get and put CSVs from a string instead of a file

StrCSV.php

<?php
class StrCSV
   public function strPutCsv($input, $delimiter = ',', $enclosure = '"')
    {
        // Open a memory "file" for read/write...
        $fp = fopen('php://memory', '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");
    }

    public function strGetCsv($input, $delimiter = ',', $enclosure = '"')
    {
        // Open a memory "file" for read/write...
        $fp = fopen('php://memory', 'r+');
        // ... write the $input string to the "file" using fputcsv()...
        fwrite($fp, $input);
        // ... rewind the "file" so we can read what we just wrote...
        rewind($fp);
        // ... read the entire line into an array variable...
        $data = fgetcsv($fp, 1048576, $delimiter, $enclosure);
        // ... close the "file"...
        fclose($fp);
        // ... and return the $data to the caller, with the trailing newline from fgets() removed.
        return $data;
    }
}