PHP分页类集锦
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2023-09-28 14:44:45
分页类一
复制代码 代码如下:
<?php
/**
分页类
修改:silence
creatdate:2006-5-30
lastmodify:2009-5-31
使用方法
$page = new page ( $result, 20 ); //$result为返回记录集数组 ,20为返回每页条数
$index = $page->getindexbar () . $page->getpageinfo ();
print_r ( $result );
echo \"<br><br>\";
echo \"<center>\".$index.\"</center>\";
*/
class page {
private $mtotalrowsnum = 0; // 总信息行数
private $mcurpagenumber = 1; // 当前所在页
private $mtotalpagesnum = 1; // 总页数
private $mquerystring; // 页面传递的数据(url?后的字符串)
private $mpagerowsnum = 20; // 每页显示行数
private $mindexbarlength = 11; // 索引条的页数
private $mindexbar = ''; // 页码索引条
private $mpageinfo = ''; // 分页信息
// 页码索引条样式
private $mnextbutton = \"<font style=\\"font-family:webdings\\">8</font>\";
private $mprebutton = \"<font style=\\"font-family:webdings\\">7</font>\";
private $mfirstbutton = \"<font style=\\"font-family:webdings\\">9</font>\";
private $mlastbutton = \"<font style=\\"font-family:webdings\\">:</font>\";
private $mcssindexbarcurpage = \"font-weight:bold;color:#ff0000\";
private $mcssindexbarpage = '';
// 分页信息样式
private $mcsspageinfonumfont = 'color:#ff0000';
private $mcsspageinfofont = '';
// 构造方法
public function __construct(&$rsqlquery, $userpagerowsnum = '') {
if (! is_array ( $rsqlquery )) {
$this->setdbpagebreak ( $rsqlquery, $userpagerowsnum );
} else {
$this->setarraypagebreak ( $rsqlquery, $userpagerowsnum );
}
}
// 设置数据库型分页
private function setdbpagebreak(&$rsqlquery, $userpagerowsnum = '') {
$this->setdbtotalrowsnum ( $rsqlquery );
$this->settotalpagesnum ( $userpagerowsnum );
if ($this->mtotalpagesnum > 1) {
$this->setcurpagenumber ();
$this->setsqlquery ( $rsqlquery );
$this->setquerystring ();
$this->setindexbar ();
$this->setpageinfo ();
}
}
// 设置数组型分页
private function setarraypagebreak(&$rarray, $userpagerowsnum = '', $usertotalrowsnum = '') {
$this->setarraytotalrowsnum ( $rarray, $usertotalrowsnum );
$this->settotalpagesnum ( $userpagerowsnum );
if ($this->mtotalpagesnum > 1) {
$this->setcurpagenumber ();
$this->setarray ( $rarray );
$this->setquerystring ();
$this->setindexbar ();
$this->setpageinfo ();
}
}
// 数据库型计算总行数
private function setdbtotalrowsnum($rsqlquery) {
$this->mtotalrowsnum = mysql_num_rows ( mysql_query ( $rsqlquery ) );
}
// 数组型计算总行数
private function setarraytotalrowsnum($array) {
$this->mtotalrowsnum = count ( $array );
}
// 计算总页数
private function settotalpagesnum($userpagerowsnum = '') {
if ($userpagerowsnum) {
$this->mpagerowsnum = $userpagerowsnum;
}
$this->mtotalpagesnum = ( int ) (floor ( ($this->mtotalrowsnum - 1) / $this->mpagerowsnum ) + 1);
}
// 计算当前页数
private function setcurpagenumber() {
if ($_get ['page']) {
$this->mcurpagenumber = $_get ['page'];
}
}
// 修正sql截取语句
private function setsqlquery(&$rsqlquery) {
$start_number = ($this->mcurpagenumber - 1) * $this->mpagerowsnum;
$rsqlquery .= \" limit \" . $start_number . \",\" . $this->mpagerowsnum;
}
// 修正截取后的array
private function setarray(&$rarray) {
$start_number = ($this->mcurpagenumber - 1) * $this->mpagerowsnum;
$rarray = array_slice ( $rarray, $start_number, $this->mpagerowsnum );
}
// 修正 $_get 传递数据
private function setquerystring() {
