When I call
switch_to_blog() with a blog id, I don’t know whether that blog actually exists. The function returns always
switch_to_blog( PHP_INT_MAX ); $post = get_post( 1 ); restore_current_blog();
This will result in database errors which are exposed to the user. How can I prevent that?
Real world use case
I was the lead developer of Multilingual Press. When a user translates a post, she gets a screen like this:
Now the following can happen:
- She saves the post successfully and continues translating the post.
- Another user, a network admin, deletes the German blog while she is writing.
- She hits save again and gets database errors.
I want to avoid that scenario. How can I check quickly if the target blog exists? I call
switch_to_blog() very often in multiple different classes, so it has to be fast.