我可以在PHP类上获取CONST的定义吗? [英] Can I get CONST's defined on a PHP class?

问题描述

我在某些类上定义了几个CONST，并希望获得它们的列表.例如:

I have several CONST's defined on some classes, and want to get a list of them. For example:

class Profile {
    const LABEL_FIRST_NAME = "First Name";
    const LABEL_LAST_NAME = "Last Name";
    const LABEL_COMPANY_NAME = "Company";
}

是否有任何方法可以获取在Profile类上定义的CONST的列表?据我所知，最接近的选项(get_defined_constants())不会解决问题.

Is there any way to get a list of the CONST's defined on the Profile class? As far as I can tell, the closest option(get_defined_constants()) won't do the trick.

我真正需要的是一个常量名称列表-像这样:

What I actually need is a list of the constant names - something like this:

array('LABEL_FIRST_NAME',
    'LABEL_LAST_NAME',
    'LABEL_COMPANY_NAME')

或者:

array('Profile::LABEL_FIRST_NAME', 
    'Profile::LABEL_LAST_NAME',
    'Profile::LABEL_COMPANY_NAME')

甚至:

array('Profile::LABEL_FIRST_NAME'=>'First Name', 
    'Profile::LABEL_LAST_NAME'=>'Last Name',
    'Profile::LABEL_COMPANY_NAME'=>'Company')

推荐答案

您可以使用反射.请注意，如果您经常这样做，则可能需要查看缓存结果.

You can use Reflection for this. Note that if you are doing this a lot you may want to looking at caching the result.

<?php
class Profile {
    const LABEL_FIRST_NAME = "First Name";
    const LABEL_LAST_NAME = "Last Name";
    const LABEL_COMPANY_NAME = "Company";
}


$refl = new ReflectionClass('Profile');
print_r($refl->getConstants());

输出:

Array
(
    'LABEL_FIRST_NAME' => 'First Name',
    'LABEL_LAST_NAME' => 'Last Name',
    'LABEL_COMPANY_NAME' => 'Company'
)

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