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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 |
|---|---|
| 971 | |
| 972 | $subject = apply_filters( 'update_welcome_subject', sprintf(__('New %1$s Site: %2$s'), $current_site->site_name, stripslashes( $title ) ) ); |
| 973 | wp_mail($user->user_email, $subject, $message, $message_headers); |
| 974 | return true; |
| 975 | } |
| 976 | |
| 977 | function wpmu_welcome_user_notification($user_id, $password, $meta = '') { |
| 978 | global $current_site; |
| 979 | |
| 980 | if ( !apply_filters('wpmu_welcome_user_notification', $user_id, $password, $meta) ) |
| 981 | return false; |
| 982 | |
| 983 | $welcome_email = get_site_option( 'welcome_user_email' ); |
| 984 | |
| 985 | $user = new WP_User($user_id); |
| 986 | |
| 987 | $welcome_email = apply_filters( 'update_welcome_user_email', $welcome_email, $user_id, $password, $meta); |
| 988 | $welcome_email = str_replace( 'SITE_NAME', $current_site->site_name, $welcome_email ); |
| 989 | $welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email ); |