The ms_not_installed() WordPress PHP function displays a failure message when a blog’s tables do not exist. It also checks for a missing $wpdb->site table.
Usage
ms_not_installed($domain, $path);
Custom Example:
ms_not_installed('example.com', '/blog/');
Parameters
$domain(string) – The requested domain for the error to reference.$path(string) – The requested path for the error to reference.
More information
See WordPress Developer Resources: ms_not_installed()
Examples
Basic usage
Display a failure message for a missing blog table.
ms_not_installed('mywebsite.com', '/myblog/');
Non-existent subdomain
Display a failure message for a missing blog table on a subdomain.
ms_not_installed('subdomain.mywebsite.com', '/');
Custom path
Display a failure message for a missing blog table with a custom path.
ms_not_installed('mywebsite.com', '/custom/path/');
Subdirectory
Display a failure message for a missing blog table in a subdirectory.
ms_not_installed('mywebsite.com', '/blog/subdirectory/');
Handling error in a function
Create a function to handle the missing blog table error and display a custom message.
function handle_missing_blog($domain, $path) {
ms_not_installed($domain, $path);
echo "The blog at " . $domain . $path . " could not be found.";
}
handle_missing_blog('mywebsite.com', '/missingblog/');