WordPress Version: 3.9
/**
* Retrieve or display original referer hidden field for forms.
*
* The input name is '_wp_original_http_referer' and will be either the same
* value of {@link wp_referer_field()}, if that was posted already or it will
* be the current page, if it doesn't exist.
*
* @since 2.0.4
*
* @param bool $echo Whether to echo the original http referer
* @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
* @return string Original referer field.
*/
function wp_original_referer_field($echo = true, $jump_back_to = 'current')
{
if (!$ref = wp_get_original_referer()) {
$ref = ('previous' == $jump_back_to) ? wp_get_referer() : wp_unslash($_SERVER['REQUEST_URI']);
}
$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr($ref) . '" />';
if ($echo) {
echo $orig_referer_field;
}
return $orig_referer_field;
}