fputcsv - Combining multiple CSVs into one; empty enclosures "" only output with delimiter - php

Question

I'm coding a plugin that runs everyday at 5am. It combines multiple csv files (That have a txt extension).
Currently, it is working... HOWEVER, the output format is incorrect.
The input will look like this:
"","","","","email#gmail.com","PARK PLACE 109 AVE","SOME RANDOM DATA","","","",""
And so on. this is only a partial row.
The ouput of this code does not retun the same format. It produces something like this without the " in columns without data
,,,,email#gmail.com,"PARK PLACE 109 AVE","SOME RANDOM DATA",,,,
Here is the part of the function that combines everything:
function combine_and_email_csv_files() {
// Get the current time and date
$now = new DateTime();
$date_string = $now->format('Y-m-d_H-i-s');
// Get the specified directories
$source_directory = get_option('csv_file_combiner_source_directory');
$destination_directory = get_option('csv_file_combiner_destination_directory');
// Load the CSV files from the source directory
$csv_files = glob("$source_directory/*.txt");
// Create an empty array to store the combined CSV data
$combined_csv_data = array();
// Loop through the CSV files
foreach ($csv_files as $file) {
// Load the CSV data from the file
$csv_data = array_map('str_getcsv', file($file));
// Add the CSV data to the combined CSV data array
$combined_csv_data = array_merge($combined_csv_data, $csv_data);
}
// Create the combined CSV file
$combined_csv_file = fopen("$destination_directory/$date_string.txt", 'w');
// Write the combined CSV data to the file
foreach ($combined_csv_data as $line) {
fputcsv($combined_csv_file, $line);
}
// Close the combined CSV file
fclose($combined_csv_file);
}
No matter, what I've tried... it's not working. I'm missing something simple I know.

Answer 1

Thank you Nigel!
So this thread, Forcing fputcsv to Use Enclosure For *all* Fields helped me get there....
Using fputs instead of fputscsv and force "" on null values is the short answer for me. Works beautifully... code is below:
function combine_and_email_csv_files() {
// Get the current time and date
$now = new DateTime();
$date_string = $now->format('Y-m-d_H-i-s');
// Get the specified directories
$source_directory = get_option('csv_file_combiner_source_directory');
$destination_directory = get_option('csv_file_combiner_destination_directory');
// Load the CSV files from the source directory
$csv_files = glob("$source_directory/*.txt");
// Create an empty array to store the combined CSV data
$combined_csv_data = array();
// Loop through the CSV files
foreach ($csv_files as $file) {
// Load the CSV data from the file
$csv_data = array_map('str_getcsv', file($file));
// Add the CSV data to the combined CSV data array
$combined_csv_data = array_merge($combined_csv_data, $csv_data);
}
// Create the combined CSV file
$combined_csv_file = fopen("$destination_directory/$date_string.txt", 'w');
// Write the combined CSV data to the file
foreach ($combined_csv_data as $line) {
// Enclose each value in double quotes
$line = array_map(function($val) {
if (empty($val)) {
return "\"\"";
}
return "\"$val\"";
}, $line);
// Convert the line array to a CSV formatted string
$line_string = implode(',', $line) . "\n";
// Write the string to the file
fputs($combined_csv_file, $line_string);
}

Answer 2

Thank you Sammitch
After much haggling with this problem... Sammitch pointed out why not just concat the files... Simplicity is the ultimate sophistication... right?
*Note: this will only work for my specific circumstance. All I'm doing now is concating the files and checking each file ends with a new line and just plain skipping the csv manipulation.
Code below:
function combine_and_email_csv_files() {
// Get the current time and date
$now = new DateTime();
$date_string = $now->format('Y-m-d_H-i-s');
// Get the specified directories
$source_directory = get_option('csv_file_combiner_source_directory');
$destination_directory = get_option('csv_file_combiner_destination_directory');
// Load the files from the source directory
$files = glob("$source_directory/*.txt");
// Create the combined file
$combined_file = fopen("$destination_directory/$date_string.txt", 'w');
// Loop through the files
foreach ($files as $file) {
// Read the contents of the file
$contents = file_get_contents($file);
// Ensure that the file ends with a newline character
if (substr($contents, -1) != "\n") {
$contents .= "\n";
}
// Write the contents of the file to the combined file
fwrite($combined_file, $contents);
}
// Close the combined file
fclose($combined_file);