【www.gdgbn.com--php常用代码】

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

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
        )
)

本文来源：http://www.gdgbn.com/jiaocheng/24734/