php 二维数组 按参数条件过滤

        $cond = array(
               'p'=>$p,
               'b'=>$b,
               'g'=>$g,
               'stock'=>$stock,
               'keyword'=>$keyword,
        );
        $reagentProds = Common::getReagentProds($cas);
        $reagentProds = $this->tag_filter($reagentProds, $cond);
      /**
          * 按条件筛选
          * @param $v
          * @param $cond
          * @return mixed
          */
         public function tag_filter($v, $cond){
              $v =  array_filter($v, function($elem) use($cond){
                 if($cond['p']){
                   return $elem['purity'] == $cond['p'];
                 }else{
                      return true;
                 }
              });
              $v =  array_filter($v, function($elem) use($cond){
                   if($cond['b']){
                        return $elem['reagent_name'] == $cond['b'];
                   }else{
                        return true;
                   }
              });
              $v =  array_filter($v, function($elem) use($cond){
                   if($cond['g']){
                        return $elem['pack'] == $cond['g'];
                   }else{
                        return true;
                   }
              });
              $v =  array_filter($v, function($elem) use($cond){
                   if($cond['stock'] == 1){
                        return $elem['stock'] >0;
                   }else{
                        return true;
                   }
              });
              return array_filter($v, function($elem) use($cond){
                   if($cond['keyword']){
                        return strpos($elem['packsize'].$elem['packunit'], $cond['keyword'])!==false || strpos($elem['purity'], $cond['keyword'])!==false;
                   }else{
                        return true;
                   }
              });
         }