ReflectionFunctionAbstract::getNumberOfParameters()

(PHP 5 >= 5.3.0, PHP 7)

获取参数数目

说明

publicReflectionFunctionAbstract::getNumberOfParameters(void) : int

获取函数定义的参数数目，包括可选参数

Warning

本函数还未编写文档，仅有参数列表。

参数

此函数没有参数。

返回值

参数的个数

参见

• ReflectionFunctionAbstract::getNumberOfRequiredParameters() 获取必须输入参数个数
• func_num_args()Returns the number of arguments passed to the function

Working on a new MVC Application Framework i use this method to check how many arguments are required before calling the sub method!
Example 
<?php
    $this->method_args_count = $this->CReflection
      ->getMethod($Route->getMethod())
      ->getNumberOfParameters();
    //Maybe be 5 but if uri is /controller/method/single_param/ we only of 1
    $this->params = $Route->getParams(); //0 in some cases
    if($this->method_args_count > count($this->params))
    {
      $this->difference = ($this->method_args_count - count($this->params));
      for($i=0;$i<=$this->difference;$i++)
      {
        $this->params[] = false;
      }
    }
    
    //Call the method with correct amount of params
    // but as false for params that have not been passed!
    call_user_func_array(array(new $this->obj,$Route->getMethod()),$this->params);
?>