array
(
    [0] => array
        (
            [id] => 6
            [title] => 凤凰
            [bid] => 2
        )
    [1] => array
        (
            [id] => 5
            [title] => 年康
            [bid] => 2
        )
    [2] => array
        (
            [id] => 4
            [title] => 海鸥
            [bid] => 2
        )
    [3] => array
        (
            [id] => 3
            [title] => 111cn.net
            [bid] => 1
        )
    [4] => array
        (
            [id] => 2
            [title] => 中国web第一站
            [bid] => 1
        )
    [5] => array
        (
            [id] => 1
            [title] => www.111cn.net
            [bid] => 1
        )
)
//方法一,直接把值取出来，并且输出
foreach($arr as $key=>$val){
      foreach($val as $k=>$val2){
               if($val2['bid']==1){//判断
                     echo  $val2['bid'].
;
               }    
     }
}
//方法二，把符合条件的数组再次生成数组
 代码如下 复制代码
res=array(); 
foreach($arr as $sub){ 
    foreach($sub as $value){ 
         if($value==1){ 
             array_push($res,$sub); 
        } 
     } 
 }
print_r($res);
//结果为
array
(
        [3] => array
        (
            [id] => 3
            [title] => 111cn.net
            [bid] => 1
        )
    [4] => array
        (
            [id] => 2
            [title] => 中国web第一站
            [bid] => 1
        )
    [5] => array
        (
            [id] => 1
            [title] => www.111cn.net
            [bid] => 1
        )
)