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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
1491 | $current_site->site_name = 'WordPress'; |
1492 |
|
1493 | /** |
1494 | * Filter the subject of the welcome email after site activation. |
1495 | * |
1496 | * @since MU |
1497 | * |
1498 | * @param string $subject Subject of the email. |
1499 | */ |
1500 | $subject = apply_filters( 'update_welcome_subject', sprintf( __( 'New %1$s Site: %2$s' ), $current_site->site_name, wp_unslash( $title ) ) ); |
1501 | wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); |
1502 | return true; |
1503 | } |
1504 |
|
1505 | /** |
1506 | * Notify a user that their account activation has been successful. |
1507 | * |
1508 | * Filter 'wpmu_welcome_user_notification' to disable or bypass. |
1509 | * |