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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 |
|---|---|
| 218 | $sitename = strtolower( $_SERVER['SERVER_NAME'] ); |
| 219 | if ( substr( $sitename, 0, 4 ) == 'www.' ) { |
| 220 | $sitename = substr( $sitename, 4 ); |
| 221 | } |
| 222 | |
| 223 | $from_email = 'wordpress@' . $sitename; |
| 224 | } |
| 225 | |
| 226 | // Set the from name and email |
| 227 | $phpmailer->From = apply_filters( 'wp_mail_from', $from_email ); |
| 228 | $phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name ); |
| 229 | |
| 230 | // Set destination address |
| 231 | $phpmailer->AddAddress( $to ); |
| 232 | |
| 233 | // Set mail's subject and body |
| 234 | $phpmailer->Subject = $subject; |
| 235 | $phpmailer->Body = $message; |
| 236 | |