Revolution Slider - Option Tree

ot_revolution_slider

/**
 * Revolution Slider option type.
 *
 * See @ot_display_by_type to see the full list of available arguments.
 *
 * @param     array     An array of arguments.
 * @return    string
 *
 * @access    public
 * @since     2.0
 */
if ( ! function_exists( 'ot_type_revolution_slider' ) ) {
  
  function ot_type_revolution_slider( $args = array() ) {
    
    /* turns arguments array into variables */
    extract( $args );
    
    /* verify a description */
    $has_desc = $field_desc ? true : false;
    
    /* format setting outer wrapper */
    echo '<div class="format-setting type-select ' . ( $has_desc ? 'has-desc' : 'no-desc' ) . '">';
      
      /* description */
      echo $has_desc ? '<div class="description">' . htmlspecialchars_decode( $field_desc ) . '</div>' : '';
      
      /* format setting inner wrapper */
      echo '<div class="format-setting-inner">';
      
        /* build select */
        echo '<select name="' . esc_attr( $field_name ) . '" id="' . esc_attr( $field_id ) . '" class="option-tree-ui-select ' . esc_attr( $field_class ) . '">';

        echo '<option value="">-- Select Slider --</option>';

        global $wpdb;

        // Query wp_revslider_sliders table to get alias's
        $revolution_sliders = $wpdb->get_results("SELECT alias FROM wp_revslider_sliders");

        // Loop through object to display alias's
        foreach($revolution_sliders as $slider){
           echo '<option value="'.esc_attr($slider->alias).'" '.selected( $field_value, $slider->alias, false ).'>'.$slider->alias.'</option>';
        }

        echo '</select>';
        
      echo '</div>';
    
    echo '</div>';
    
  }
  
}