paging.php
class
Paging {
private
static
$_Instance
;
private
function
__clone(){}
public
static
function
getInstance() {
if
(
empty
(self::
$_Instance
)) self::
$_Instance
=
new
self();
return
self::
$_Instance
;
}
protected
$count
= 0;
protected
$size
= 0;
protected
$page
= 0;
function
prepare(
$sql
,
$pagesize
=10) {
$page
= isset(
$_GET
['page']) ?
$_GET
['page'] : 1;
$pageon
= (
$page
- 1) *
$pagesize
;
$sql
= preg_replace('/select\s/i', '
$0SQL_CALC_FOUND_ROWS
',
$sql
) .
" limit $pageon, $pagesize"
;
$rs
= mysql_query(
$sql
);
$p
= mysql_query('SELECT FOUND_ROWS()');
list(
$this
->
count
) = mysql_fetch_row(
$p
);
$this
->size =
$pagesize
;
$this
->page =
$page
;
return
$rs
;
}
function
bar(
$tpl
='') {
if
(!
$tpl
)
$tpl
= '共{
count
}页 第{page}页 <a href=?{reset}>首页</a> <a href=?{prve}>上一页</a> <a href=?{next}>下一页</a> <a href=?{
end
}>尾页</a>';
$count
=
ceil
(
$this
->
count
/
$this
->size);
$page
=
$this
->page;
$d
=
array
(
'{reset}' => 1,
'{prve}' =>
$page
> 1 ?
$page
- 1 : 1,
'{next}' =>
$page
<
$count
?
$page
+ 1 :
$count
,
'{
end
}' =>
$count
,
'{
count
}' =>
$count
,
'{page}' =>
$page
,
);
foreach
(
$d
as
$k
=>&
$v
) {
if
(in_array(
$k
,
array
('{reset}', '{prve}', '{next}', '{
end
}'))) {
$_GET
['page'] =
$v
;
$v
= http_build_query(
$_GET
);
}
}
echo
strtr
(
$tpl
,
$d
);
}
}
function
mysql_paging_query(
$sql
,
$num
=10) {
return
Paging::getInstance()->prepare(
$sql
,
$num
);
}
function
mysql_paging_bar(
$tpl
='') {
return
Paging::getInstance()->bar(
$tpl
);
}