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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 |
---|---|
386 | $sitename = strtolower( $_SERVER['SERVER_NAME'] ); |
387 | if ( substr( $sitename, 0, 4 ) == 'www.' ) { |
388 | $sitename = substr( $sitename, 4 ); |
389 | } |
390 |
|
391 | $from_email = 'wordpress@' . $sitename; |
392 | } |
393 |
|
394 | // Plugin authors can override the potentially troublesome default |
395 | $phpmailer->From = apply_filters( 'wp_mail_from' , $from_email ); |
396 | $phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name ); |
397 |
|
398 | // Set destination addresses |
399 | if ( !is_array( $to ) ) |
400 | $to = explode( ',', $to ); |
401 |
|
402 | foreach ( (array) $to as $recipient ) { |
403 | $phpmailer->AddAddress( trim( $recipient ) ); |
404 | } |