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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 |
|---|---|
| 341 | $from_email = apply_filters( 'wp_mail_from', $from_email ); |
| 342 | |
| 343 | /** |
| 344 | * Filters the name to associate with the "from" email address. |
| 345 | * |
| 346 | * @since 2.3.0 |
| 347 | * |
| 348 | * @param string $from_name Name associated with the "from" email address. |
| 349 | */ |
| 350 | $from_name = apply_filters( 'wp_mail_from_name', $from_name ); |
| 351 | |
| 352 | $phpmailer->setFrom( $from_email, $from_name ); |
| 353 | |
| 354 | // Set destination addresses |
| 355 | if ( !is_array( $to ) ) |
| 356 | $to = explode( ',', $to ); |
| 357 | |
| 358 | // Set mail's subject and body |
| 359 | $phpmailer->Subject = $subject; |