Just discovered this and I am mighty impressed. It seems that in PHP 5.1 and higher there are the functions fgetcsv() and fputcsv(). They make it pretty simple to read and write a csv file.
Here is a simple example which reads a csv file, adds a couple of fields and writes it to a new file.
<?php // Open the output csv file $outputfp = fopen('output.csv', 'w'); // Read from the input csv file if (($inputfp = fopen("input.csv", "r")) !== FALSE) { while (($data = fgetcsv($inputfp, 1000, ",")) !== FALSE) { // Declare an array which will be used to hoe the new csv line $line=array(); // Add the data from the read csv file to the output array $line[]=$data[0]; $line[]=$data[1]; // Add some more data, just because we can $line[]="another param"; $line[]="yet another extra param"; // Write the line to the file fputcsv($outputfp, $line); } // Clean up fclose($inputfp); fclose($outputfp); } ?>