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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 |
|---|---|
| 1146 | |
| 1147 | $user = new WP_User($user_id); |
| 1148 | |
| 1149 | $options_site_url = esc_url(network_admin_url('settings.php')); |
| 1150 | $msg = sprintf(__('New User: %1s |
| 1151 | Remote IP: %2s |
| 1152 | |
| 1153 | Disable these notifications: %3s'), $user->user_login, $_SERVER['REMOTE_ADDR'], $options_site_url); |
| 1154 | |
| 1155 | $msg = apply_filters( 'newuser_notify_siteadmin', $msg ); |
| 1156 | wp_mail( $email, sprintf(__('New User Registration: %s'), $user->user_login), $msg ); |
| 1157 | return true; |
| 1158 | } |
| 1159 | |
| 1160 | /** |
| 1161 | * Check whether a blogname is already taken. |
| 1162 | * |
| 1163 | * Used during the new site registration process to ensure |
| 1164 | * that each blogname is unique. |