php 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

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

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