Method getId

/**
 * Method to get the id used for the field input tag.
 *
 * @param   string  $fieldId    The field element id.
 * @param   string  $fieldName  The field element name.
 *
 * @return  string  The id to be used for the field input tag.
 *
 * @since   1.7.0
 */
protected function getId($fieldId, $fieldName)
{
    $id = '';
    // If there is a form control set for the attached form add it first.
    if ($this->formControl) {
        $id .= $this->formControl;
    }
    // If the field is in a group add the group control to the field id.
    if ($this->group) {
        // If we already have an id segment add the group control as another level.
        if ($id) {
            $id .= '_' . str_replace('.', '_', $this->group);
        } else {
            $id .= str_replace('.', '_', $this->group);
        }
    }
    // If we already have an id segment add the field id/name as another level.
    if ($id) {
        $id .= '_' . ($fieldId ?: $fieldName);
    } else {
        $id .= $fieldId ?: $fieldName;
    }
    // Clean up any invalid characters.
    $id = preg_replace('#\\W#', '_', $id);
    // If this is a repeatable element, add the repeat count to the ID
    if ($this->repeat) {
        $repeatCounter = empty($this->form->repeatCounter) ? 0 : $this->form->repeatCounter;
        $id .= '-' . $repeatCounter;
        if (strtolower($this->type) === 'radio') {
            $id .= '-';
        }
    }
    return $id;
}