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get_class_vars

(PHP 4, PHP 5, PHP 7)

get_class_vars返回由类的默认属性组成的数组

说明

get_class_vars ( string $class_name ) : array

返回由类的默认公有属性组成的关联数组。

参数

class_name

类名

返回值

Returns an associative array of declared properties visible from the current scope, with their default value. The resulting array elements are in the form of varname => value. In case of an error, it returns FALSE.

更新日志

版本 说明
5.0.3 get_class_vars() will only return the properties that can be accessed from the current scope.
5.0.2 Calling get_class_vars() will now expose all the properties as an array, unlike previous behaviour where protected and private properties were prefixed with nul bytes.
5.0.1 Calling get_class_vars() will expose all properties, as when converting an object to a class.

范例

Example #1 get_class_vars() example

<?php

class myclass {

    var 
$var1// this has no default value...
    
var $var2 "xyz";
    var 
$var3 100;
    private 
$var4;

    
// constructor
    
function __construct() {
        
// change some properties
        
$this->var1 "foo";
        
$this->var2 "bar";
        return 
true;
    }

}

$my_class = new myclass();

$class_vars get_class_vars(get_class($my_class));

foreach (
$class_vars as $name => $value) {
    echo 
"$name : $value\n";
}

?>

以上例程会输出:

var1 :
var2 : xyz
var3 : 100

Example #2 get_class_vars() and scoping behaviour

<?php
function format($array)
{
    return 
implode('|'array_keys($array)) . "\r\n";
}

class 
TestCase
{
    public 
$a    1;
    protected 
$b 2;
    private 
$c   3;

    public static function 
expose()
    {
        echo 
format(get_class_vars(__CLASS__));
    }
}

TestCase::expose();
echo 
format(get_class_vars('TestCase'));
?>

以上例程会输出:

// 5.0.0
a| * b| TestCase c
a| * b| TestCase c

// 5.0.1 - 5.0.2
a|b|c
a|b|c

// 5.0.3 +
a|b|c
a

参见