问题描述
我有一个从 json_decode 创建的 stdClass 对象，当我运行 count($obj) 函数时它不会返回正确的数字.该对象有 30 个属性，但 count() 函数的返回值是 1.
I have a stdClass object created from json_decode that won't return the right number when I run the count($obj) function. The object has 30 properties, but the return on the count() function is say 1.
有什么想法吗?
以下是其中一个对象的示例.(我从 Twitter 请求每日趋势信息).如果此对象具有多个属性，则 count($obj) 将等于 1.
Below is an example of one of the objects. (I'm requesting the daily trend information from Twitter). If this object had more than one property, the count($obj) would equal 1.
[trends] => stdClass Object
(
[2009-08-21 11:05] => Array
(
[0] => stdClass Object
(
[query] => "Follow Friday"
[name] => Follow Friday
)
[1] => stdClass Object
(
[query] => "Inglourious Basterds" OR "Inglorious Basterds"
[name] => Inglourious Basterds
)
[2] => stdClass Object
(
[query] => Inglourious
[name] => Inglourious
)
[3] => stdClass Object
(
[query] => #songsincode
[name] => #songsincode
)
[4] => stdClass Object
(
[query] => #shoutout
[name] => #shoutout
)
[5] => stdClass Object
(
[query] => "District 9"
[name] => District 9
)
[6] => stdClass Object
(
[query] => #howmanypeople
[name] => #howmanypeople
)
[7] => stdClass Object
(
[query] => Ashes OR #ashes
[name] => Ashes
)
[8] => stdClass Object
(
[query] => #youtubefail
[name] => #youtubefail
)
[9] => stdClass Object
(
[query] => TGIF
[name] => TGIF
)
[10] => stdClass Object
(
[query] => #wish09
[name] => #wish09
)
[11] => stdClass Object
(
[query] => #watch
[name] => #watch
)
[12] => stdClass Object
(
[query] => Avatar
[name] => Avatar
)
[13] => stdClass Object
(
[query] => Ramadhan
[name] => Ramadhan
)
[14] => stdClass Object
(
[query] => Goodnight
[name] => Goodnight
)
[15] => stdClass Object
(
[query] => iPhone
[name] => iPhone
)
[16] => stdClass Object
(
[query] => #iranelection
[name] => #iranelection
)
[17] => stdClass Object
(
[query] => Apple
[name] => Apple
)
[18] => stdClass Object
(
[query] => "Usain Bolt"
[name] => Usain Bolt
)
[19] => stdClass Object
(
[query] => H1N1
[name] => H1N1
)
)
)
推荐答案
问题是 count 的目的是计算数组中的索引，而不是对象上的属性，(除非它是实现了 Countable 接口的自定义对象).尝试将对象(如下所示)转换为数组，看看是否有帮助.
The problem is that count is intended to count the indexes in an array, not the properties on an object, (unless it's a custom object that implements the Countable interface). Try casting the object, like below, as an array and seeing if that helps.
$total = count((array)$obj);
简单地将对象转换为数组并不总是有效，但作为一个简单的 stdClass 对象，它应该在这里完成工作.
Simply casting an object as an array won't always work but being a simple stdClass object it should get the job done here.
这篇关于PHP:计算一个 stdClass 对象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跟版网！