In App Engine, the local file system that your application is deployed to is not writeable. This behavior ensures the security and scalability of your application.
However, if the application needs to write and read files at runtime, App Engine provides a built-in Google Cloud Storage stream wrapper that allows you to use many of the standard PHP filesystem functions <https://cloud.google.com/appengine/docs/standard/php/googlestorage/advanced#php_filesystem_functions_support_on_google_cloud_storage> to read and write files in an App Engine PHP app. You may read more detail on the "Reading and Writing Files" page <https://cloud.google.com/appengine/docs/standard/php/googlestorage/>. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/4b1c4d8a-fc00-4189-b8d4-4ac076ad032c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
