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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 | 
|---|---|
| 600 |            * | 
| 601 |            * @since 3.7.0 | 
| 602 |            * | 
| 603 |            * @param bool   $send        Whether to send the email. Default true. | 
| 604 |            * @param string $type        The type of email to send. Can be one of | 
| 605 |            *                            'success', 'fail', 'critical'. | 
| 606 |            * @param object $core_update The update offer that was attempted. | 
| 607 |            * @param mixed  $result      The result for the core update. Can be WP_Error. | 
| 608 |            */ | 
| 609 |           if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) ) | 
| 610 |                return; | 
| 611 |  | 
| 612 |           switch ( $type ) { | 
| 613 |                case 'success' : // We updated. | 
| 614 |                     /* translators: 1: Site name, 2: WordPress version number. */ | 
| 615 |                     $subject = __( '[%1$s] Your site has updated to WordPress %2$s' ); | 
| 616 |                     break; | 
| 617 |  | 
| 618 |                case 'fail' :   // We tried to update but couldn't. |