Transformation example of a class in php

This article mainly introduces the php class conversion examples, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Class (class) conversion

Here is a class for PHP:

Class Foo {const ERROR_CODE = '404; public $public_ex =' this is public'; private $private_ex = 'this is privatekeeper; protected $protected_ex =' this should be protected'; public function getErrorCode () {return self::ERROR_CODE;}}

Now, perform a json transformation on an instance of this class:

$foo = new Foo;$foo_json = json_encode ($foo); echo $foo_json

The output is

{"public_ex": "this is public"}

As you can see, everything else (constants, private variables, methods, and so on) is lost except public variables (public).

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