數組去空以及從新排序

<span style="white-space:pre">	</span>foreach((array) $mzlist as $k=>$v){
            if( !$v ){
                unset( $mzlist[$k] );
            }else{
                foreach((array) $v as $key=>$val){
                    $free[] = $val;
                }
            }
        }