Exception error with message cannot use object of type stdclass as array

229

votes

Answer

Solution:

You must access it using -> since its an object.

Change your code from:

$result['context'];

To:

$result->context;

859

votes

Answer

Solution:

Usetrue as the second parameter tojson_decode. This will decode the json into an associative array instead ofstdObject instances:

$my_array = json_decode($my_json, true);

See the documentation for more details.

618

votes

Answer

Solution:

Have same problem today, solved like this:

If you calljson_decode($somestring) you will get an Object and you need to access like$object->key , but if u calljson_decode($somestring, true) you will get an dictionary and can access like$array['key']

659

votes

Answer

Solution:

It’s not an array, it’s an object of type stdClass.

You can access it like this:

echo $oResult->context;

More info here: What is stdClass in PHP?

289

votes

Answer

Solution:

As the Php Manual say,

print_r — Prints human-readable information about a variable

When we usejson_decode();, we get an object of type stdClass as return type.
The arguments, which are to be passed inside ofprint_r() should either be an array or a string. Hence, we cannot pass an object inside ofprint_r(). I found 2 ways to deal with this.

1. Cast the object to array.
   This can be achieved as follows.

   $a = (array)$object;
   

2. By accessing the key of the Object
   As mentioned earlier, when you usejson_decode(); function, it returns an Object of stdClass. you can access the elements of the object with the help of-> Operator.

   $value = $object->key;
   

One, can also use multiple keys to extract the sub elements incase if the object has nested arrays.

$value = $object->key1->key2->key3...;

Their are other options toprint_r() as well, likevar_dump(); andvar_export();

P.S : Also, If you set the second parameter of thejson_decode(); totrue, it will automatically convert the object to anarray();
Here are some references:
http://php.net/manual/en/function.print-r.php
http://php.net/manual/en/function.var-dump.php
http://php.net/manual/en/function.var-export.php

83

votes

Answer

Solution:

To get an array as result from a json string you should set second param as boolean true.

$result = json_decode($json_string, true);
$context = $result['context'];

Otherwise $result will be an std object. but you can access values as object.

  $result = json_decode($json_string);
 $context = $result->context;

833

votes

Answer

Solution:

Try something like this one!

Instead of getting the context like:(this works for getting array index’s)

$result['context']

try (this work for getting objects)

$result->context

Other Example is: (if$result has multiple data values)

Array
(
    [0] => stdClass Object
        (
            [id] => 15
            [name] => 1 Pc Meal
            [context] => 5
            [restaurant_id] => 2
            [items] => 
            [details] => 1 Thigh (or 2 Drums) along with Taters
            [nutrition_fact] => {"":""}
            [servings] => menu
            [availability] => 1
            [has_discount] => {"menu":0}
            [price] => {"menu":"8.03"}
            [discounted_price] => {"menu":""}
            [thumbnail] => YPenWSkFZm2BrJT4637o.jpg
            [slug] => 1-pc-meal
            [created_at] => 1612290600
            [updated_at] => 1612463400
        )

)

Then try this:

foreach($result as $results)
{
      $results->context;
}

957

votes

Answer

Solution:

Sometimes when working with API you simply want to keep an object an object. To access the object that has nested objects you could do the following:

We will assume when you print_r the object you might see this:

print_r($response);

stdClass object
(
    [status] => success
    [message] => Some message from the data
    [0] => stdClass object
        (
            [first] => Robert
            [last] => Saylor
            [title] => Symfony Developer
        )
    [1] => stdClass object
        (
            [country] => USA
        )
)

To access the first part of the object:

print $response->{'status'};

And that would output «success»

Now let’s key the other parts:

$first = $response->{0}->{'first'};
print "First name: {$first}<br>";

The expected output would be «Robert» with a line break.

You can also re-assign part of the object to another object.

$contact = $response->{0};
print "First Name: " . $contact->{'first'} . "<br>";

The expected output would be «Robert» with a line break.

To access the next key «1» the process is the same.

print "Country: " . $response->{1}->{'country'} . "<br>";

The expected output would be «USA»

Hopefully this will help you understand objects and why we want to keep an object an object. You should not need to convert an object to an array to access its properties.

679

votes

Answer

Solution:

You can convert stdClass object to array like:

$array = (array)$stdClass;

stdClsss to array

759

votes

Answer

Solution:

When you try to access it as$result['context'], you treating it as an array, the error it’s telling you that you are actually dealing with an object, then you should access it as$result->context

658

votes

Answer

Solution:

Here is the function signature:

mixed json_decode ( string $json [, bool $assoc = false [, int $depth = 512 [, int $options = 0 ]]] )

When param is false, which is default, it will return an appropriate php type. You fetch the value of that type using object.method paradigm.

When param is true, it will return associative arrays.

It will return NULL on error.

If you want to fetch value through array, set assoc to true.

