I am trying to have an email sent every time a page is published. I am thinking of using onBeforePublish() for that.

To test it, I created a new page class :

class PageEmail extends Page {

function onBeforePublish() {
      
    parent::onBeforePublish();
            
      
      $subject = 'Page published '.$this->Title;
      
   
      $email = new Email();
      $email->setTo("myemail@yahoo.com");
      $email->setFrom( Email::getAdminEmail());
      $email->setSubject($subject);
      
    $email->send();
   
      
}
}

When I try to "publish" a page of this type , I get the error message :

Error: Uncaught Exception: Object->__call(): the method 'onbeforepublish' does not exist on 'PageEmail'
At line 724 in /public_html/mydomain/silverstripe/sapphire/core/Object.php

Note that if I replace "onBeforePublish" with "onBeforeWrite" in the class definition, I get the email *twice* even though the function is not in page.php.

I also noticed that the function name in the error message is all in lower cases but I don't know if this is relevant.

I am obviously doing something wrong. Could you please point me in the right direction? ( I run version 2.4 of SilverStripe )

Thank you.

Note that if I replace "onBeforePublish" with "onBeforeWrite" in the class definition, I get the email *twice* even though the function is not in page.php.

When you publish a page it requires 2 writes by the ORM.

onBeforePublish() is different from onBeforeWrite() in that onBeforePublish is a extension (mix-in) function so parent::onBeforePublish() won't refer to anything in this case. Try remove that reference and include the parameter $object as per the function call definition.