Convert csv in php and get unique value - php

Question

I would like to convert a csv file that has duplicate contents and i would like to sum the quantity and extract the price without sum it.
file.csv :
code,qty,price
001,2,199
001,1,199
002,2,159
002,2,159
Actual php that sum the quantiy and get a result with unique value and total qty.
<?php
$tsvFile = new SplFileObject('file.csv');
$tsvFile->setFlags(SplFileObject::READ_CSV);
$tsvFile->setCsvControl("\t");
$file = fopen('file.csv', 'w');
$header = array('sku', 'qty');
fputcsv($file, $header, ',', '"');
foreach ($tsvFile as $line => $row) {
if ($line > 0) {
if (isset($newData[$row[0]])) {
$newData[$row[0]]+= $row[1];
} else {
$newData[$row[0]] = $row[1];
}
}
}
foreach ($newData as $key => $value) {
fputcsv($file, array($key, $value), ',', '"');
}
fclose($file);
?>
the result for this is:
code,qty
001,3
002,4
and i would like to add price, but without sum it.
The result i need is:
code,qty,price
001,3,199
002,4,159

Answer 1

I haven't tested this yet, but I think this is what you are looking for:
<?php
$tsvFile = new SplFileObject('file.csv');
$tsvFile->setFlags(SplFileObject::READ_CSV);
$tsvFile->setCsvControl("\t");
$file = fopen('file.csv', 'w');
$header = array('sku', 'qty');
fputcsv($file, $header, ',', '"');
foreach ($tsvFile as $line => $row) {
if ($line > 0) {
if(!isset($newData[$row[0]])) {
$newData[$row[0]] = array('qty'=>0, 'price'=>$row[2]);
}
$newData[$row[0]]['qty'] += $row[1];
}
}
foreach ($newData as $key => $arr) {
fputcsv($file, array($key, $arr['qty'], $arr['price']), ',', '"');
}
fclose($file);
?>

Answer 2

To start with, there's a nice function on the PHP page str_getcsv which will help you end up with a more legible array to work with:
function csv_to_array($filename='', $delimiter=',') {
if(!file_exists($filename) || !is_readable($filename))
return FALSE;
$header = NULL;
$data = array();
if (($handle = fopen($filename, 'r')) !== FALSE) {
while (($row = fgetcsv($handle, 1000, $delimiter)) !== FALSE) {
if(!$header)
$header = $row;
else
$data[] = array_combine($header, $row);
}
fclose($handle);
}
return $data;
}
This is purely for legibility sake but now comes the code which would allow you to work over the array.
$aryInput = csv_to_array('file.csv', ',');
$aryTemp = array();
foreach($aryInput as $aryRow) {
if(isset($aryTemp[$aryRow['code'])) {
$aryTemp[$aryRow['code']['qty'] += $aryRow['qty'];
} else {
$aryTemp[$aryRow['code']] = $aryRow;
}
}
In the above code, it simply:
Loops through the input
Checks whether the key exists in a temporary array
If it does, it just adds the new quantity
If it doesn't, it adds the entire row
Now you can write out your expectant csv file :)