Wordpress plugin WP_error - wordpress

Question

I installed ISMS Plugin into my wordpress in order to try out the SMS service through Wordpress. However an error appeared when I click on the iSMS setting on the plugin menu.
Here is the error:
**
Fatal error: Cannot use object of type WP_Error as array in C:\wamp\www\wordpress\wp-content\plugins\isms\isms-model.php on line 17**
and here's the code for line 17:
$result = $response[body];
here is the full code for isms-model.php
<?php
class Mobiweb_ISMS_Model {
// iSMS API
protected static $api_balance = 'https://www.isms.com.my/isms_balance.php';
protected static $api_send = 'https://www.isms.com.my/isms_send.php';
public static function get_balance() {
$username = get_option('setting_username');
$password = get_option('setting_password');
$link = self::$api_balance.'?';
$link .= "un=".urlencode($username);
$link .= "&pwd=".urlencode($password);
$response = wp_remote_get($link);
$result = $response[body];
$balance = (float)$result;
if ($balance < 0) return substr($result, 8);
else return $result;
}
public static function send_isms($destination, $message, $messageType, $senderID = '') {
$username = get_option('setting_username');
$password = get_option('setting_password');
$link = self::$api_send.'?';
$link .= "un=".urlencode($username);
$link .= "&pwd=".urlencode($password);
$link .= "&dstno=".urlencode($destination);
$link .= "&msg=".urlencode($message);
$link .= "&type=".urlencode($messageType);
$link .= "&sendid=".urlencode($senderID);
$response = wp_remote_get($link);
try {
$result = $response[body];
$resultValue = (float)$result;
if ($resultValue < 0) {
return array(
'code'=>$resultValue,
'message'=>substr($result, 8)
);
} else {
return array(
'code'=>'2000',
'message'=>$result
);
}
} catch (Exception $e) {
$message = $e->getMessage();
return array(
'code'=>'-9999',
'message'=>$message
);
}
}
}
?>
What should I do to fix it? Any advise?

Answer 1

This plugin is badly written.
wp_remote_get() returns a WP_Error object when there's an error. Therefore, at least for debugging it and seeing what the error is, I would suggest you change it from:
$response = wp_remote_get($link);
$result = $response[body];
to
$response = wp_remote_get($link);
if (is_wp_error($response)) {
die($response->get_error_message());
}
$result = $response['body'];