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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 |
|---|---|
| 1236 | $url = get_blogaddress_by_id($blog_id); |
| 1237 | $user = get_userdata( $user_id ); |
| 1238 | |
| 1239 | $welcome_email = str_replace( 'SITE_NAME', $current_site->site_name, $welcome_email ); |
| 1240 | $welcome_email = str_replace( 'BLOG_TITLE', $title, $welcome_email ); |
| 1241 | $welcome_email = str_replace( 'BLOG_URL', $url, $welcome_email ); |
| 1242 | $welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email ); |
| 1243 | $welcome_email = str_replace( 'PASSWORD', $password, $welcome_email ); |
| 1244 | |
| 1245 | $welcome_email = apply_filters( 'update_welcome_email', $welcome_email, $blog_id, $user_id, $password, $title, $meta); |
| 1246 | $admin_email = get_site_option( 'admin_email' ); |
| 1247 | |
| 1248 | if ( $admin_email == '' ) |
| 1249 | $admin_email = 'support@' . $_SERVER['SERVER_NAME']; |
| 1250 | |
| 1251 | $from_name = get_site_option( 'site_name' ) == '' ? 'WordPress' : esc_html( get_site_option( 'site_name' ) ); |
| 1252 | $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n"; |
| 1253 | $message = $welcome_email; |
| 1254 | |