blocks|key|2786554|text|classname::property;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2786555|我想就是这样了。|unstyled|2786556|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>classname::property;
</code></pre>

I think that's it.

blocks|key|2786586|text|您可以使用双冒号(如果愿意，可以使用令牌+)访问它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2786587|class+X+{
++++public+static+$var+=+13;
}
echo+X::$var;|code-block|syntax|javascript|2786588|这里也支持可变变量：|2786589|$class+=+'X';
echo+$class::$var;|2786590|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/tokens.php|1|http://www.php.net/manual/en/language.variables.variable.php^0|I|2|0|0|0|5|4|1|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|K|3|L|5|F|7|15|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

You access them using the double colon (or the <a href="http://www.php.net/manual/en/tokens.php" rel="nofollow"><code>T_PAAMAYIM_NEKUDOTAYIM</code> token</a> if you prefer)

<pre><code>class X {
 public static $var = 13;
}
echo X::$var;
</code></pre>

<a href="http://www.php.net/manual/en/language.variables.variable.php" rel="nofollow">Variable variables</a> are supported here, too:

<pre><code>$class = 'X';
echo $class::$var;
</code></pre>

blocks|key|1230493|text|您需要首先查找类名：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1230494|$class+=+get_class($thing);
$class::$property|code-block|syntax|javascript|1230495|当然，$property必须定义为static和public。|offset|length|style|CODE|1230496|entityMap^0|0|0|H|6|O|6|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

You need to lookup the class name first:

<pre><code>$class = get_class($thing);
$class::$property
</code></pre>

$property must be defined as <code>static</code> and <code>public</code> of course.

blocks|key|2786635|text|您应该了解静态属性的含义。静态属性或方法不适用于对象。它们被全班直接使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2786636|你可以通过|2786637|Class_name::static_property_name|code-block|syntax|javascript|2786638|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You should understand what the static property means. Static property or method is not for the objects. They are directly used by the class.

you can access them by 

<pre><code>Class_name::static_property_name
</code></pre>

blocks|key|2427339|text|class+testClass+{
++++public+static+$property+=+"property+value";
++++public+static+$property2+=+"property+value+2";
}
echo+testClass::$property;
echo+testClass::property2;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2427340|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>class testClass {
 public static $property = "property value";
 public static $property2 = "property value 2";
}
echo testClass::$property;
echo testClass::property2;
</code></pre>

blocks|key|2427375|text|从类实例内部可以简单地使用self::...|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2427376|class+Person+{
++public+static+$name+=+'Joe';
++public+function+iam()+{
++++echo+'My+name+is+'+.+self::$name;
++}
}

$me+=+new+Person();
$me->iam();+//+displays+"My+name+is+Joe"|code-block|syntax|javascript|2427377|entityMap^0|D|9|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

From inside a class instance you can simply use <code>self::...</code>

<pre><code>class Person {
 public static $name = 'Joe';
 public function iam() {
 echo 'My name is ' . self::$name;
 }
}

$me = new Person();
$me-&gt;iam(); // displays "My name is Joe"
</code></pre>

blocks|key|2786699|text|现在，有一个非常简单，干净的方法来做这件事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2786700|<?php
namespace+Foo;
class+Bar
{
++++public+static+$baz=1;
++++//...

++++public+function+__toString()
++++{
++++++++return+self::class;
++++}

}

echo+Bar::$baz;+//+returns+1
$bar+=+new+Bar();
echo+$bar::$baz;+//+returns+1|code-block|syntax|javascript|2786701|您还可以使用PHP+7中的属性来完成此操作。|2786702|<?php
namespace+Foo;
class+Bar
{
++++public+static+$baz=1;
++++public+$class=self::class;
++++//...

}

$bar+=+new+Bar();
echo+$bar->class::$baz;+//+returns+1|2786703|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

These days, there is a pretty simple, clean way to do this.

