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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 |
|---|---|
| 548 | * An array of default site creation variables. |
| 549 | * |
| 550 | * @type string $user_name The user username. |
| 551 | * @type string $user_email The user email address. |
| 552 | * @type string $blogname The blogname. |
| 553 | * @type string $blog_title The title of the site. |
| 554 | * @type array $errors An array of possible errors relevant to new site creation variables. |
| 555 | * } |
| 556 | */ |
| 557 | $filtered_results = apply_filters( 'signup_blog_init', $signup_blog_defaults ); |
| 558 | |
| 559 | $user_name = $filtered_results['user_name']; |
| 560 | $user_email = $filtered_results['user_email']; |
| 561 | $blogname = $filtered_results['blogname']; |
| 562 | $blog_title = $filtered_results['blog_title']; |
| 563 | $errors = $filtered_results['errors']; |
| 564 | |
| 565 | if ( empty($blogname) ) |
| 566 | $blogname = $user_name; |