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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 |
|---|---|
| 1804 | * @type string $user_url The user's url. |
| 1805 | * @type string $user_nicename The user's nice name. Defaults to a URL-safe version of user's login |
| 1806 | * @type string $display_name The user's display name. |
| 1807 | * @type string $user_registered MySQL timestamp describing the moment when the user registered. Defaults to |
| 1808 | * the current UTC timestamp. |
| 1809 | * } |
| 1810 | * @param bool $update Whether the user is being updated rather than created. |
| 1811 | * @param int|null $id ID of the user to be updated, or NULL if the user is being created. |
| 1812 | */ |
| 1813 | $data = apply_filters( 'wp_pre_insert_user_data', $data, $update, $update ? (int) $ID : null ); |
| 1814 | |
| 1815 | if ( empty( $data ) || ! is_array( $data ) ) { |
| 1816 | return new WP_Error( 'empty_data', __( 'Not enough data to create this user.' ) ); |
| 1817 | } |
| 1818 | |
| 1819 | if ( $update ) { |
| 1820 | if ( $user_email !== $old_user_data->user_email || $user_pass !== $old_user_data->user_pass ) { |
| 1821 | $data['user_activation_key'] = ''; |
| 1822 | } |