PHP Pagination

pagination.php

<?php

$iShowPostAmount = isset($_GET['show']) ? (int)$_GET['show'] : 5;
$$iItemLimit     = isset($_GET['page']) ? (int)$_GET['page'] : 1;
$iTotalItems     = (int) getRepliesCount() + 1;
$iAdjacents      = 1;

$iNextPage       = $iCurrentPage + 1;
$iPreviousPage   = $iCurrentPage - 1;
$iPagesCount     = ceil($iTotalItems / $iItemLimit);
$iLastPageM1     = $iPagesCount - 1;

if($iPagesCount > 1)
{
    echo '<ul class="pagination" style="margin:0">';
    
    // Previous page
    if($iCurrentPage > 1) {
        echo '<li><a href="/'. '?page=' . $iPreviousPage . '&show=' . $iShowThreadAmount . '" aria-label="Previous"><span aria-hidden="true">&laquo;</span></a></li>';
    } else {
        echo '<li class="disabled"><a aria-label="Previous"><span aria-hidden="true">&laquo;</span></a></li>';
    }
    // Pager
    if($iPagesCount < 7 + ($iAdjacents * 2)) { //not enough pages to bother breaking it up
        for($iPageCounter = 1; $iPageCounter <= $iPagesCount; $iPageCounter++) {
            if($iPageCounter == $iCurrentPage) {
                echo '<li class="active"><a>' . $iPageCounter . '</a></li>';
            } else {
                echo '<li><a href="/' . '?page=' . $iPageCounter . '&show=' . $iShowThreadAmount . '">' . $iPageCounter . '</a></li>';
            }
        }
    }
    elseif($iPagesCount >= 7 + ($iAdjacents * 2))	//enough pages to hide some
    {
        //close to beginning; only hide later pages
        if($iCurrentPage < 1 + ($iAdjacents * 3))
        {
            for($iPageCounter = 1; $iPageCounter < 4 + ($iAdjacents * 2); $iPageCounter++)
            {
                if($iPageCounter == $iCurrentPage)
                    echo '<li class="active"><a>' . $iPageCounter . '</a></li>';
                else
                    echo '<li><a href="/'. '?page=' . $iPageCounter . '&show=' . $iShowThreadAmount . '">' . $iPageCounter . '</a></li>';
            }
            echo '<li class="disabled"><a>...</a></li>';
            echo '<li><a href="/'. '?page=' . $iLastPageM1 . '&show=' . $iShowThreadAmount . '">' . $iLastPageM1 . '</a></li>';
            echo '<li><a href="/'. '?page=' . $iPagesCount . '&show=' . $iShowThreadAmount . '">' . $iPagesCount . '</a></li>';
        }
        //in middle; hide some front and some back
        elseif($iPagesCount - ($iAdjacents * 2) > $iCurrentPage && $iCurrentPage > ($iAdjacents * 2))
        {
            echo '<li><a href="/'. '?page=1&show=' . $iShowThreadAmount . '">1</a></li>';
            echo '<li><a href="/'. '?page=2&show=' . $iShowThreadAmount . '">2</a></li>';
            echo '<li class="disabled"><a>...</a></li>';
            for($iPageCounter = $iCurrentPage - $iAdjacents; $iPageCounter <= $iCurrentPage + $iAdjacents; $iPageCounter++)
            {
                if($iPageCounter == $iCurrentPage)
                    echo '<li class="active"><a>' . $iPageCounter . '</a></li>';
                else
                    echo '<li><a href="/'. '?page=' . $iPageCounter . '&show=' . $iShowThreadAmount . '">' . $iPageCounter . '</a></li>';
            }
            echo '<li class="disabled"><a>...</a></li>';
            echo '<li><a href="/'. '?page=' . $iLastPageM1 . '&show=' . $iShowThreadAmount . '">' . $iLastPageM1 . '</a></li>';
            echo '<li><a href="/'. '?page=' . $iPagesCount . '&show=' . $iShowThreadAmount . '">' . $iPagesCount . '</a></li>';
        }
        //close to end; only hide early pages
        else
        {
            echo '<li><a href="/'. '?page=1&show=' . $iShowThreadAmount . '">1</a></li>';
            echo '<li><a href="/'. '?page=2&show=' . $iShowThreadAmount . '">2</a></li>';
            echo '<li class="disabled"><a>...</a></li>';
            for ($iPageCounter = $iPagesCount - (1 + ($iAdjacents * 3)); $iPageCounter <= $iPagesCount; $iPageCounter++)
            {
                if($iPageCounter == $iCurrentPage)
                    echo '<li class="active"><a>' . $iPageCounter . '</a></li>';
                else
                    echo '<li><a href="/'. '?page=' . $iPageCounter . '&show=' . $iShowThreadAmount . '">' . $iPageCounter . '</a></li>';
            }
        }
    }
    
    // Next page
    if($iCurrentPage < $iPageCounter - 1)
        echo '<li><a href="/'. '?page=' . $iNextPage . '&show=' . $iShowThreadAmount . '" aria-label="Next"><span aria-hidden="true">&raquo;</span></a></li>';
    else
        echo '<li class="disabled"><a aria-label="Next"><span aria-hidden="true">&raquo;</span></a></li>';
    
    echo '</ul><!-- /.pagination -->';
}