14.12.2009, 22:09
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Постоянный
Регистрация: 05.12.2004
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Т.к. тема не пользовалась спросом, немного изменил её направление, изменения в первом посте. Продолжу:
Класс для постраничного вывода из БД:
PHP код:
<?php
class Paging {
private $page_size = 10;
private $link_padding = 10;
private $page_link_separator = ' ';
private $next_page_text = 'следующая →';
private $prev_page_text = '← предыдущая';
private $result_text_pattern = 'Показано с %s по %s из %s';
private $page_var = 'p';
private $db;
private $q;
private $total_rows;
private $total_pages;
private $cur_page;
public function __construct($db, $q='', $page_var='p')
{
$this->db = $db;
if ($q) $this->set_query($q);
$this->page_var = $page_var;
$this->cur_page = isset($_GET[$this->page_var]) && (int)$_GET[$this->page_var] > 0 ? (int)$_GET[$this->page_var] : 1;
}
public function set_query($q)
{
$this->q = $q;
}
public function set_page_size($page_size)
{
$this->page_size = abs((int)$page_size);
}
public function set_link_padding($padding)
{
$this->link_padding = abs((int)$padding);
}
public function get_page($q='')
{
if ($q) $this->set_query($q);
$r = $this->db->query( $this->query_paging($this->q) );
$this->total_rows = array_pop($this->db->query('SELECT FOUND_ROWS()')->fetch_row());
if ($this->page_size !== 0) $this->total_pages = ceil($this->total_rows/$this->page_size);
if ($this->cur_page > $this->total_pages)
{
$this->cur_page = $this->total_pages;
if ( $this->total_pages > 0 ) $r = $this->db->query( $this->query_paging($this->q) );
}
return $r;
}
public function get_result_text()
{
$start = (($this->cur_page-1) * $this->page_size)+1;
$end = (($start-1+$this->page_size) >= $this->total_rows)? $this->total_rows:($start-1+$this->page_size);
return sprintf($this->result_text_pattern, $start, $end, $this->total_rows);
}
public function get_page_links()
{
if ( !isset($this->total_pages) ) return '';
$page_link_list = array();
$start = $this->cur_page - $this->link_padding;
if ( $start < 1 ) $start = 1;
$end = $this->cur_page + $this->link_padding-1;
if ( $end > $this->total_pages ) $end = $this->total_pages;
if ( $start > 1 ) $page_link_list[] = $this->get_page_link( $start-1, $start - 2 > 0 ? '...' : '' );
for ($i=$start; $i <= $end; $i++) $page_link_list[] = $this->get_page_link( $i );
if ( $end + 1 < $this->total_pages ) $page_link_list[] = $this->get_page_link( $end +1, $end + 2 == $this->total_pages ? '' : '...' );
if ( $end + 1 <= $this->total_pages ) $page_link_list[] = $this->get_page_link( $this->total_pages );
return implode($this->page_link_separator, $page_link_list);
}
public function get_next_page_link()
{
return isset($this->total_pages) && $this->cur_page < $this->total_pages ? $this->get_page_link( $this->cur_page + 1, $this->next_page_text ) : '';
}
public function get_prev_page_link()
{
return isset($this->total_pages) && $this->cur_page > 1 ? $this->get_page_link( $this->cur_page - 1, $this->prev_page_text ) : '';
}
private function get_page_link($page, $text='')
{
if (!$text) $text = $page;
if ($page != $this->cur_page)
{
$reg = '/((&|^)'.$this->page_var.'=)[^&#]*/';
$url = '?'.( preg_match( $reg, $_SERVER['QUERY_STRING'] ) ? preg_replace($reg, '${1}'.$page, $_SERVER['QUERY_STRING']) : ( $_SERVER['QUERY_STRING'] ? $_SERVER['QUERY_STRING'].'&' : '' ).$this->page_var.'='.$page);
return '<a href="'.$url.'">'.$text.'</a>';
}
return '<span>'.$text.'</span>';
}
private function query_paging()
{
$q = $this->q;
if ($this->page_size != 0)
{
//calculate the starting row
$start = ($this->cur_page-1) * $this->page_size;
//insert SQL_CALC_FOUND_ROWS and add the LIMIT
$q = preg_replace('/^SELECT\s+/i', 'SELECT SQL_CALC_FOUND_ROWS ', $this->q)." LIMIT {$start},{$this->page_size}";
}
return $q;
}
}
?>
Ссылки по классу:
https://forum.antichat.ru/showpost.php?p=1739576&postcount=2
http://www.tigir.com/paging.htm |
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