php三維數組變二維數組

<?php
    $result = Array(0 => Array(0 => Array(bid => 41,brealname => 'we教官',cid => 41,crealname => 'we教官')),
                    1 => Array(0 => Array(bid => 6,brealname => '虎子',cid => 19,crealname => '張魚'))
    );

    //原數組
    print_r($result);
    echo "<br />";

    //第一種方法：
    foreach ($result as $key =>$v){
        $new_arr[]=$v[0];
    }
    echo '<pre>';
    print_r($new_arr);

    //第二種方法
    //初始化$arr2  
    $arr2=array();  
           
    //循環遍歷三維數組$arr3  
    foreach($result as $value){  
        foreach($value as $v){  
             $arr2[]=$v;  
        }  
    }
    
    //銷毀$arr3 
    unset($result,$value,$v);
    echo "<br /s>";
    echo "第二種方法：";
    echo '<pre>';
    print_r($arr2);
?>