PHP:函数参数的名称 [英] PHP: function arguments' names

问题描述

我需要获取匿名函数参数的名称.

I need to get anonymous function arguments' names.

例如:

$func = function ( $param1, $param2 ) { ... };
$names = DO_SOMETHING($func); 
// after this $names should become something like array('param1', param2')

从理论上讲，可能是因为var_dump($func)说$func是Closure类的对象，并且具有parameter属性，即array('param1', 'param2').

Theoretically, it is possible because var_dump($func) says that $func is the object of Closure class and have parameter property which is array('param1', 'param2').

php.net上的官方文档没有介绍Closure类的任何方法，这对我有帮助.

Official documentation at php.net describes no methods of Closure class, which can help me.

我尝试直接访问此属性，但是PHP死于致命错误:Closure object cannot have properties.

I've tried to access this property directly, but PHP died with fatal error: Closure object cannot have properties.

我试图通过get_object_vars获取对象变量，但似乎parameter属性被确定为私有(无论如何，get_object_vars不会返回它).

I've tried to get object vars by get_object_vars but it seems the parameter property is declated as private (anyway, get_object_vars does not return it).

我唯一知道的一种方法是-截取var_dump的输出并解析它，但是正如我们容易理解的那样，这不是我们编写脚本的方式=)

The only one way I know -- to intercept the output of var_dump and parse it, but as we easily understand this is not the way we should write our scripts =)

对不起，我的英语不好.

Sorry for my bad english.

推荐答案

目前无法尝试，但请查看:

Can't try this at the moment, but have a look at:

http://www.php.net/manual/en/class.reflectionfunction.php

尤其是

http://www.php.net/manual/en/reflectionfunctionabstract.getparameters.php

也许这可以解决问题.

试试这个:

$func = function ( $param1, $param2 ) {
    /* some code */
};

$refFunc = new ReflectionFunction($func);
foreach ($refFunc->getParameters() as $refParameter) {
    echo $refParameter->getName(), '<br />';
}

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