is_admin Not working

[ghost]

Describe the bug I have a plugin that relies on is_admin returning true when save_post is fired from the editor screen. The new editor does not seem to return true when is_admin is called after clicking the update button. I have tried a number of work arounds such as this function but it to fails to recognize that it is on the editor screen.

function is_admin_request() {
$current_url = home_url( add_query_arg( null, null ) );
$admin_url = strtolower( admin_url() );
if ( strpos( $current_url, $admin_url ) ) {
return 1;
}

if(wp_doing_ajax()) return 1;

return 0;
}

if(wp_doing_ajax()) return 1;

return 0;
}

To Reproduce
Steps to reproduce the behavior:
call is_admin from server while saving a post.

Expected behavior
is_admin should return true on the editor screen

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
4.1.1

[swissspidy]

Hey there

Since Gutenberg uses the REST API to save posts, you would have to check for that, not is_admin or wp_doing_ajax

[ocean90]

I'm wondering why you have to do that check?

With the introduction of the REST API posts can also be created outside of wp-admin. And as said before, the new editor is using the REST API for all interactions so you have to adjust your plugin for this.