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add_filter( 'register_post_type_args', 'rename_registered_post_types', 999, 2 );

function rename_registered_post_types( $args, $post_type ){
    if( 'post' == $post_type ){//your post type to rename
		    $args['rewrite']['slug'] = 'your_custom_slug';
    }
    return $args;
}

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add_filter( 'post_link', 'add_custom_base_to_post_links', 10, 3 );

function add_custom_base_to_post_links( $post_link, $post, $leavename ) {
    if ( 'post' != $post->post_type || 'publish' != $post->post_status ) {
        return $post_link;
    }
    $post_link = str_replace( '/' . $post->post_name . '/', '/your_custom_base/' . $post->post_name . '/', $post_link );
    return $post_link;
}

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remove_filter('get_the_excerpt', 'wp_trim_excerpt');

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add_filter('get_the_excerpt', 'allow_html_in_excerpt');

function allow_html_in_excerpt($text) { // Fakes an excerpt if needed
    global $post;
    if ( '' == $text ) {
        $text = get_the_content('');
        $text = apply_filters('the_content', $text);
        $text = str_replace('\]\]\>', ']]>', $text);
        /*just add all the tags you want to appear in the excerpt --
        be sure there are no white spaces in the string of allowed tags */

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add_filter( 'init', 'custom_registered_taxonomy_admin_labels' );

function custom_registered_taxonomy_admin_labels() {
    global $wp_taxonomies;
    $labels = &$wp_taxonomies['your_taxonomy']->labels;//change to your taxonomy slug
	  $labels->name = 'NAME';
    $labels->singular_name = 'SING_NAME';
    $labels->add_new = 'Add NAME';
    $labels->add_new_item = 'Add NAME';
    $labels->edit_item = 'Edit NAME';

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add_action( 'wp_enqueue_scripts', 'conditionally_enqueue_styles');

function conditionally_enqueue_styles() {
   if ( is_front_page() || !is_archive() ) {    
      wp_enqueue_style('bootstrap', 'https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css');
      wp_enqueue_style('style', get_stylesheet_uri());
      wp_enqueue_script( 'bootstrap-js', 'https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js', array('jquery'), '3.3.4', true );
   }
}

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add_action( 'pre_get_posts', 'remove_post_type_from_front_end_search_results');

function remove_post_type_from_front_end_search_results($query){

    if(is_admin() || !$query->is_main_query()) return;
	
    if($query->is_search()){

        $post_type_to_remove = 'your_post_type';
        $searchable_post_types = get_post_types(array('exclude_from_search' => false));

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add_action( 'template_redirect', 'change_wp_search_url' );

function change_wp_search_url() {
    if ( !empty( $_GET['s'] ) ) {
        wp_redirect( home_url( "/your_page/?your_param=" ) . urlencode( get_query_var( 's' ) ) );
        exit();
    }   
}

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add_action('init', 'make_registered_flat_taxonomies_hierarchical');

function make_registered_flat_taxonomies_hierarchical() {

  // Maintain the built-in rewrite functionality of WordPress tags

  global $wp_rewrite;

  $rewrite =  array(
    'hierarchical'              => false, // Maintains tag permalink structure

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add_action('init','safe_remove_backend_admin_access_for_role');

function safe_remove_backend_admin_access_for_role(){
	if( current_user_can('editor') || current_user_can('administrator') )//Your roles
		return;
  	if( is_admin() && !defined('DOING_AJAX') ){//IMPORTANT! Front end AJAX events are excluded...
      if(isset( $_GET[ 'action'] ) && 'trash' == $_GET[ 'action'])//Perhaps you have a call to some WP Admin Operation that needs whitelisting...
        return;
          wp_redirect( home_url() );
          exit;