<pre><code>&lt;?php
namespace Foo;
class Bar
{
 public static $baz=1;
 //...

 public function __toString()
 {
 return self::class;
 }

}

echo Bar::$baz; // returns 1
$bar = new Bar();
echo $bar::$baz; // returns 1
</code></pre>

You can also do this with a property in PHP 7.

<pre><code>&lt;?php
namespace Foo;
class Bar
{
 public static $baz=1;
 public $class=self::class;
 //...

}

$bar = new Bar();
echo $bar-&gt;class::$baz; // returns 1
</code></pre>

blocks|key|2427428|text|如果你不想|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2427429|$class+=+get_class($instance);
$var+=+$class::$staticvar;|code-block|syntax|javascript|2427430|因为您发现它的两行太长，所以可以使用其他选项：|2427431|1.写一个吸气器|2427432|<?php
class+C+{
++static+$staticvar+=+"STATIC";
++function+getTheStaticVar()+{
++++return+self::$staticvar;
++}
}
$instance+=+new+C();
echo+$instance->getTheStaticVar();|2427433|简单而优雅，但您必须为正在访问的每个静态变量编写一个getter。|2427434|2.编写一个通用静态吸气器。|2427435|<?php
class+C+{
++static+$staticvar+=+"STATIC";
++function+getStatic($staticname)+{
++++return+self::$$staticname;
++}
}
$instance+=+new+C();
echo+$instance->getStatic('staticvar');|2427436|这将允许您访问任何静态，虽然它仍然有点长-卷。|2427437|3.写一个神奇的方法|2427438|class+C+{
++static+$staticvar+=+"STATIC";
++function+__get($staticname)+{
++++return+self::$$staticname;
++}
}
$instance+=+new+C();
echo+$instance->staticvar;|2427439|这一个允许您实例访问任何静态变量，就好像它是对象的局部变量一样，但它可能被认为是一个邪恶的可憎的东西。|2427440|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1A|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1B|8|@]|9|@]|A|$]]|$1|W|3|X|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|Y|3|Z|5|6|7|1D|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|11|$]]

If you'd rather not

<pre><code>$class = get_class($instance);
$var = $class::$staticvar;
</code></pre>

because you find its two lines too long, you have other options available:

<h3>1. Write a getter</h3>

<pre><code>&lt;?php
class C {
 static $staticvar = "STATIC";
 function getTheStaticVar() {
 return self::$staticvar;
 }
}
$instance = new C();
echo $instance-&gt;getTheStaticVar();
</code></pre>

Simple and elegant, but you'd have to write a getter for every static variable you're accessing.

<h3>2. Write a universal static-getter</h3>

<pre><code>&lt;?php
class C {
 static $staticvar = "STATIC";
 function getStatic($staticname) {
 return self::$$staticname;
 }
}
$instance = new C();
echo $instance-&gt;getStatic('staticvar');
</code></pre>

This will let you access any static, though it's still a bit long-winded.

<h3>3. Write a magic method</h3>

<pre><code>class C {
 static $staticvar = "STATIC";
 function __get($staticname) {
 return self::$$staticname;
 }
}
$instance = new C();
echo $instance-&gt;staticvar;
</code></pre>

This one allows you instanced access to any static variable as if it were a local variable of the object, but it may be considered an unholy abomination.

If I have an instance in PHP, what's the easiest way to get to a static property ('class variable') of that instance ?

This

<pre><code>$classvars=get_class_vars(get_class($thing));
$property=$classvars['property'];
</code></pre>

Sound really overdone. I would expect

<pre><code>$thing::property
</code></pre>

or

<pre><code>$thing-&gt;property
</code></pre>

<blockquote>
 EDIT: this is an old question. There are more obvious ways to do this in newer
 PHP, search below.
</blockquote>

Get a static property of an instance

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如果我在PHP中有一个实例，那么获得该实例的静态属性('class变量‘)最简单的方法是什么？这$classvars=get_class_vars(get_class($thing));$property=$classvars['property'];听起来有点过火了。我希望$thing::property或$thin...

问获取实例的静态属性
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