php教程

ReflectionParameter::isDefaultValueConstant

(PHP 5 >= 5.4.6, PHP 7)

ReflectionParameter::isDefaultValueConstantReturns whether the default value of this parameter is a constant

说明

public ReflectionParameter::isDefaultValueConstant ( void ) : bool

Returns whether the default value of this parameter is a constant.

参数

此函数没有参数。

返回值

Returns TRUE if the default value is constant, and FALSE otherwise.

参见

User Contributed Notes

kristianoye at gmail dot com 25-May-2015 09:39
This method returns true only if the parameter's default value is set to a named constant.  e.g.

class Foo {
   const OPTION_MULTIGET = 1;

   //Method 1
   public function setGetOptions($opts=0);

   //Method 2
   public function setMultiGetOptions($opts=Foo::OPTION_MULTIGET);
}

Method 1's first ReflectionParameter will return isDefaultValueConstant() = false (0 is a "constant"/static value but not a named constant) and Method 2's will return isDefaultValueConsntant() = true.

CopyRight © 2008-2022 verySource.Com All Rights reserved. 京ICP备17048824号-1 京公网安备:11010502034788