OPTION TREE META BOX FOR SPECIFIC TEMPLATE

<?php

add_action( 'admin_init', 'custom_meta_boxes' );

function custom_meta_boxes() {



/****************META BOX FOR SPECIFIC TEMPLATE START**********************/

ot_register_meta_box( $meta_template_data_box );

  $meta_template_data_box = array(
    'id'          => 'meta_template_data_box',
    'title'       => __( 'Demo Meta Box', 'theme-text-domain' ),
    'desc'        => '',
    'pages'       => array( 'page' ),
    'context'     => 'normal',
    'priority'    => 'high',
    'fields'      => array(

      array(
        'label'       => __( 'Textarea', 'theme-text-domain' ),
        'id'          => 'demo_textarea',
        'type'        => 'textarea',
        'desc'        => __( 'This is a demo Textarea field.', 'theme-text-domain' )
      )

    )
  );

$post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
$template_file = get_post_meta($post_id, '_wp_page_template', TRUE);

if ($template_file == 'about-page.php') {
    ot_register_meta_box( $meta_template_data_box );
}

/****************META BOX FOR SPECIFIC TEMPLATE END**********************/




/****************META BOX FOR SPECIFIC SLIDER CUSTOM POST**********************/
  $slider_meta_box = array(
    'id'          => 'slidername_meta_box',
    'title'       => __( 'Slider title', 'theme-text-domain' ),
    'desc'        => '',
    'pages'       => array( 'slider' ),
    'context'     => 'normal',
    'priority'    => 'high',
    'fields'      => array(
      array(
        'label'       => __( 'Enter your slider title', 'theme-text-domain' ),
        'id'          => 'slider_title',
        'type'        => 'text'
      ),
      array(
        'label'       => __( 'Show your name', 'theme-text-domain' ),
        'id'          => 'name_title',
        'type'        => 'text'
      ),
      array(
        'label'       => __( 'Subtitle', 'theme-text-domain' ),
        'id'          => 'slsub_title',
        'type'        => 'text'
      ),
      array(
        'label'       => __( 'your thumbnail image', 'theme-text-domain' ),
        'id'          => 'postimageurl',
        'type'        => 'text'
      ),

    )
  );

  /**
   * Register our meta boxes using the
   * ot_register_meta_box() function.
   */
  if ( function_exists( 'ot_register_meta_box' ) )
    ot_register_meta_box( $slider_meta_box );

/****************META BOX FOR SPECIFIC SLIDER POST END**********************/



}

?>