How can PHP be used to extract and process data from a multipart/form-data request containing a .csv file?

To extract and process data from a multipart/form-data request containing a .csv file in PHP, you can use the $_FILES superglobal to access the uploaded file and then use functions like fopen, fgetcsv, and fclose to read and process the CSV data. 

if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_FILES['csv_file']['name'])) {
    $file = $_FILES['csv_file']['tmp_name'];
    
    if (($handle = fopen($file, 'r')) !== false) {
        while (($data = fgetcsv($handle, 1000, ',')) !== false) {
            // Process the CSV data here
            print_r($data);
        }
        fclose($handle);
    }
}

Keywords

PHP multipart/form-data file upload CSV data processing

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