如何访问数组的对象(stdClass 对象)成员/元素的属性? [英] How to access a property of an object (stdClass Object) member/element of an array?

问题描述

在我的数组上执行 print_r() 我得到以下结果:

Doing print_r() on my array I get the following:

Array ( 
    [0] => 
        stdClass Object 
        ( 
            [id] => 25 
            [time] => 2014-01-16 16:35:17 
            [fname] => 4 
            [text] => 5 
            [url] => 6 
        ) 
)

如何访问数组中的特定值?由于 stdClass 对象，以下代码不起作用

How can I access a specific value in the array? The following code does not work because of the stdClass Object

echo $array['id'];

推荐答案

要访问数组成员，请使用 $array['KEY'];

To access an array member you use $array['KEY'];

要访问对象成员，请使用 $obj->KEY;

To access an object member you use $obj->KEY;

要访问对象数组中的对象成员:
$array[0]//获取数组中的第一个对象
$array[0]->KEY//然后访问它的密钥

To access an object member inside an array of objects:
$array[0] // Get the first object in the array
$array[0]->KEY // then access its key

你也可以像这样循环遍历一个对象数组:

You may also loop over an array of objects like so:

foreach ($arrayOfObjs as $key => $object) {
    echo $object->object_property;
}

将数组视为事物的集合.这是一个袋子，您可以在其中存储您的东西并给它们一个唯一的 ID(密钥)并使用该密钥访问它们(或从袋子中取出东西).我想在这里保持简单，但这个包也可以装其他包:)

Think of an array as a collection of things. It's a bag where you can store your stuff and give them a unique id (key) and access them (or take the stuff out of the bag) using that key. I want to keep things simple here, but this bag can contain other bags too :)

一个数组包含 'key' 和 'value' 对.为数组成员提供键是可选的，在这种情况下，它会自动分配一个数字键，该键从 0 开始，并为每个附加成员继续增加 1.我们可以通过它的key"从数组中检索一个值".

An array contains 'key' and 'value' pairs. Providing a key for an array member is optional and in this case it is automatically assigned a numeric key which starts with 0 and keeps on incrementing by 1 for each additional member. We can retrieve a 'value' from the array by it's 'key'.

所以我们可以通过以下方式定义一个数组(关于键):

So we can define an array in the following ways (with respect to keys):

$colorPallete = ['red', 'blue', 'green'];

上述数组将自动分配数字键.因此分配给红色的键将为 0，蓝色为 1，依此类推.

The above array will be assigned numeric keys automatically. So the key assigned to red will be 0, for blue 1 and so on.

$colorPallete[0]; // will output 'red'
$colorPallete[1]; // will output 'blue'
$colorPallete[2]; // will output 'green'

第二种方法:

$colorPallete = ['love' => 'red', 'trust' => 'blue', 'envy' => 'green']; // we expliicitely define the keys ourself.

从上述数组中获取值:

$colorPallete['love']; // will output 'red'
$colorPallete['trust']; // will output 'blue'
$colorPallete['envy']; // will output 'green'

这篇关于如何访问数组的对象(stdClass 对象)成员/元素的属性?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！