$query_string = $_server ['query_string'];
if ($query_string == '') {
$this->mquerystring = \"?page=\";
} else {
$this->mquerystring = preg_replace ( \"/&?page=\d+/\", '', $query_string );
$this->mquerystring = \"?\" . $this->mquerystring . \"&page=\";
}
}
// 设置页码索引条
private function getpageindex() {
if ($this->mtotalpagesnum <= $this->mindexbarlength) {
$first_number = 1;
$last_number = $this->mtotalpagesnum;
} else {
$offset = ( int ) floor ( $this->mindexbarlength / 2 );
if (($this->mcurpagenumber - $offset) <= 1) {
$first_number = 1;
} elseif (($this->mcurpagenumber + $offset) > $this->mtotalpagesnum) {
$first_number = $this->mtotalpagesnum - $this->mindexbarlength + 1;
} else {
$first_number = $this->mcurpagenumber - $offset;
}
$last_number = $first_number + $this->mindexbarlength - 1;
}
$last_number;
for($i = $first_number; $i <= $last_number; $i ++) {
if ($this->mcurpagenumber == $i) {
$page_index .= \"<font style='\" . $this->mcssindexbarcurpage . \"'>\" . $i . \"</font> \";
} else {
$page_index .= \" <a href='\" . $this->mquerystring . $i . \"' style='\" . $this->mcssindexbarpage . \"'>\" . $i . \"</a> \";
}
}
return $page_index;
}
// 设置页码索引条
private function setindexbar() {
$this->mindexbar = $this->getnavfirstbutton ();
$this->mindexbar .= $this->getnavprebutton ();
$this->mindexbar .= $this->getpageindex ();
$this->mindexbar .= $this->getnavnextbutton ();
$this->mindexbar .= $this->getnavlastbutton ();
}
// 得到页码索引条 首页按钮
private function getnavfirstbutton() {
return \"<a href='\" . $this->mquerystring . \"1'>\" . $this->mfirstbutton . \"</a> \";
}
// 得到页码索引条 上一页按钮
private function getnavprebutton() {
if ($this->mcurpagenumber > 1) {
$pre_number = $this->mcurpagenumber - 1;
} else {
$pre_number = 1;
}
return \"<a href='\" . $this->mquerystring . $pre_number . \"'>\" . $this->mprebutton . \"</a> \";
}
// 得到页码索引条 下一页按钮
private function getnavnextbutton() {
if ($this->mcurpagenumber < $this->mtotalpagesnum) {
$next_number = $this->mcurpagenumber + 1;
} else {
$next_number = $this->mtotalpagesnum;
}
return \"<a href='\" . $this->mquerystring . $next_number . \"'>\" . $this->mnextbutton . \"</a> \";
}
// 得到页码索引条 末页按钮
private function getnavlastbutton() {
return \"<a href='\" . $this->mquerystring . $this->mtotalpagesnum . \"'>\" . $this->mlastbutton . \"</a> \";
}
// 设置分页信息
private function setpageinfo() {
$this->mpageinfo = \"<font style='\" . $this->mcsspageinfofont . \"'>\";
$this->mpageinfo .= \"共 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mtotalrowsnum . \"</font> 条信息 | \";
$this->mpageinfo .= \"<font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mpagerowsnum . \"</font> 条/页 | \";
$this->mpageinfo .= \"共 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mtotalpagesnum . \"</font> 页 | \";
$this->mpageinfo .= \"第 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mcurpagenumber . \"</font> 页\";
$this->mpageinfo .= \"</font>\";
}
// 取出页码索引条
public function getindexbar() {
return $this->mindexbar;
}
// 取出分页信息
public function getpageinfo() {
return $this->mpageinfo;
}
//释放类
function __destruct() {
}
}
?>
<?php
/*
* created on 2007-6-8
* programmer : alan , msn -
* kebeke.com develop a project php - mysql - apache
