PHP str_putcsv function

gistfile1.aw

<?php
/* From: http://www.php.net/manual/en/function.str-getcsv.php#88773 and http://www.php.net/manual/en/function.str-getcsv.php#91170 */
if(!function_exists('str_putcsv'))
{
    function str_putcsv($input, $delimiter = ',', $enclosure = '"')
    {
        // Open a memory "file" for read/write...
        $fp = fopen('php://temp', 'r+');
        // ... write the $input array to the "file" using fputcsv()...
        fputcsv($fp, $input, $delimiter, $enclosure);
        // ... rewind the "file" so we can read what we just wrote...
        rewind($fp);
        // ... read the entire line into a variable...
        $data = fread($fp, 1048576);
        // ... close the "file"...
        fclose($fp);
        // ... and return the $data to the caller, with the trailing newline from fgets() removed.
        return rtrim($data, "\n");
    }
}

Why was it tweaked from the original version, which had $data = fgets($fp);? And does anyone know why the original version got -1 points while it seems to work well?

Why was it tweaked

I used the original and it is buggy. By using fgets it reads only one line from the stream. However csv supports linebreaks in cells.