Question

Array
(
[0] => Array
    (
        [EndpointArn] => arn:aws:sns
        [Attributes] => Array
            (
                [Enabled] => true
                [Token] => APA91
                [CustomUserData] => Alcatel
            )

    )

[1] => Array
    (
        [EndpointArn] => arn:aws:sns:ap
        [Attributes] => Array
            (
                [Enabled] => true
                [Token] => APA91bGC
                [CustomUserData] => Oppo
            )

    )

)

我从源代码获取此数组。我是yalinqo的新手，所以在尝试和错误后，我碰巧用这段代码打印CustomUserData：

$result= from($Model2['Endpoints'][0]['Attributes'])->select(function($np) { return $np; });

print $result->toArrayDeep()['CustomUserData'];

现在我想根据我选择的CustomUserData打印EndpointArn，但我的代码不起作用。

这是代码：

print 
from($Model2['Endpoints'])
->select(function($np){ return $np['EndpointArn']; })
->where(function($np){return $np['Attributes']['CustomUserData'] == 'Oppo';})
->toArrayDeep()
;

错误讯息：

Warning: Illegal string offset 'Attributes' in /home/u
Warning: Illegal string offset 'CustomUserData' in /home/u  
Warning: Illegal string offset 'Attributes' in /home/u    
Warning: Illegal string offset 'CustomUserData' in /home/u

此代码：

print 
from($Model2['Endpoints'])
->select(function($np){ return $np['EndpointArn']; })
->where(function($np){return $np['Attributes']['CustomUserData'] == 'Oppo';})
;

错误讯息：

Catchable fatal error: Object of class YaLinqo\Enumerable could not be converted to string in

有人可以遮挡一些光吗？

感谢。

Answer 1

尝试和错误后，这是答案：

print 
from($Model2['Endpoints'])
->where(function($np){return $np['Attributes']['CustomUserData'] == 'Oppo';})
->select(function($np){ return $np['EndpointArn']; })
->toString()
;

结果

arn:aws:sns:ap

YALINQO：查询深层数组

1 个答案: