PHPMailer 找不到 SMTP 类

Question

i've installed PHPMailer over composer on hostinger.com (webhost). The original version of PHPMailer was 5.0 so I upgraded to 6.6 after i came across this error when submitting a ContactForm7 WordPress plugin form.

Fatal error: Uncaught Error: Class 'PHPMailer\PHPMailer\SMTP' not found in /home/uxxxxxxxx/domains/rebelcitytour.com/public_html/staging25/wp-includes/PHPMailer/PHPMailer.php:1953

I've upgraded to version 6.6 of PHPMailer, I've checked the PHPMailer folder. It exists. And has three files in it...

Exception.php  PHPMailer.php  SMTP.php

Yet, the plugin PHP code can't seem to find SMTP class? Weird right?

I've included this code in load.php of my plugin root director...

require_once '/staging25/wp-includes/PHPMailer/SMTP.php';    

Link to bug on system

Answer 1

Yes, like suggested above. It was a namespace issue caused by a dev declaring a global variable in local scope.