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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 |
|---|---|
| 604 | * @type string $message The content of the email. |
| 605 | * @type string $headers Headers. |
| 606 | * } |
| 607 | * @param WP_User $user The site administrator user object. |
| 608 | * @param string $blog_title The site title. |
| 609 | * @param string $blog_url The site URL. |
| 610 | * @param string $password The site administrator's password. Note that a placeholder message |
| 611 | * is usually passed instead of the user's actual password. |
| 612 | */ |
| 613 | $installed_email = apply_filters( 'wp_installed_email', $installed_email, $user, $blog_title, $blog_url, $password ); |
| 614 | |
| 615 | wp_mail( |
| 616 | $installed_email['to'], |
| 617 | $installed_email['subject'], |
| 618 | $installed_email['message'], |
| 619 | $installed_email['headers'] |
| 620 | ); |
| 621 | } |
| 622 | endif; |