PHP: Merge 2 columns in all CSV file rows

Question

Successful code will

open the csv file
merge the contents of 2 fields
put those merged values into another existing field
create new csv file with merged fields

Example starting CSV file:

product_name,producttype,size,category,sub_category

Lite 1/2 keg,Beer,1/2 keg,,pilsner

Bud Light 1/2 keg,Beer,1/2 keg,,pilsner

Expected ending CSV file:

product_name,producttype,size,category,sub_category

Lite 1/2 keg,Beer,1/2 keg,Beer;1/2 keg;pilser,pilsner

Bud Light 1/2 keg,Beer,1/2 keg,Beer;1/2 keg;pilser,pilsner

stackoverflow.com/questions/36142899/… seems to be the closest think I could find here. — kightn
– kightn, Commented May 3, 2020 at 16:04
[link]stackoverflow.com/questions/28550794/… led to solution. — kightn
– kightn, Commented May 4, 2020 at 19:58

kightn · Accepted Answer · 2020-05-04 20:04:30Z

Here is the solution I found. Likely not the most elegant one.

<?php
//Brand_Name	Brand_Description	SKUNumber	UPC	product_type	CATEGORY	SUB-CATEGORY	BEER TYPE	BEER STYLE	PRODUCER	price_regular	Size	Web Active	Quantity_Available
$columns = ["Brand_Name","Brand_Description","SKUNumber","UPC","product_type","CATEGORY","SUB-CATEGORY","BEER TYPE","BEER STYLE","PRODUCER","price_regular","Size","Web Active","Quantity_Available"];
//$columns = ["sku","category","description","image","small_image","thumbnail", "price","color"];

$file = fopen("Products_In.csv", "r"); //Open the old file for reading
$newFile = fopen("Products_Out.csv", "w"); //Create a new file for writing

while (($data = fgetcsv($file)) !== FALSE) {
    $row = array_combine($columns, $data);
    if(!empty($row['BEER TYPE'])){
	    $category = "{$row['product_type']};{$row['Size']};{$row['BEER TYPE']}";
    } else {  
	    $category = "{$row['product_type']};{$row['Size']}";
    }
	$row['SUB-CATEGORY'] = $category;
    fputcsv($newFile, array_values($row)); //write data into new file
}

fclose($file);
fclose($newFile);
echo "<h1>Categories updated</h1>";
?>

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