how can i use condition checks in php using mysql PDO statements? - php

Question

i am trying to simplify my code which has multiple checks.. following is my code -
$query2 = "SELECT * FROM sample.temp";
$rslt = $dbo->query($query2);
if($rslt->rowCount() > 0)
{
foreach($rslt as $item)
{
$id = $item['entry_id'];
$Qty = $item['Qty'];
$group_ID = $item['group_ID'];
$component = $item['component'];
$vendor_ID = $item['vendor_ID'];
$stmt = $dbo->prepare("SELECT Qty FROM sample.temp WHERE vendor_ID=$vendor_ID AND component='$component' LIMIT 1");
if ($stmt->execute(array($_GET['Qty'])))
{
while ($row = $stmt->fetch(PDO::FETCH_OBJ))
{
$Q = $row->Qty;
}
}
$query4 = "UPDATE sample.stock SET Qty=(Qty+$Q) WHERE stock_ID=$vendor_ID AND component='$component'";//updating single existing entries
if ($dbo->query($query4))
{echo "Production updated !";}
else {echo "Production not updated!";}
$stm = $dbo->prepare("SELECT Qty FROM sample.temp WHERE vendor_ID=$vendor_ID AND component!='$component' LIMIT 1");
if ($stm->execute(array($_GET['Qty'])))
{
while ($row = $stm->fetch(PDO::FETCH_OBJ))
{
$Qt = $row->Qty;
}
$query5 = "INSERT INTO sample.stock (stock_ID, component, Qty) VALUES ($vendor_ID, '$component', $Qt)";//inserting new entry
if ($dbo->query($query5))
{echo "Production updated !";}
else {echo "Production not updated!";}
$st = $dbo->prepare("SELECT Qty FROM sample.temp WHERE vendor_ID!=$vendor_ID AND component='$component' LIMIT 1");
if ($st->execute(array($_GET['Qty'])))
{
while ($row = $st->fetch(PDO::FETCH_OBJ))
{
$Qtt = $row->Qty;
}
$query6 = "INSERT INTO sample.stock (stock_ID, component, Qty) VALUES ($vendor_ID, '$component', $Qtt)";//inserting new entry
if ($dbo->query($query6))
{echo "Production updated !";}
else {echo "Production not updated!";}
}
}
is there any way i can possibly reduce this code or change the way conditions are checked?
If i could use if statements in all three select statements it would be great !
Firstly i select a temporary table from where i transfer data into stock table on the basis of 3 checks -
updating existing values in stock table if they have same stock_ID and component as it is in temporary table
inserting new entry in stock table if it is not having the component corresponding to that stock_ID
inserting new entry in stock table if it is having the component but does not corresponds to any stock_ID in stock table
Note- vendor_ID in temporary table is same as stock_ID in stock table.