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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 |
|---|---|
| 826 | * The metadata will be serialized prior to storing it in the database. |
| 827 | * |
| 828 | * @since 4.8.0 |
| 829 | * |
| 830 | * @param array $meta Signup meta data. Default empty array. |
| 831 | * @param string $user The user's requested login name. |
| 832 | * @param string $user_email The user's email address. |
| 833 | * @param string $key The user's activation key. |
| 834 | */ |
| 835 | $meta = apply_filters( 'signup_user_meta', $meta, $user, $user_email, $key ); |
| 836 | |
| 837 | $wpdb->insert( |
| 838 | $wpdb->signups, |
| 839 | array( |
| 840 | 'domain' => '', |
| 841 | 'path' => '', |
| 842 | 'title' => '', |
| 843 | 'user_login' => $user, |
| 844 | 'user_email' => $user_email, |