using foreach and while loop together - php

Question

I have an array year_values containing some values like
$year_values = array();
foreach($year_strings as $str) {
$year_values[] = explode(",", $str);
}
then I apply a query for extracting some values from database
$sql = "SELECT inventory.holdingcost as holdingcost,
inventory.ordercost as ordercost, inventory.unitprice as unitprice,
inventory.lead_time as lead_time, items.id as iid
FROM inventory, items
WHERE inventory.item_name = items.item_name";
mysql_error();
$result = mysql_query($sql);
foreach($year_values as $vals) {
while ($row = mysql_fetch_row($result)) {
$w = $row[2];
$e = $row[0];
$r = $row[1];
$tt = $row[3];
$eo = sqrt(2 * $vals[5] * $r / ($e * $w));
$eoq = round($eo, 1);
$ro = $vals[5] / 360;
$rop = round($ro * $tt);
$op = round($vals[5] / $eoq, 1);
$cc = round(89 / $op);
$h = round((($eoq * $e * $w) / 2), 2);
$o = round((($r * $vals[5]) / $eoq), 2);
$z = round($h + $o, 2);
}
}
When I use foreach above while loop it just takes first value of $year_values as $vals[5], I want to make computations inside while for every value of array $year_values.
How to correct it?
repetition is occurring in value1 i.e $val[5] currently:
Value1 Value 2 Value 3
199 202 0.25
199 205 0.25
199 210 0.25
199 230 0.25
1698 202 0.25
1698 205 0.25
1698 210 0.25
1698 230 0.25
instead i want the values to be displayed like
Value1 Value 2 Value 3
199 202 0.25
1698 205 0.25
15 210 0.25
971 230 0.25

Answer 1

I guess you just have to store all your data, so you could reuse it.
$result = mysql_query($sql);
$rows = array() ;
while ($row = mysql_fetch_row($result)){
$rows[] = $row ;
}
foreach($year_values as $vals) {
foreach($rows as $row){
$w = $row[2];
$e = $row[0];
$r = $row[1];
$tt = $row[3];
$eo = sqrt(2 * $vals[5] * $r / ($e * $w));
$eoq = round($eo, 1);
$ro = $vals[5] / 360;
$rop = round($ro * $tt);
$op = round($vals[5] / $eoq, 1);
$cc = round(89 / $op);
$h = round((($eoq * $e * $w) / 2), 2);
$o = round((($r * $vals[5]) / $eoq), 2);
$z = round($h + $o, 2);
}
}

Answer 2

Simply reverse the statements:
while ($row = mysql_fetch_row($result)) {
foreach($year_values as $vals) {
$w = $row[2];
$e = $row[0];
$r = $row[1];
$tt = $row[3];
$eo = sqrt(2 * $vals[5] * $r / ($e * $w));
$eoq = round($eo, 1);
$ro = $vals[5] / 360;
$rop = round($ro * $tt);
$op = round($vals[5] / $eoq, 1);
$cc = round(89 / $op);
$h = round((($eoq * $e * $w) / 2), 2);
$o = round((($r * $vals[5]) / $eoq), 2);
$z = round($h + $o, 2);
}
}

Answer 3

mysql_fetch_row will return false once the rows have been fetched all. To reuse it you should store them in a variable (like the response made by Jari) or you could switch the two cycles (see imulsion's answer)