Pagination

<?php
include_once 'includes/language.php';//my own translation static class
/**
 * _pn::pagination('index.php?page', 
 *                  $maxpages, //comes from count(filelist)
 *                  $pageno,   //comes from web application 
 *                  PAGEROWS,  //constant
 *                  PAGECOLS,  //constant
 *                  PAGINATION)//constant
 * 
 * define('PAGEROWS', 4);
 * define('PAGECOLS', 3);
 * define('PAGINATION', 6);
 * define('PAGEMAX', 8); //max numbers in pagination
 * 
 * _lang::lang('previous'), uses your own translation class or function
 */
class _pn {
    protected static $_instance = null;
    private static $page, $pages;//never used ...

    public static function instance() {
        if (is_null(static::$_instance)) {
            static::$_instance = new self();
        }
        return static::$_instance;
    }

    public static function static_instance() {
        if (is_null(static::$_instance)) {
            static::$_instance = new static();
        }
        return static::$_instance;
    }

    public static function pagination($path, 
                                      $maxpages, 
                                      $start=1, 
                                      $row=4, 
                                      $column=4, 
                                      $max=6) {
        
        if ($maxpages<$max) {
            $end = $maxpages;
        } elseif ($start<$max) {
            $end = $max;
        } elseif ($maxpages>$max) {
            $end = ($start+$max<=$maxpages)?$start+$max-1:$maxpages;
            $end = ($end==$maxpages)?$end-1:$end;
        } elseif ($maxpages==$max) {
            $end = $max;
        } elseif ($max>$maxpages) {
            $end = $maxpages-1;
        } elseif ($start+$max>$maxpages) {
            $end = $maxpages;
        }
        $page = $start;
        if ($start== $max&&($maxpages<=$max)) {
            $start = 1;
        } elseif ($start+$end <= $max) {
            $start = 1;
        } elseif ($start<$max) {
            $start = 1;
        } elseif ($start+$max>$maxpages) {
            $start = (($maxpages-$start)>=0)?($maxpages-$max):1;
          //$start = $maxpages - $start;  
        } elseif ($maxpages == $max) {
            $start = 1;
        }
        $html =  '<div style="width:100%" class="center">';
            $html .=  '<div class="center">';
                $html .= '<div class="float_left btn">';
                    $html .= '<a class="pagination" href="' . $path . '=previous">' . _lang::lang('previous') . '</a>';
                $html .= '</div>';
                for ($i = $start; $i <= ($end); $i++) {
                    if (($i<=$end)) {
                        $html .= '<div class="float_left btn">';
                            $html .= '<a class="pagination" href="' . $path . '=' . $i . '"> ';
                                $html .= ($page==$i)?'<b>'. $i .'</b>':$i;
                            $html .= '</a>';
                        $html .= '</div>';
                    }
                }
                if (($maxpages!=$max)&&($maxpages>$max)&&($i<$maxpages)&&($maxpages>($end-1))) {
                    $html .= '<div class="float_left empty_btn">';
                        $html .=  ' ... ';//'<a class="pagination" href="' . $path . '=' . $i . '"> ' . $i . '</a>';
                    $html .= '</div>';
                }
                if ($i<=$maxpages) {
                    $html .= '<div class="float_left btn">';
                        $html .= '<a class="pagination" href="' . $path . '=' . $maxpages . '"> ';
                            $html .= ($page==$maxpages)?'<b>' . $maxpages . '</b>':$maxpages; 
                        $html .= '</a>';
                    $html .= '</div>';
                }
                $html .= '<div class="float_left btn">';
                    $html .= '<a class="pagination" href="' . $path . '=next">' . _lang::lang('next') . '</a>';
                $html .= '</div>';
            $html .= '</div>';
        $html .= '</div>';
        return $html;
    }
}
/**
 * Language
    $lang['nl']['previous']     = 'Vorig';
    $lang['nl']['next']         = 'Volgend';
 */
/**
 * Style items
 * .empty_btn {
    background-color: rgba(192,192,192,0.3);
    word-break: normal;
    border: #73AD21 solid thin;
    padding: 6px;
    margin: 1px;
}   
.btn {
    background-color: rgba(192,192,192,0.3);
    word-break: normal;
    border: #73AD21 solid thin;
    padding: 6px;
    margin: 1px;
}   
.btn:hover {
    background-color: #73AD21;
    border: #DDD inset medium;
    color: white;
}
a.pagination {
    color : #73AD21; 
}
a.pagination:hover {
    color : white; 
}
.float_left {
    float:left;
}

 * 
 */
/**
 * Sample piece web application part
 * 
 * if (isset($_GET['page'])) {//do navigation choice  
    //take session values or default
    $page_set=$_GET['page'];
    //$pageno = a_sessions::_SessionGet('page_set');
    (isset($pageno))||$pageno = 1;
    switch ($page_set) {
        case 'previous':
            $pageno = a_sessions::_SessionGet('pageno');
            if ($pageno>1) {
                $pageno=$pageno-1;
            } else {
                $pageno = 1;
            }
            break;
        case 'next':
            $pageno = a_sessions::_SessionGet('pageno');
            (!isset($pageno))&&$pageno = 1;
            $fCount = a_sessions::_SessionGet('maxpages');
            (!isset($fCount))&&$fCount = PAGEMAX;
            if ($pageno+1<=$fCount) {
                $pageno=$pageno+1;
            }
            break;

        default:
            $pageno = $page_set;
            break;
    }
    a_sessions::_SessionSet('pageno', $pageno);

 */
?>