php function optional parameter

{Code...} is always mandatory Parameter definition in my image before the optional parameter definition. The above code shows the source code in lotusphp. How can I use this definition? public function addHost($groupId, $nodeId = "node_0", $role =

Public Function Addhost ($groupId, $nodeId = "Node_0", $role = "Master", $hostConfig) { //...} It's always been a must in my image. The parameter is defined before the optional parameter, the above code is seen in the lotusphp source, how to

1) optional parametric function. For example: Because $var3 and $VAR4 are given default values in defining functions, if they are not passed to them, they are the default values, and all are optional. 2) variable parameter function

First post: Optional parameters in PHP function prototypes Why do you write this? ， First, let's start. Write something simple. Just started to learn PHP, when looking at PHP manual encountered a problem: in the function prototype with optional

: This article mainly introduces the first blog post: Why is this option written in the PHP function prototype ?, If you are interested in the PHP Tutorial, refer. The first article is the beginning. Write something simple. When I first started

First post: Optional parameters in PHP function prototypes Why do you write this? First, let's start. Write something simple. Just started to learn PHP, when looking at PHP manual encountered a problem: in the function prototype with optional

First, let's start. Write something simple. Just started to learn PHP, when looking at PHP manual encountered a problem: in the function prototype with optional parameters, the optional parameters of the wording can not understand. such as the

Article 1: Why do I write the optional parameters in the PHP function prototype ?, The first article is the beginning. Write something simple. When I first started learning PHP, I encountered a problem when I was reading PHP Manual: In the

1, APC Cache introduction APC, the full name is alternative PHP cache, the official translation is called "Optional PHP cache." It provides us with a framework for caching and optimizing PHP's intermediate code. The APC cache is divided into two

PHP features: the command line mode starts with version 4.3.0. PHP provides a new type of cli sapi (Server Application Programming Interface, Server Application Programming Port) support, named CLI, command Line Interface, that is, Command Line