limosek-zaf-plugins/csv/get_fields.php

#!/usr/bin/php
<?php
require_once(__DIR__ . "/functions.inc.php");

$csv = getenv("csv");
$range = parse_colnum(getenv("columns"));
$rangef = array_flip($range);
$delim = getenv("delimiter");

$c = fopen($csv, "r");
$header = fgetcsv($c, false, $delim);
fclose($c);

json_init();

$last1 = end($header);
$last2 = end($range);

foreach ($header as $num => $column) {
    if (!array_key_exists($num, $range))
        continue;
    json_row();
    json_column("COLUMN", $num+1);
    json_column("NAME", addslashes($column), true);
    json_row_end($last1 == $column || $last2 == ($num + 1));
}

json_end();