Radio buttons PHP error

in_array() [function.in-array]: Wrong datatype for second argument in /home/USERNAME/public_html/home/core/cache/includes/elements/modsnippet/41.include.cache.php

[[!+fi.property:FormItIsChecked=`No particular property`]]

<?php
function elements_modsnippet_45($scriptProperties= array()) {
global $modx;
if (is_array($scriptProperties)) {
extract($scriptProperties, EXTR_SKIP);
}
/**
 * FormIt
 *
 * Copyright 2009-2012 by Shaun McCormick <[email protected]>
 *
 * FormIt is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) any
 * later version.
 *
 * FormIt is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * FormIt; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA 02111-1307 USA
 *
 * @package formit
 */
/**
 * Custom output filter that returns checked="checked" if the value is set
 *
 * @var string $input
 * @var string $options
 * @package formit
 */
$output = ' ';
if ($input == $options) {
    $output = ' checked="checked"';
}
$input = $modx->fromJSON($input);
if (in_array($options,$input)) {
  $output = ' checked="checked"';
}
return $output;
}

public function fromJSON($src, $asArray= true) {
        $decoded= '';
        if ($src) {
            if (!function_exists('json_decode')) {
                if (@ include_once (XPDO_CORE_PATH . 'json/JSON.php')) {
                    if ($asArray) {
                        $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
                    } else {
                    $json = new Services_JSON();
                    }
                    $decoded= $json->decode($src);
                    }
            } else {
                $decoded= json_decode($src, $asArray);
            }
        }
        return $decoded;
    }

function json_decode ($json, $assoc = false, $depth = 512, $options = 0) {}