- [changed plugin directory in wp](https://wordpress.stackexchange.com/questions/120075/how-to-change-location-of-the-plugins-wordpress-themes-folder)
- googlemap api key :  AIzaSyCvdGV2ssD4ov4a9CuIlQhoJyz5gWWiSvE
- [discussion on googlemap wp implementation](https://wordpress.org/support/topic/google-maps-where-to-place-api-key/)
- [exemple of googlemap plugin creation](https://www.inkthemes.com/implement-google-map-plugin-for-wordpress/)
	- [Error: not a valid JSON response](https://wordpress.org/support/topic/publishing-failed-error-message-the-response-is-not-a-valid-json-response-2/)
	- [permalink broken](https://wordpress.org/support/topic/permalinks-change-breaks-all-links/)
- [console.log in php](https://stackify.com/how-to-log-to-console-in-php/)
- [plugins_url with symlink pbm](https://wordpress.stackexchange.com/questions/102681/plugins-url-file-wp-plugin-url-with-sym-links)
- [make nginx follow symlinks](https://unix.stackexchange.com/questions/157022/make-nginx-follow-symlinks)
- [nginx not following symlink maybe due to permissions](https://stackoverflow.com/questions/12624358/nginx-not-following-symlinks)
- [symlink pbm with php-fpm](https://joshtronic.com/2019/07/29/symlinks-with-nginx-and-php-fpm/)
- [my post on unix stack](https://unix.stackexchange.com/questions/722503/symlink-doent-works-with-nginx-and-php-fpm-and-docker/722511#722511)
- [my post on wordpress stack](https://wordpress.stackexchange.com/questions/410735/i-dont-understand-how-symlinks-in-plugin-work)
- [maps api in php](http://www.learningaboutelectronics.com/Articles/Google-maps-API-JSON-PHP.php)
- [google maps api url parameters](https://developers.google.com/maps/documentation/javascript/url-params)
- [google maps api references](https://developers.google.com/maps/documentation/javascript/reference)
- [remove marker cluster](https://googlemaps.github.io/js-markerclusterer/classes/MarkerClusterer.html#removeMarker)