About PHP Json_encode does not support the object private properties of the explanation

This article describes a workaround for PHP Json_encode that does not support object private properties, Json_encode can convert an object to JSON format and use Json_decode to revert to an object.

However, if the object contains a private property, the private property is lost when the Json_encode is executed.

Example: Json_encode lost Object Private Property

<?php//user Class class user{public    $id = 1;    Public $name = ' fdipzone ';    Public $profession = ' Programmer ';    Private $age = 18;} Object $ouser = new user;//Json_encode$json = Json_encode ($oUser); echo $json;//Json_decode$ouser = Json_decode ($json); var _dump ($oUser);? >

Output:

{"id": 1, "name": "Fdipzone", "Profession": "Programmer"}object (StdClass) [2] public  ' id ' = = int 1 public  ' Name ' = ' + string ' fdipzone ' (length=8) public  ' profession ' = ' = String ' Programmer ' (length=10)

After Json_encode is executed, the private attribute age is lost.

Json_encode the object's private property loss resolution

The modified code is as follows:

<?php//user Class class implements jsonserializable{public    $id = 1;    Public $name = ' fdipzone ';    Public $profession = ' Programmer ';    Private $age =;    Implements an abstract class method that specifies the data that needs to be serialized JSON public    function jsonserialize () {        $data = [];        foreach ($this as $key = + $val) {            if ($val!== null) $data [$key] = $val;        }        return $data;    }} Object $ouser = new user;//Json_encode$json = Json_encode ($oUser); echo $json;//Json_decode$ouser = Json_decode ($json); var _dump ($oUser);? >

Output:

{"id": 1, "name": "Fdipzone", "Profession": "Programmer", "Age": 18}object (StdClass) [2] public  ' id ' = = int 1 Public  ' name ' = = String ' Fdipzone ' (length=8) public  ' profession ' = ' = String ' Programmer ' (length=10) C16/>public ' age ' = int 18

After specifying the data that needs to be serialized into JSON, Json_encode can read to the private attribute age.

This article explains the PHP Json_encode does not support the object of the private property of the relevant knowledge, more relevant content please focus on the PHP Chinese web.