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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 |
|---|---|
| 364 | $sitename = strtolower( $_SERVER['SERVER_NAME'] ); |
| 365 | if ( substr( $sitename, 0, 4 ) == 'www.' ) { |
| 366 | $sitename = substr( $sitename, 4 ); |
| 367 | } |
| 368 | |
| 369 | $from_email = 'wordpress@' . $sitename; |
| 370 | } |
| 371 | |
| 372 | // Plugin authors can override the potentially troublesome default |
| 373 | $phpmailer->From = apply_filters( 'wp_mail_from', $from_email ); |
| 374 | $phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name ); |
| 375 | |
| 376 | // Set destination address |
| 377 | $phpmailer->AddAddress( $to ); |
| 378 | |
| 379 | // Set mail's subject and body |
| 380 | $phpmailer->Subject = $subject; |
| 381 | $phpmailer->Body = $message; |
| 382 | |