Using Gravity Forms ‘gform_secure_file_download_is_https’ PHP filter

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The gform_secure_file_download_is_https filter allows you to override SSL replacement in Gravity Forms. By default, Gravity Forms tries to determine if the URL schema should be overwritten for SSL, which is not ideal for all situations, especially domain mapping. Setting $field_ssl to false will prevent the override.

Usage

Here’s a generic example of how to use the filter:

add_filter('gform_secure_file_download_is_https', 'your_function_name', 10, 3);

function your_function_name($field_ssl, $file_url, $field) {
    // your custom code here
    return $field_ssl;
}

Parameters

  • $field_ssl (bool): Set to true to allow override if needed, or false to disable override. Defaults to true.
  • $file_url (string): The file URL in question.
  • $field (GF_Field_Fileupload): The field object for further context.

More information

See Gravity Forms Docs: gform_secure_file_download_is_https

Place this code in the functions.php file of your active theme.

Examples

Disabling SSL override for a specific domain

In this example, we disable the SSL override for a specific domain:

add_filter('gform_secure_file_download_is_https', 'disable_ssl_override_for_domain', 10, 3);

function disable_ssl_override_for_domain($field_ssl, $file_url, $field) {
    if (strpos($file_url, 'example.com') !== false) {
        return false;
    }
    return $field_ssl;
}

Always disable SSL override

In this example, we always disable the SSL override:

add_filter('gform_secure_file_download_is_https', 'always_disable_ssl_override', 10, 3);

function always_disable_ssl_override($field_ssl, $file_url, $field) {
    return false;
}

Enable SSL override only for images

In this example, we enable the SSL override only for image file uploads:

add_filter('gform_secure_file_download_is_https', 'ssl_override_for_images', 10, 3);

function ssl_override_for_images($field_ssl, $file_url, $field) {
    $image_extensions = array('jpg', 'jpeg', 'png', 'gif');
    $file_extension = pathinfo($file_url, PATHINFO_EXTENSION);
    if (in_array($file_extension, $image_extensions)) {
        return true;
    }
    return $field_ssl;
}

Disable SSL override for specific form

In this example, we disable the SSL override only for a specific form with form ID 5:

add_filter('gform_secure_file_download_is_https', 'ssl_override_for_form', 10, 3);

function ssl_override_for_form($field_ssl, $file_url, $field) {
    if ($field->formId == 5) {
        return false;
    }
    return $field_ssl;
}