apply_filters( ‘update_welcome_subject’, string $subject )

Filters the subject of the welcome email sent to the site administrator after site activation.

Parameters

$subject = apply_filters( 'update_welcome_subject', sprintf( $subject, $current_network->site_name, wp_unslash( $title ) ) );

Used by	Description
wpmu_welcome_notification()`wp-includes/ms-functions.php`	Notifies the site administrator that their site activation was successful.

Version	Description
MU (3.0.0)	Introduced.

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