foreach problem

function get_works($status) {
    $CI = &get_instance();
    $query = "SELECT * FROM manager_works";

    if(!isset($status) || empty($status)) {
        $status = array('READY');
    }

    foreach ($status as $s) {
        $CI->db->or_where('state', $s);
    }

    $query = $CI->db->query($query);

    if ($query->num_rows() == 1) {
        return count($query->row());
    } else {
        return 0;
    }
}






// A PHP Error was encountered

// Severity: Warning

// Message: Invalid argument supplied for foreach()

//  Filename: helpers/rocks_helper.php

//  Line Number: 24

//  Backtrace:

//  File: /var/www/vhosts/intranet.**********/httpdocs/application/helpers/rocks_helper.php
//  Line: 24
//  Function: _error_handler

//  File: /var/www/vhosts/intranet.**********/httpdocs/application/controllers/Login.php
//  Line: 21
//  Function: get_works

//  File: /var/www/vhosts/intranet.**********/httpdocs/index.php
//  Line: 292
//  Function: require_once