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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 | * |
| 549 | * The firing of this action does not necessarily mean that the recipient received the |
| 550 | * email successfully. It only means that the `send` method above was able to |
| 551 | * process the request without any errors. |
| 552 | * |
| 553 | * @since 5.9.0 |
| 554 | * |
| 555 | * @param array $mail_data An array containing the mail recipient, subject, message, headers, and attachments. |
| 556 | */ |
| 557 | do_action( 'wp_mail_succeeded', $mail_data ); |
| 558 | |
| 559 | return $send; |
| 560 | } catch ( PHPMailer\PHPMailer\Exception $e ) { |
| 561 | $mail_data['phpmailer_exception_code'] = $e->getCode(); |
| 562 | |
| 563 | /** |
| 564 | * Fires after a PHPMailer\PHPMailer\Exception is caught. |
| 565 | * |
| 566 | * @since 4.4.0 |