How do i get this data in the proper format? - php

Question

ok so i have this query
select ss.system_step_id, ss.step_number, cd.name, ssp.system_step_product_id, p.cost, ssp.class_id from system_step ss
join system as s on s.system_id=ss.system_id
join category_description as cd on cd.category_id=ss.sub_category_id
join system_step_product as ssp on ss.system_step_id=ssp.system_step_id
join product as p on p.product_id=ssp.product_id where s.system_id = 41
order by ss.step_number, ssp.class_id;
which yields this result
7 1 Screens 808 115.0000 1
7 1 Screens 809 381.9000 2
7 1 Screens 810 441.9000 3
8 2 Printers 811 112.3200 1
8 2 Printers 812 201.0400 2
8 2 Printers 813 202.8700 3
9 3 Cash Drawers 814 135.7000 1
9 3 Cash Drawers 815 86.5400 2
9 3 Cash Drawers 816 135.7000 3
Is there a way to turn this into a php array of three elements like this
Array
(
[0] => Array
(
[name] => "Screens"
[standard_product] => Array ([id] => 808, [price] => '115.0000')
[business_product] => Array ([id] => 809, [price] => '381.9000')
[premium_product] => Array ([id] => 810, [price] => '441.9000')
)
[1] => Array
(
[name] => "Printers"
[standard_product] => Array ([id] => 811, [price] => '112.3200')
[business_product] => Array ([id] => 812, [price] => '201.0400')
[premium_product] => Array ([id] => 813, [price] => '202.8700')
)
[2] => Array
(
[name] => "Cash Drawers"
[standard_product] => Array ([id] => 814, [price] => '135.7000')
[business_product] => Array ([id] => 815, [price] => '86.5400')
[premium_product] => Array ([id] => 816, [price] => '135.7000')
)
)
$sql = "select ss.system_step_id, ss.step_number, cd.name, ssp.system_step_product_id, p.cost, ssp.class_id, pd.name as product_name, pd.description from system_step ss join system as s on s.system_id=ss.system_id join category_description as cd on cd.category_id=ss.sub_category_id join system_step_product as ssp on ss.system_step_id=ssp.system_step_id join product as p on p.product_id=ssp.product_id join product_description as pd on pd.product_id=p.product_id where s.system_id = {$system['system_id']} order by ss.step_number, ssp.class_id;";
$result = mysql_query($sql);
$steps = array();
while($row_r = mysql_fetch_assoc($result)){
$steps[] = $row_r;
}
so steps is the the full array with 9 elements
As you can see the only thing of note is the class_id 1 is standard_product class_id 2 is business_product and class_id 3 is premium_product

Answer 1

You can fetch fill a multi-dimensional array while fetching the SQL result or split into several SQL commands and therefore build up your array (1st fetching the names, than the products with values of every name).
I do not know which you prefer but as you have a large join splitting the SQL might not be the worst in terms of readability of your code. Performance impact may vary.

Answer 2

Methinks this will do it
<?php
$finalArray = array();
$nameArray = array('Screens', 'Printers', 'Cash Drawers');
foreach ($nameArray as $name) {
while ($row = mysql_fetch_assoc($result)) {
if ($row['name'] == $name) {
if ($row['class_id'] == 1) {
$standard = array('id' => $row['system_step_product_id'], 'price' => $row['cost']);
}
else if ($row['class_id'] == 2) {
$business = array('id' => $row['system_step_product_id'], 'price' => $row['cost']);
}
else if ($row['class_id'] == 3) {
$premium = array('id' => $row['system_step_product_id'], 'price' => $row['cost']);
}
}
}
array_push($finalArray, array('name' => $name, 'standard_product' => $standard, 'business_product' => $business, 'premium_product' => $premium,));
}
?>
Hopefully I got all the column names right.
This is what I tested it off of and I get the correct output http://codepad.org/yjU3gxbB
The only thing you may what to change is creating the name array dynamically
while ($row = mysql_fetch_assoc($result)) {
array_push($nameArray, $row['name']);
}
$nameArray = array_unique($nameArray);
However, PHP doesn't like it when you do a mysql_fetch_assoc twice on the same query. You might want to do another query where you only select the cd.name