符号是什么意思：在php中意味着什么？

I used print_r on some variables of a framework to figure out their contents and what i saw was like this

我在框架的一些变量上使用print_r来弄清楚它们的内容,我看到的是这样的

Array (
   [pages:navigation] => Navigation
   [pages:via] => via pages
   [item:object:page_top] => Top-level pages
)

I thought this was ok because i can create arrays like

我认为这很好,因为我可以创建像这样的数组

$ar=array('pages:navigation' => 'Navigation',
           'pages:via' => 'via pages');

and it would be no problem but when i create this

这将是没有问题,但当我创建这个

class student {
   public $name;
   public function get_name()  {
      return $name;
   }
   private $id;
   public function get_id() {
      return $id;
   }
   protected $email;
}

$s = new student();
$s->name="hi";
print_r($s);

I get this:

我明白了:

student Object ( [name] => hi [id:student:private] => [email:protected] => )

here the symbol : is automatically inserted for id indicating that it is a member of student and is private but it is not inserted for public member name

这里符号:自动插入id表示它是学生的成员并且是私有的,但是没有插入公共成员名称

I cant figure out what does the symbol : actually mean? Is it some kind of namespacing?

我无法弄清楚这个符号是什么意思?它是某种命名空间吗?

2 个解决方案

#1

In the array, it has no special meaning. It's just part of the string key; an array key can be any string or integer.

在数组中,它没有特殊含义。它只是字符串键的一部分;数组键可以是任何字符串或整数。

In the object, it's just how print_r displays property names for private properties.

在对象中,print_r显示私有属性的属性名称。

In id:student:private, id is the property name, student the class in which the property is declared, and private is the visibility of the property.

在id:student:private中,id是属性名称,student是声明属性的类,private是属性的可见性。

#2

Chances are it's what the script/page is using to separate values in the key of the array. They may use spaces in key names so using a space wasn't acceptable and needed a character that wouldn't normally be found in the value itself.

有可能是脚本/页面用于分隔数组键中的值。它们可能在键名中使用空格,因此使用空格是不可接受的,并且需要通常在值本身中找不到的字符。

Much like namespaces in many other languages use the . as a delimiter, that script decided to use : (which is then parsed at a later date most likely and used as its originally intended).

很像许多其他语言中的命名空间使用。作为分隔符,该脚本决定使用:(然后在最近的日期对其进行解析,并将其用作最初的预期)。

Without seeing the script in it's entirety, this would only be a guess as to implementation.

如果没有完整地看到脚本,这只是对实现的猜测。

#1