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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 |
|---|---|
| 644 | * An array of default site creation variables. |
| 645 | * |
| 646 | * @type string $user_name The user username. |
| 647 | * @type string $user_email The user email address. |
| 648 | * @type string $blogname The blogname. |
| 649 | * @type string $blog_title The title of the site. |
| 650 | * @type WP_Error $errors A WP_Error object with possible errors relevant to new site creation variables. |
| 651 | * } |
| 652 | */ |
| 653 | $filtered_results = apply_filters( 'signup_blog_init', $signup_blog_defaults ); |
| 654 | |
| 655 | $user_name = $filtered_results['user_name']; |
| 656 | $user_email = $filtered_results['user_email']; |
| 657 | $blogname = $filtered_results['blogname']; |
| 658 | $blog_title = $filtered_results['blog_title']; |
| 659 | $errors = $filtered_results['errors']; |
| 660 | |
| 661 | if ( empty($blogname) ) |
| 662 | $blogname = $user_name; |