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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 |
---|---|
400 | $phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset ); |
401 |
|
402 | // Set custom headers |
403 | if ( !empty( $headers ) ) { |
404 | foreach ( $headers as $name => $content ) { |
405 | $phpmailer->AddCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) ); |
406 | } |
407 | } |
408 |
|
409 | do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) ); |
410 |
|
411 | // Send! |
412 | $result = @$phpmailer->Send(); |
413 |
|
414 | return $result; |
415 | } |
416 | endif; |
417 |
|
418 | /** |