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Home Backend Development PHP Tutorial php foreach 循环数组 并设定key

php foreach 循环数组 并设定key

Jun 23, 2016 pm 02:13 PM

foreach($role as $k=>$v){	$arrayRole[$k=$v->role_id]=$v->role_code;					} 
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如题 我写的 key 总是设置不了


回复讨论(解决方案)

怎么设置不了,print_r($role); 看看

foreach($role as $k=>$v){
$arrayRole[$v->role_id]=$v->role_code;

}

foreach($role as $k=>$v){
$arrayRole[$v->role_id]=$v->role_code;

}

foreach($role as $k=>$v){
$arrayRole[$k][$v->role_id]=$v->role_code;

}

$k=$v->role_id
Copy after login

这个能当键吗

输出 的是 [user_roles] => Array ( [0] => 1 [1] => 3 ) 前边的 键值 还是 0 1

那当然不对了。第二维必须是一个对象。且有 role_id,role_code 属性才行。

.....不是 我的是 一维数组 前边的是yii 的格式

仔细说明下吧 我做 的只是向 [user_roles] 放一个数组 数组


foreach($role as $k=>$v){
$arrayRole[$k=$v->role_id]=$v->role_code;

}

我这样写的数组 放进去 以后发现 数组的 key 没有被设置成功

print_r($role);
贴出结果

Array ( [user_name] => sss [user_password] => 123 [user_roles] => Array ( [0] => 1 [1] => 3 ) [user_sex] => 男 [user_birthday] => 1992-12-23 [user_relation] => 18716439681 [dep_id] => dep_cn [user_address] => xxxxxx [user_allowed] => [user_createtime] => 0 [user_lasttime] => 0 [user_realname] => demo [user_id] => )


我说的 红色区域

1、你的这个是数组,不是对象。不能用对象方式访问
2、你的 foreach( $role as $k=>$v){ 中的 是指那套红的部分吗?显然不是
按我的要求,应该是整个数据

foreach($role as $k=>$v){
if($k == 'user_roles') { .... }
}

你最好在描述一下,你打算加工成什么样的形式

foreach($role as $k=>$v){ 是 红色部分的

<?php			foreach($role as $k=>$v){			  $arrayRole[$v->role_id]=$v->role_code;													} 			?>		<?php echo $form->labelEx($model,'user_roles'); ?>		<?php echo $form->checkBoxList($model,'user_roles',$arrayRole); ?>		<?php echo $form->error($model,'user_roles'); ?>
Copy after login
Copy after login
Copy after login


这是 红色部分 的 代码
我只是向 [user_roles] => Array ( [0] => 1 [1] => 3 ) 有下划线的地方 上边代买生成的 我只是想问 为什么 我的数组 key 值设置不成功 怎么扯到这里来了

不说其他的,你本身那么写会有问题。
foreach里面定义了$k
然后新数组又有$k=$v->role_id;这个时候foreach的$k都变了。

你想要的数组是什么样的?

foreach($role as $k=>$v){ 是 红色部分的

<?php			foreach($role as $k=>$v){			  $arrayRole[$v->role_id]=$v->role_code;													} 			?>		<?php echo $form->labelEx($model,'user_roles'); ?>		<?php echo $form->checkBoxList($model,'user_roles',$arrayRole); ?>		<?php echo $form->error($model,'user_roles'); ?>
Copy after login
Copy after login
Copy after login


这是 红色部分 的 代码
我只是向 [user_roles] => Array ( [0] => 1 [1] => 3 ) 有下划线的地方 上边代买生成的 我只是想问 为什么 我的数组 key 值设置不成功 怎么扯到这里来了
检查$v是否有role_id属性

           foreach($role as $k=>$v){			 $arrayRole[$v->role_id]=$v->role_code;									} 
Copy after login


我想问的是 我的 这段 代码有没有问题 还有 foreach 循环 赋值并设置键值 还有没有其他方法 以及你有能力有爱心的 话 告诉我下 我的方法哪里出错了 。 看完这些的 小生在此拜谢了。

我想要的数组 key 放 role的 id value 放 role的编码


foreach($role as $k=>$v){ 是 红色部分的

<?php			foreach($role as $k=>$v){			  $arrayRole[$v->role_id]=$v->role_code;													} 			?>		<?php echo $form->labelEx($model,'user_roles'); ?>		<?php echo $form->checkBoxList($model,'user_roles',$arrayRole); ?>		<?php echo $form->error($model,'user_roles'); ?>
Copy after login
Copy after login
Copy after login
 

   这是     红色部分  的  代码      
我只是向  [user_roles] =>  Array ( [0] => 1 [1] => 3 )   有下划线的地方 上边代买生成的  我只是想问  为什么  我的数组  key 值设置不成功     怎么扯到这里来了   
检查$v是否有role_id属性

role_id  有值      

单纯从这个foreach来看是没有问题的。

哦  我在研究研究 

foreach 是没问题的,关键是你的数组没有你说的 role_id 和 role_code 元素。

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