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фильтр не описан

wpcf7_special_mail_tags хук-фильтр . CF7 1.0

Использование

add_filter( 'wpcf7_special_mail_tags', 'filter_function_name_9774', 10, 4 );
function filter_function_name_9774( $null, $tag_name, $html, $mail_tag ){
	// filter...

	return $null;
}
$null
-
$tag_name
-
$html
-
$mail_tag
-

Где вызывается хук

WPCF7_MailTaggedText::replace_tags_callback()
wpcf7_special_mail_tags
wpcf7_flamingo_submit()
wpcf7_special_mail_tags
contact-form-7/includes/mail.php 360-362
$special = apply_filters( 'wpcf7_special_mail_tags', null,
	$mail_tag->tag_name(), $html, $mail_tag
);
contact-form-7/modules/flamingo.php 60-62
$meta[$smt] = apply_filters( 'wpcf7_special_mail_tags', null,
	$tagname, false, $mail_tag
);

Где используется хук в ядре Contact Form 7

contact-form-7/includes/mail.php 149
add_filter( 'wpcf7_special_mail_tags', 'wpcf7_site_related_smt', 10, 4 );
contact-form-7/includes/mail.php 191
add_filter( 'wpcf7_special_mail_tags', 'wpcf7_user_related_smt', 10, 4 );
contact-form-7/includes/mail.php 7
add_filter( 'wpcf7_special_mail_tags', 'wpcf7_special_mail_tag', 10, 4 );
contact-form-7/includes/mail.php 82
add_filter( 'wpcf7_special_mail_tags', 'wpcf7_post_related_smt', 10, 4 );
contact-form-7/includes/mail.php 260
add_filter( 'wpcf7_special_mail_tags', 'wpcf7_flamingo_serial_number', 10, 4 );