如何动态检查PHP中函数的参数数量 [英] how to dynamically check number of arguments of a function in php

问题描述

如何在运行时首页检查PHP中方法或函数具有的许多参数.

how can I check at runtime home many parameters a method or a function have in PHP.

示例

class foo {
   function bar ( arg1, arg2 ){
    .....
   }
}

我将需要知道是否可以运行类似的东西

I will need to know if there is a way to run something like

get_func_arg_number ( "foo", "bar" )

结果为

2

推荐答案

您需要使用 reflection 进行做到这一点.

You need to use reflection to do that.

$method = new ReflectionMethod('foo', 'bar');
$num = $method->getNumberOfParameters();

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