[$i] < 35) 
     {  

	 $defpt_modifier = -3;
     }	     

     elseif ($data[$i] > 20 && $data[$i] <  28) 
     {  

	 $defpt_modifier = 0;
     }	     

     elseif ($data[$i] > 13 && $data[$i] < 21) 
     {  

	 $defpt_modifier = 2;
     }	
     elseif ($data[$i] > 6 && $data[$i] < 14) 
     {  

	 $defpt_modifier = 4;
     }	
     elseif ($data[$i] > 0 && $data[$i] < 7) 
     {  

	 $defpt_modifier = 6;
	 }	
     elseif ($data[$i] == 0) 
     {  

	 $defpt_modifier = 10;
	 }	

echo "Week $week[$i], ptmod = $defpt_modifier ($data[$i]), ydmod = $defyd_modifier ($data4[$i])<br>";
 }

[devinemke]

$week = array(1,2,3); 
$data = array(25, 40, 10); 
$data4 = array(320, 199, 425); 
$countwk = count($week); 
$defyd_total = 0;
$defpt_total = 0;

for ($i=0; $i < $countwk; $i++)
{ 
	if ($data4[$i] > 399) {$defyd_modifier = -5;}         

	elseif ($data4[$i] > 349 && $data4[$i] < 400) {$defyd_modifier = -3;}             

	elseif ($data4[$i] > 299 && $data4[$i] < 350) {$defyd_modifier = 0;}     

	elseif ($data4[$i] > 249 && $data4[$i] < 300) {$defyd_modifier = 3;}             

	elseif ($data4[$i] > 199 && $data4[$i] < 250) {$defyd_modifier = 5;}         

	elseif ($data4[$i] > 149 && $data4[$i] < 200) {$defyd_modifier = 7;}         

	elseif ($data4[$i] > 99 && $data4[$i] < 150) {$defyd_modifier = 9;}         

	elseif ($data4[$i] > -1 && $data4[$i] < 100) {$defyd_modifier = 12;} 

if ($data[$i] > 34) {$defpt_modifier = -5;}     
elseif ($data[$i] > 27 && $data[$i] < 35) {$defpt_modifier = -3;}          
elseif ($data[$i] > 20 && $data[$i] <  28) {$defpt_modifier = 0;}          
elseif ($data[$i] > 13 && $data[$i] < 21) {$defpt_modifier = 2;}     
elseif ($data[$i] > 6 && $data[$i] < 14) {$defpt_modifier = 4;}     
elseif ($data[$i] > 0 && $data[$i] < 7) {$defpt_modifier = 6;}     
elseif ($data[$i] == 0) {$defpt_modifier = 10;}

$defyd_total += $defyd_modifier;
$defpt_total += $defpt_modifier;

echo "Week $week[$i], ptmod = $defpt_modifier ($data[$i]), ydmod = $defyd_modifier ($data4[$i])<br>";
}


echo '<br>defyd_total = ' . $defyd_total . '<br>defpt_total = ' . $defpt_total;

[esiason14]

Thank you very much!

[esiason14]

If i add another array to this:

$year = array (2003, 2004, 2005);

How would I find the totals for each within the given year (the sum of all weeks within a year)?