Convert a multi-dimensional, associative array to CSV data

str_putcsv.php

<?php 
/**
 * Convert a multi-dimensional, associative array to CSV data
 * @param  array $data the array of data
 * @return string       CSV text
 */
function str_putcsv($data) {
        # Generate CSV data from array
        $fh = fopen('php://temp', 'rw'); # don't create a file, attempt
                                         # to use memory instead

        # write out the headers
        fputcsv($fh, array_keys(current($data)));

        # write out the data
        foreach ( $data as $row ) {
                fputcsv($fh, $row);
        }
        rewind($fh);
        $csv = stream_get_contents($fh);
        fclose($fh);

        return $csv;
}