WordPress custom pagination

custom_pagination.php

<?php

/** Custom Pagination */

function custom_pagination($total_pages, $current_page, $pageByGet = true){

  // Only paginate if we have more than one page
  if ( $total_pages > 1 )  {
    $big = 999999999;
    // Structure of "format" depends on whether we’re using pretty permalinks
    $permalink_structure = '';
    $format = empty( $permalink_structure ) ? '&page=%#%' : 'page/%#%/';
    $pages = paginate_links(array(
      'base' => str_replace( $big, '%#%', get_pagenum_link( $big ) ),
      'format' => $format,
      'current' => $current_page,
      'total' => $total_pages,
      'mid_size' => 2,
      'type' => 'array',
      'prev_next'   => true,
      'prev_text'   => __('◄'),
      'next_text'   => __('►'),
    ));
    $friendlyURL = ( $pageByGet === TRUE ? "?page=" : "page/" );
    $pageLink = "";
    foreach( $pages as $page){
      $pageNum = strip_tags( $page );
      $pagePrev = (int)$current_page - 1;
      $pageNext = (int)$current_page + 1;
      switch( $pageNum ){
        case "&hellip;":
        $pageLink .= "<li><a href='#'>" . $pageNum . "</a></li>";
        break;
        case "►":
        $pageLink .= "<li><a href='" . $friendlyURL . $pageNext . "'>" . $pageNum . "</a></li>";
        break;
        case "◄":
        $pageLink .= "<li><a href='" . $friendlyURL . $pagePrev . "'>" . $pageNum . "</a></li>";
        break;
        default:
        $pageLink .= "<li><a href='" . $friendlyURL . $pageNum . "' class='" . ( $pageNum === $current_page ? "active" : "" ) . "' >" . $pageNum . "</a></li>";
        break;
      }
    }
    return $pageLink;
  }

}

/** END Custom Pagination */

/** For this pagination works in index.php or an static page put this code before args of your query */

if( is_front_page() ){
	$paged = (get_query_var( 'page' )) ? get_query_var( 'page' ) : 1;
}else{
	$paged = (get_query_var( 'paged' )) ? get_query_var( 'paged' ) : 1;
}

/** Remember to put "paged" in args of your query */

//'paged' => $paged,

/** to show pagination only call the function with her args */

custom_pagination($query->max_num_pages, $paged);