php中有arguments吗,在PHP中命名参数(Named Arguments in PHP)

桃扇骨 2023-01-19 04:52 12阅读 0赞

在PHP中命名参数(Named Arguments in PHP)

在C＃中，有一个名为Named Arguments的4.0新功能，与Optional Parameters相得益彰。

private static void writeSomething(int a = 1, int b = 2)\{

// do something here;

static void Main()

writeSomething(b:3); // works pretty well

我正在使用此选项从用户获取一些设置值。

在PHP中，除了可选参数之外我找不到任何类似的东西，但我接受做$.fn.extend (jQuery)类函数：

function settings($options)

$defaults = array("name"=>"something","lastname"=>"else");

$settings = array\_merge($defaults,$options);

settigs(array("lastname"=>"John");

我想知道你正在使用什么样的解决方案，或者你会用于相同的情况。

In C\#, there is a new feature coming with 4.0 called Named Arguments and get along well with Optional Parameters.

private static void writeSomething(int a = 1, int b = 2)\{

// do something here;

static void Main()

writeSomething(b:3); // works pretty well

I was using this option to get some settings value from users.

In PHP, I cannot find anything similar except for the optional parameters but I am accepting doing $.fn.extend (jQuery) kind of function :

function settings($options)

$defaults = array("name"=>"something","lastname"=>"else");

$settings = array\_merge($defaults,$options);

settigs(array("lastname"=>"John");

I am wondering what kind of solutions you are using or you would use for the same situation.

原文：https://stackoverflow.com/questions/6800379

更新时间：2020-01-05 08:06

最满意答案

正如您所知，PHP中不存在命名参数。

但是一种可能的解决方案是使用一个数组作为唯一参数 - 因为数组项可以命名为：

my\_function(array(

'my\_param' => 10,

'other\_param' => 'hello, world!',

));

并且，在您的函数中，您将从该唯一数组参数中读取数据：

function my\_function(array $params) \{

// test if $params\['my\_param'\] is set ; and use it if it is

// test if $params\['other\_param'\] is set ; and use it if it is

// test if $params\['yet\_another\_param'\] is set ; and use it if it is

// ...

不过，这个想法有一个主要的不便之处：看看你的函数的定义，人们不知道它期望/他们可以通过什么参数。

他们每次想要调用你的功能时都必须阅读文档 - 这不是人们喜欢做的事情，是吗？

附加说明：IDE也无法提供提示; 和phpdoc也将被打破......

As you found out, named arguments don't exist in PHP.

But one possible solution would be to use one array as unique parameter -- as array items can be named :

my\_function(array(

'my\_param' => 10,

'other\_param' => 'hello, world!',

));

And, in your function, you'd read data from that unique array parameter :

function my\_function(array $params) \{

// test if $params\['my\_param'\] is set ; and use it if it is

// test if $params\['other\_param'\] is set ; and use it if it is

// test if $params\['yet\_another\_param'\] is set ; and use it if it is

// ...

Still, there is one major inconvenient with this idea : looking at your function's definition, people will have no idea what parameters it expects / they can pass.

They will have to go read the documentation each time they want to call your function -- which is not something one loves to do, is it ?

Additionnal note : IDEs won't be able to provide hints either ; and phpdoc will be broken too...

2011-07-23

php中有arguments吗,在PHP中命名参数(Named Arguments in PHP)

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