954

votes

Answer

Solution:

I got this error out of the blue because my facebook login suddently stopped working (I had also changed hosts) and throwed this error. The fix is really easy

The issue was in this code

  $response = (new FacebookRequest(
    FacebookSession::newAppSession($this->appId, $this->appSecret),
    'GET',
    '/oauth/access_token',
    $params
  ))->execute()->getResponse(true);

  if (isset($response['access_token'])) {       <---- this line gave error
    return new FacebookSession($response['access_token']);
  }

Basically isset() function expect an array but instead it find an object. The simple solution is to convert PHP object to array using (array) quantifier. The following is the fixed code.

  $response = (array) (new FacebookRequest(
    FacebookSession::newAppSession($this->appId, $this->appSecret),
    'GET',
    '/oauth/access_token',
    $params
  ))->execute()->getResponse(true);

Note the use off array() quantifier in first line.

141

votes

Answer

Solution:

instead of using the brackets use the object operator for example my array based on database object is created like this in a class called DB:

class DB {
private static $_instance = null;
private $_pdo,
        $_query, 
        $_error = false,
        $_results,
        $_count = 0;



private function __construct() {
    try{
        $this->_pdo = new PDO('mysql:host=' . Config::get('mysql/host') .';dbname=' . Config::get('mysql/db') , Config::get('mysql/username') ,Config::get('mysql/password') );


    } catch(PDOException $e) {
        $this->_error = true;
        $newsMessage = 'Sorry.  Database is off line';
        $pagetitle = 'Teknikal Tim - Database Error';
        $pagedescription = 'Teknikal Tim Database Error page';
        include_once 'dbdown.html.php';
        exit;
    }
    $headerinc = 'header.html.php';
}

public static function getInstance() {
    if(!isset(self::$_instance)) {
        self::$_instance = new DB();
    }

    return self::$_instance;

}


    public function query($sql, $params = array()) {
    $this->_error = false;
    if($this->_query = $this->_pdo->prepare($sql)) {
    $x = 1;
        if(count($params)) {
        foreach($params as $param){
            $this->_query->bindValue($x, $param);
            $x++;
            }
        }
    }
    if($this->_query->execute()) {

        $this->_results = $this->_query->fetchAll(PDO::FETCH_OBJ);
        $this->_count = $this->_query->rowCount();

    }

    else{
        $this->_error = true;
    }

    return $this;
}

public function action($action, $table, $where = array()) {
    if(count($where) ===3) {
        $operators = array('=', '>', '<', '>=', '<=');

        $field      = $where[0];
        $operator   = $where[1];
        $value      = $where[2];

        if(in_array($operator, $operators)) {
            $sql = "{$action} FROM {$table} WHERE {$field} = ?";

            if(!$this->query($sql, array($value))->error()) {
            return $this;
            }
        }

    }
    return false;
}

    public function get($table, $where) {
    return $this->action('SELECT *', $table, $where);

public function results() {
    return $this->_results;
}

public function first() {
    return $this->_results[0];
}

public function count() {
    return $this->_count;
}

}

to access the information I use this code on the controller script:

<?php
$pagetitle = 'Teknikal Tim - Service Call Reservation';
$pagedescription = 'Teknikal Tim Sevice Call Reservation Page';
require_once $_SERVER['DOCUMENT_ROOT'] .'/core/init.php';
$newsMessage = 'temp message';

$servicecallsdb = DB::getInstance()->get('tt_service_calls', array('UserID',
 '=','$_SESSION['UserID']));

if(!$servicecallsdb) {
// $servicecalls[] = array('ID'=>'','ServiceCallDescription'=>'No Service Calls');
} else {
$servicecalls = $servicecallsdb->results();
}
include 'servicecalls.html.php';



?>

then to display the information I check to see if servicecalls has been set and has a count greater than 0 remember it’s not an array I am referencing so I access the records with the object operator «->» like this:

<?php include $_SERVER['DOCUMENT_ROOT'] .'/includes/header.html.php';?>
<!--Main content-->
<div id="mainholder"> <!-- div so that page footer can have a minum height from the
  header -->
<h1><?php if(isset($pagetitle)) htmlout($pagetitle);?></h1>
<br>
<br>
<article>
    <h2></h2>
</article>
<?php
if (isset($servicecalls)) {
if (count ($servicecalls) > 0){
     foreach ($servicecalls as $servicecall) {
        echo '<a href="/servicecalls/?servicecall=' .$servicecall->ID .'">'
  .$servicecall->ServiceCallDescription .'</a>';
    }
}else echo 'No service Calls';

}

?>
<a href="/servicecalls/?new=true">Raise New Service Call</a>
</div> <!-- Main content end-->
<?php include $_SERVER['DOCUMENT_ROOT'] .'/includes/footer.html.php'; ?>

825

votes

Answer

Solution:

Change it for

$results->fetch_array()