PHP function: csv_to_JSON($input, $delimiter, $request)

gistfile1.php

<?php
  function csv_to_JSON($input, $delimiter, $request){
    $header = null;
    $data = array();
    $csvData = str_getcsv($input, "\n");
    foreach($csvData as $csvLine){ 
      if(is_null($header)) $header = explode($att_delimiter, $csvLine);
      else{
        $items = explode($att_delimiter, $csvLine);
        for($n = 0, $m = count($header); $n < $m; $n++){
          $items[$n] = trim($items[$n]);
          $prepareData[$header[$n]] = $items[$n];
        }
        $data[] = $prepareData;
      }
    }
    $JSONdata = json_encode($data, JSON_NUMERIC_CHECK);
    if($request=="[no explanation]JSON[/no explanation]" ) return $JSONdata;
    elseif($request=="keys") return $header;
    else return null;
  }
?>