I need to use my private plugin solely in some pages.
If I take away the add_action perform (‘the_content’, ‘my_plugin_content’); the plugin doesn’t present me the content material of the opposite pages that aren’t in in_array ();

perform my_plugin_content($content material){
  world $put up; world $wp; world $wpdb;
  $web page =array('page1', 'page2','page3');
  $current_page = $wp->request;
  if(in_array($current_page, $web page))
  {
   $old_content=$post->post_content;
   $sql = "UPDATE wp_posts SET post_content = '' WHERE ID = $post->ID";
   $wpdb->get_results($sql);
   include_once(plugin_dir_path( __FILE__ ).'loaders/loaders.php');
   $obj = new Loader;
   $content material.=$obj->controller($current_page);
   $my_post = array(); 
   $my_post['ID'] = $post->ID;
   $my_post['post_content']=$content material;
   wp_update_post($my_post);
 }
}
add_action('the_content', 'my_plugin_content');