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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 406 | $from_name = apply_filters( 'wp_mail_from_name', $from_name ); |
| 407 | |
| 408 | try { |
| 409 | $phpmailer->setFrom( $from_email, $from_name, false ); |
| 410 | } catch ( PHPMailer\PHPMailer\Exception $e ) { |
| 411 | $mail_error_data = compact( 'to', 'subject', 'message', 'headers', 'attachments' ); |
| 412 | $mail_error_data['phpmailer_exception_code'] = $e->getCode(); |
| 413 | |
| 414 | /** This filter is documented in wp-includes/pluggable.php */ |
| 415 | do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) ); |
| 416 | |
| 417 | return false; |
| 418 | } |
| 419 | |
| 420 | // Set mail's subject and body. |
| 421 | $phpmailer->Subject = $subject; |
| 422 | $phpmailer->Body = $message; |
| 423 | |
| 424 | // Set destination addresses, using appropriate methods for handling addresses. |
| Line | Code |
| 573 | |
| 574 | /** |
| 575 | * Fires after a PHPMailer\PHPMailer\Exception is caught. |
| 576 | * |
| 577 | * @since 4.4.0 |
| 578 | * |
| 579 | * @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array |
| 580 | * containing the mail recipient, subject, message, headers, and attachments. |
| 581 | */ |
| 582 | do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_data ) ); |
| 583 | |
| 584 | return false; |
| 585 | } |
| 586 | } |
| 587 | endif; |
| 588 | |
| 589 | if ( ! function_exists( 'wp_authenticate' ) ) : |
| 590 | /** |
| 591 | * Authenticates a user, confirming the login credentials are valid. |