I was wondering if you could tell what kind of settings do you like to sync, IDE-related? In this case, there are several options to sync IDE settings but no FTP among these, sorry:
If you are talking about using FTP deployment sync automatically, there is an option "Upload changed files automatically to the default server" in "Build, Execution, Deployment | Deployment | Options" section:
I was wondering if you could tell what kind of settings do you like to sync, IDE-related? In this case, there are several options to sync IDE settings but no FTP among these, sorry:
https://www.jetbrains.com/help/phpstorm/sharing-your-ide-settings.html
If you are talking about using FTP deployment sync automatically, there is an option "Upload changed files automatically to the default server" in "Build, Execution, Deployment | Deployment | Options" section:
https://www.jetbrains.com/help/phpstorm/settings-deployment-options.html
If both my assumptions above are incorrect, please let me know what is your scenario.