％s，％1 $ s等的含义是什么？

Question

％s，％1 $ s等的含义是什么？

- 14
- 69051 2013-09-27
从问答环节我遇到了一些旧事物,但是我担心自己处于一种状况,即我仍然不知道它们的含义,也不知道为什么使用它们.

%1$s-(找到用于加载小部件ID)

%2$s-(找到用于加载小部件类的类)

%s-(找到此处)

以下内容如何工作?我的意思是对代码格式的解释是什么?

!Website::getThemeOption("format_post/{$post_format}/content/hide")):-(找到此处)

if( !wp_verify_nonce( $_POST['my_noncename'] ) plugin_basename( __FILE__ ) ) return;-(找到此处)

这个问题可以继续下去,我知道.但是类似的事情在任何地方都没有清楚地解释.我不仅想要它们的含义和目的,还想要一些内在/核心的解释,以便我可以理解它们的动机以及它们的工作原理.

而且,如果在Codex中已经清楚地定义了这些内容,我希望阅读它们.如果这样的列表已经整理出来,并且希望有这样一个列表.
From a Q&A Thread I've came to meet with some old things, but I'm afraid, I found myself in a condition that, I still don't know the meaning of them and don't know why to use them.

%1$s - (found to load widget id)

%2$s - (found to load widget class/classes)

%s - (found here)

And how the following things work? I mean what's the explanation of the code-format?

!Website::getThemeOption("format_post/{$post_format}/content/hide")): - (found here)

if( !wp_verify_nonce( $_POST['my_noncename'] ) plugin_basename( __FILE__ ) ) return; - (found here)

This question can go on and on..., I know. But things like these are not clearly explained anywhere. I, not just want their meaning and purposes, but want some inner/core explanation so that I can understand their motives and how they works.

And also, if such things are already clearly defined in Codex, I'd love to read them. And would love to have a list of such curious things if such a list is already sorted out.
php code

- 这都是纯PHP.参见[`sprintf()`](http://www.php.net/manual/zh/function.sprintf.php).
  
  This is all plain PHP. See [`sprintf()`](http://www.php.net/manual/en/function.sprintf.php).
  - 3
  - 2013-09-27
  - fuxia
- 该Codex可以提供WordPress特定的文档.它并非旨在教授PHP编程,并且您所有的问题都与PHP编程有关.可以在[php.net](http://php.net/)上找到PHP文档,并且可以使用Google找到许多PHP初学者教程.
  
  The Codex exists to provide WordPress-specific documentation. It is not intended to teach PHP programming, and all of your questions are about PHP programming. PHP documentation can be found at [php.net](http://php.net/), and lots of PHP beginner tutorials can by found using Google.
  - 0
  - 2013-09-27
  - Ben Miller - Remember Monica
- @BenMiller:请耐心等待.在toscho发表评论之前,我什至不知道问题的立场.戴夫的答案现在几乎很清楚.
  
  @BenMiller: Be patient please. Before toscho's comment, I's even unaware about the question's position. It's almost clear now with Dave's answer.
  - 2
  - 2013-09-27
  - Mayeenul Islam
- @MayeenulIslam,我只是想解释一下为什么您在法典中找不到这样的解释.如果遇到不耐烦的事,我感到抱歉.
  
  @MayeenulIslam, I was simply attempting to explain why you don't find such explanations in the Codex. I'm sorry if I came across as impatient.
  - 0
  - 2013-09-27
  - Ben Miller - Remember Monica

1 个回答

投票数

Dave Ross · Accepted Answer · 2013-09-27

11

2013-09-27

这实际上更像是一个一般的PHP编程问题,因此可能会被关闭.但是在那之前,让我们看看是否能帮您解决其中的一些问题.

以％符号开头的字符串为"printf格式" .例如,%2$s转换为"用第二个参数替换此令牌,并将其视为字符串".

当您在字符串中的大括号中看到变量时,例如"Today is {$day}",这与将变量没有大括号时放置在此处一样,例如"Today is $day".但是像这样格式化变量会使它脱颖而出,因此,很显然那里有一个变量.它还可以防止变量名称旁边的其他字符被解释为该名称的一部分.没有花括号,PHP会知道如何处理"Your robot name would be {$firstName}Number5"吗?它会看到"$firstNameNumber5"并查找名为$firstNameNumber5的变量,而不是简单的$firstName.

我不确定您在上一个示例中要问什么.是您感到困惑的__FILE__吗?这是一个 PHP Magic Constant ,它已替换为文件的完整路径那段代码在里面.

在关闭之前,只有最后一个简单的网址:`！Website ::`.为什么在那里有双冒号?

Before getting closed just the last simple one: `!Website::`. Why the double colon there?
- 0
- 2013-09-27
- Mayeenul Islam
`::`与[面向对象编程](http://php.net/manual/en/oop5.intro.php)有关-在`Website ::getThemeOption`的情况下,调用属于类"网站"的函数"getThemeOption".

The `::` has to do with [object-oriented programming](http://php.net/manual/en/oop5.intro.php) -- in the case of `Website::getThemeOption`, you're calling the function `getThemeOption` belonging to the class `Website`.
- 2
- 2013-09-27
- Pat J
还有:`{$ var}`可以帮助PHP区分类似`{$ complete_variable_name}`和`{$prefix} _rest_of_name`之类的东西.

Also: `{$var}` helps PHP distinguish between something like `{$complete_variable_name}` and `{$prefix}_rest_of_name`, for example.
- 2
- 2013-09-27
- Pat J
FIY双冒号仅用于访问静态或重写的类的方法和类的属性,而常规方法则使用->例如$myObject-> someMethod();

FIY double colon is used to access only static or overridden methods and properties of a class, with regular methods you use -> e.g. $myObject->someMethod();
- 0
- 2015-06-11
- ed-ta