PHP：直接访问对象数组中的元素

问题描述：

I am trying to output a set of data, and I have, due to my LEFT OUTER JOIN got multiple rows per match.

I'm using a positive look ahead to see if the next row is the same id as the first. However the return from the database class returns an array of objects.

array(7) {
          [0]=> object(stdClass)#4 (8) {
                                      ["dom_id"]=>string(1) "3"
                                      ["domain"]=>string(11) "example.com"
                                      ["status"]=>string(7) "Invalid"
                                      ["expiry"]=>string(10) "2010-07-20"
                                      ["remaining"]=>string(6) "0 Days"
                                      ["rem_id"]=>NULL
                                      ["alert_type"]=>NULL
                                      ["contact"]=>NULL
  }
//etc

I am getting the following error, Fatal error: Cannot use object of type stdClass as array

My code is as follows,

echo $domains[$k+1]->alert_type;

I know that I could assign the new dimension to a variable and access that as an object, but for the sake of neatness I'd rather access it directly.

Is this possible? ..and if it is, how do I approach it?

我正在尝试输出一组数据，由于我的LEFT OUTER JOIN 每次匹配得到多行。 p>

我正在使用正向前看，看看下一行是否与第一行的id相同。但是，从数据库类返回会返回一个对象数组。 p>


  array（7）{
 [0] =＆gt;  object（stdClass）＃4（8）{
 [“dom_id”] =＆gt; string（1）“3”
 [“domain”] =＆gt; string（11）“example.com”
 [“  status“] =＆gt; string（7）”Invalid“
 [”expiry“] =＆gt; string（10）”2010-07-20“
 [”remaining“] =＆gt; string（6）”0 天“
 [”rem_id“] =＆gt; NULL 
 [”alert_type“] =＆gt; NULL 
 [”contact“] =＆gt; NULL 
} 
 //等等
  code>  
 
 我收到以下错误，致命错误：无法使用stdClass类型的对象作为数组 code>  p> 
 
 
我的代码是 如下： p> 
 
 

  echo $ domains [$ k + 1]  - ＆gt; alert_type; 
  code>  pre> 
 
 我知道 我可以将新维度分配给变量并将其作为对象访问，但为了整洁，我宁愿直接访问它。 p> 
 
 
这是否可能 竹叶提取？  ..如果是，我该如何处理？ p> 
 
 
 Ta  p> 
  div>

答

Either

fetch as array instead of stdClass or
typecast to (array) or
use a custom class that implements ArrayAccess.

答

Assuming that $domains is your stdClass object which you wish was an array, you could try using variable variables:

echo $domains->{$k+1}->alert_type;

The real problem though is that you have a bunch of stdClass objects. Are you storing these in a session and then reading them later, or are you neglecting to include a file or something... ?

PHP：直接访问对象数组中的元素

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