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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 |
|---|---|
| 394 | $from_name = apply_filters( 'wp_mail_from_name', $from_name ); |
| 395 | |
| 396 | try { |
| 397 | $phpmailer->setFrom( $from_email, $from_name, false ); |
| 398 | } catch ( PHPMailer\PHPMailer\Exception $e ) { |
| 399 | $mail_error_data = compact( 'to', 'subject', 'message', 'headers', 'attachments' ); |
| 400 | $mail_error_data['phpmailer_exception_code'] = $e->getCode(); |
| 401 | |
| 402 | /** This filter is documented in wp-includes/pluggable.php */ |
| 403 | do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) ); |
| 404 | |
| 405 | return false; |
| 406 | } |
| 407 | |
| 408 | // Set mail's subject and body. |
| 409 | $phpmailer->Subject = $subject; |
| 410 | $phpmailer->Body = $message; |
| 411 | |
| 412 | // Set destination addresses, using appropriate methods for handling addresses. |
| Line | Code |
| 536 | |
| 537 | /** |
| 538 | * Fires after a PHPMailer\PHPMailer\Exception is caught. |
| 539 | * |
| 540 | * @since 4.4.0 |
| 541 | * |
| 542 | * @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array |
| 543 | * containing the mail recipient, subject, message, headers, and attachments. |
| 544 | */ |
| 545 | do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) ); |
| 546 | |
| 547 | return false; |
| 548 | } |
| 549 | } |
| 550 | endif; |
| 551 | |
| 552 | if ( ! function_exists( 'wp_authenticate' ) ) : |
| 553 | /** |
| 554 | * Authenticate a user, confirming the login credentials are valid. |