CODEWITHSUNDEEP
phparraysjson
user1825286
user1825286

Reputation: 201

object to json in php

hi guys i got a problem . while i was implementing some code i reached the point that i need to use toJson method in each object

so inside the class i have added this code 

public function toJson(){
   return json_encode($this);  // $this which refers to the current object 

}

it has returned just {} so i knew that it does not recognize the properties of this class so instead i have tried to convert it like that 

public function toJson(){
   $array=(array)$this;
   return json_encode($array);

}

i got weird result 

string '{"\u0000Response\u0000status":0,"\u0000Response\u0000data":null,"\u0000Response\u0000error":" type non valide "}' (length=112)

i could eventually write customized json object

like this 

 public function toJson(){
       $myjson="{field1:data1,field2:data2}";
       return $myjson;

    }

but i do not want to return back to it each time that i add new property

i appreciate if you have any idea about why converting this does not work

Upvotes: 0

Views: 53

Answers (2)

Cody A. Ray
Cody A. Ray

Reputation: 6017

This usage works for me with primitives, arrays, associate arrays, and objects:

<?php

class Test {
  var $a = "1";
  var $b = array(3, 5, "cat", "monkey");
  var $c = array("animal" => "dromedary");
  public function toJson() {
    return json_encode($this);
  }
}

$test = new Test();
$test->d = new Test();
echo $test->toJson();

?>

Running it results in the expected JSON output:

$ php test.php 
{"a":"1","b":[3,5,"cat","monkey"],"c":{"animal":"dromedary"},"d":{"a":"1","b":[3,5,"cat","monkey"],"c": {"animal":"dromedary"}}}

I'm still running PHP 5.3.15.

Upvotes: 1

Shoe
Shoe

Reputation: 76240

You need to convert the object properties to array before encoding to JSON:

public function toJson(){
   return json_encode(get_object_vars($this));
}

As you can see, you can use get_object_vars to accomplish that.

Upvotes: 1

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