I think the entry point of the dynamic library in the webserver is not correct.
Do you use xampp? If not, the path to c: \ xampp \ php \ ext is not correct.
Which web server do you use? Where is your php directory?
Do you have written in your php.ini, under the chapter “Dynamic Extensions” the line:
extension=php_zmq.dll ?
Exist the file “php_zmq.dll” in your PHP-Extension Folder?
Greetings from Germany
Torsten