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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 |
|---|---|
| 391 | $phpmailer->IsHTML( false ); |
| 392 | } |
| 393 | |
| 394 | // If we don't have a charset from the input headers |
| 395 | if ( !isset( $charset ) ) { |
| 396 | $charset = get_bloginfo( 'charset' ); |
| 397 | } |
| 398 | |
| 399 | // Set the content-type and charset |
| 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 ) ); |