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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 |
|---|---|
| 780 | * The metadata will be serialized prior to storing it in the database. |
| 781 | * |
| 782 | * @since 4.8.0 |
| 783 | * |
| 784 | * @param array $meta Signup meta data. Default empty array. |
| 785 | * @param string $user The user's requested login name. |
| 786 | * @param string $user_email The user's email address. |
| 787 | * @param string $key The user's activation key. |
| 788 | */ |
| 789 | $meta = apply_filters( 'signup_user_meta', $meta, $user, $user_email, $key ); |
| 790 | |
| 791 | $wpdb->insert( $wpdb->signups, array( |
| 792 | 'domain' => '', |
| 793 | 'path' => '', |
| 794 | 'title' => '', |
| 795 | 'user_login' => $user, |
| 796 | 'user_email' => $user_email, |
| 797 | 'registered' => current_time('mysql', true), |
| 798 | 'activation_key' => $key, |