无法访问空属性 - Sendgrid

Question

Trying to use Sendgrid's API (running on bluemix) to send automated emails.

$sendgrid_username = 'XXXXXXXXX';
$sendgrid_password = 'XXXXXXXXXXXXXXX';
$to                = $_SESSION['emailto'];
$from              = "[e-mail]";
$sendgrid = new SendGrid($sendgrid_username, $sendgrid_password, array("turn_off_ssl_verification" => true));
$email    = new SendGrid\Email();
$email->addTo($to)->
       setFrom($from)->
       setSubject('Password Reset')->
       setHtml("<b>A new password has been set for the user: %mailto%.<br> The new password is:                                                                            %pass%<br><br></b>")->
       addSubstitution("%mailto%", array($_SESSION['emailto']))->
       addSubstitution("%pass%", array($random_pass_clear))->
       addHeader('X-Sent-Using', 'SendGrid-API')->
       addHeader('X-Transport', 'web')->
$response = $sendgrid->send($email); //this is line 21

I've used the example code from Sendgrid and everything is working (email i being sent). I do however get 2 errors:

PHP NOTICE: Undefined Variable response on line 21
PHP FATAL ERROR: Cannot access empty property on line 21

I've never encountered the second error before and I'm kind of confused as to what is going on... any idea's where I went wrong?

Answer 1

addHeader('X-Transport', 'web')-> this excess T_OBJECT_OPERATOR (->) on line 20 is your bad guy.

It tries to use a $response variable in $email object on line 21.

Ignoring previous chaining, it essentially is trying to do this:

$email->$response = $sendgrid->send($email);

The sending is done, but it fails to put the method-result in the $email->$response variable (Cannot access empty property) because $email->$response is never defined (Undefined Variable)