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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 |
|---|---|
| 715 | * An array of default site creation variables. |
| 716 | * |
| 717 | * @type string $user_name The user username. |
| 718 | * @type string $user_email The user email address. |
| 719 | * @type string $blogname The blogname. |
| 720 | * @type string $blog_title The title of the site. |
| 721 | * @type WP_Error $errors A WP_Error object with possible errors relevant to new site creation variables. |
| 722 | * } |
| 723 | */ |
| 724 | $filtered_results = apply_filters( 'signup_blog_init', $signup_blog_defaults ); |
| 725 | |
| 726 | $user_name = $filtered_results['user_name']; |
| 727 | $user_email = $filtered_results['user_email']; |
| 728 | $blogname = $filtered_results['blogname']; |
| 729 | $blog_title = $filtered_results['blog_title']; |
| 730 | $errors = $filtered_results['errors']; |
| 731 | |
| 732 | if ( empty( $blogname ) ) { |
| 733 | $blogname = $user_name; |