页面查询某一个时间段的数据的方法或者查询多个条件的数据库的查询方法

1.只查询在某一个时间段的数据

$param = $this->request->post();
$b=array();
if(!empty($param['start_time']) && !empty($param['end_time'])){
    $b['create_time']=array('between',strtotime($param['start_time']).','.strtotime($param['end_time']));
}
$StyleTypeModel = new StyleTypeModel();
$result = Db::name('style_type')
        ->where($b)
        ->select();

2.查询多个条件的数据

$param = $this->request->post();
$a=array();
$b=array();
$c=array();
if(!empty($param['category'])){
    $a['type']=$param['category'];
}
if(!empty($param['start_time']) && !empty($param['end_time'])){
    $b['create_time']=array('between',strtotime($param['start_time']).','.strtotime($param['end_time']));
}
if(!empty($param['keyword'])){
    $c['name']=$param['keyword'];
}
$d=$a+$b+$c;
$StyleTypeModel = new StyleTypeModel();
$result = Db::name('style_type')
        ->where($d)
        ->select();