You can pass data from PHP to javascript but the only way to get data from javascript to PHP is via AJAX. The reason for that is you can build a valid javascript through PHP but to get data to PHP you will need to get PHP running again, and since PHP only runs to process the output, you will need a page reload or an asynchronous query.
For More Information Please Refer:
https://stackoverflow.com/questions/406316/how-to-pass-data-from-javascript-to-php-and-vice-versa
You May Also Like to Read: