public function school_list()
{
$where = array();
if ($area_id = intval($this->input->get('area_id'))) {
$where['area_id'] = $area_id;
}
if ($city_id = intval($this->input->get('city_id'))) {
$where['city_id'] = $city_id;
}
if ($school_property = intval($this->input->get('school_property'))) {
$where['school_property'] = $school_property;
}
if ($keyword = trim($this->input->get('keyword'))) {
$where['keyword'] = $keyword;
}
if ($grade_id = intval($this->input->get('grade_id'))) {
$grade_period = get_grade_period($grade_id);
if ($grade_period) {
$where['grade_period'] = $grade_period;
}
}
$schools = SchoolModel::search_school($where);
echo json_encode($schools);
}