* window - preferences - phpeclipse - php - code templates
*/
//为了避免重复包含文件而造成错误,加了判断函数是否存在的条件:
if(!function_exists(pageft)){
//定义函数pageft(),三个参数的含义为:
//$totle:信息总数;
//$displaypg:每页显示信息数,这里设置为默认是20;
//$url:分页导航中的链接,除了加入不同的查询信息“page”外的部分都与这个url相同。
// 默认值本该设为本页url(即$_server["request_uri"]),但设置默认值的右边只能为常量,所以该默认值设为空字符串,在函数内部再设置为本页url。
function pageft($totle,$displaypg=20,$url=''){
//定义几个全局变量:
//$page:当前页码;
//$firstcount:(数据库)查询的起始项;
//$pagenav:页面导航条代码,函数内部并没有将它输出;
//$_server:读取本页url“$_server["request_uri"]”所必须。
global $page,$firstcount,$pagenav,$_server;
//为使函数外部可以访问这里的“$displaypg”,将它也设为全局变量。注意一个变量重新定义为全局变量后,原值被覆盖,所以这里给它重新赋值。
$globals["displaypg"]=$displaypg;
if(!$page) $page=1;
//如果$url使用默认,即空值,则赋值为本页url:
if(!$url){ $url=$_server["request_uri"];}
//url分析:
$parse_url=parse_url($url);
$url_query=$parse_url["query"]; //单独取出url的查询字串
if($url_query){
//因为url中可能包含了页码信息,我们要把它去掉,以便加入新的页码信息。
//这里用到了正则表达式,请参考“php中的正规表达式”
$url_query=ereg_replace("(^|&)page=$page","",$url_query);
//将处理后的url的查询字串替换原来的url的查询字串:
$url=str_replace($parse_url["query"],$url_query,$url);
//在url后加page查询信息,但待赋值:
if($url_query) $url.="&page"; else $url.="page";
}else {
$url.="?page";
}
//页码计算:
$lastpg=ceil($totle/$displaypg); //最后页,也是总页数
$page=min($lastpg,$page);
$prepg=$page-1; //上一页
$nextpg=($page==$lastpg ? 0 : $page+1); //下一页
$firstcount=($page-1)*$displaypg;
//开始分页导航条代码:
$pagenav="显示第 <b>".($totle?($firstcount+1):0)."</b>-<b>".min($firstcount+$displaypg,$totle)."</b> 条记录,共 $totle 条记录";
//如果只有一页则跳出函数:
if($lastpg<=1) return false;
$pagenav.=" <a href='$url=1'>首页</a> ";
if($prepg) $pagenav.=" <a href='$url=$prepg'>前页</a> "; else $pagenav.=" 前页 ";
if($nextpg) $pagenav.=" <a href='$url=$nextpg'>后页</a> "; else $pagenav.=" 后页 ";
$pagenav.=" <a href='$url=$lastpg'>尾页</a> ";
//下拉跳转列表,循环列出所有页码:
$pagenav.=" 到第 <select name='topage' size='1' onchange='window.location=\"$url=\"+this.value'>\n";
for($i=1;$i<=$lastpg;$i++){
if($i==$page) $pagenav.="<option value='$i' selected>$i</option>\n";
else $pagenav.="<option value='$i'>$i</option>\n";
}
$pagenav.="</select> 页,共 $lastpg 页";
}
}
<?php
class page {
private $total; //查询所有的数据总记录数
private $page; //当前第几页
private $num; //每页显示记录的条数
private $pagenum; //一共多少页
private $offset; //从数据库中取记录的开始偏移数
function __construct($total, $page=1, $num=5) {
$this->total=$total;
$this->page=$page;
$this->num=$num;
$this->pagenum=$this->getpagenum();
$this->offset=$this->getoffset();
}
private function getpagenum(){
return ceil($this->total/$this->num);
}
private function getnextpage() {
if($this->page==$this->pagenum)
return false;
else
return $this->page+1;
}
private function getprevpage() {
if($this->page==1)
return false;
else
return $this->page-1;
}
//数据库查询的偏移量
private function getoffset() {
return ($this->page-1)*$this->num;
}
//当前页开始的记录数
private function getstartnum() {
if($this->total==0)
return 0;
else
return $this->offset+1;
}
//当前页结束的记录数
private function getendnum() {
return min($this->offset+$this->num,$this->total);
}
public function getpageinfo(){
$pageinfo=array(
"row_total" => $this->total,
"row_num" => $this->num,
"page_num" => $this->getpagenum(),
"current_page" => $this->page,
"row_offset" => $this->getoffset(),
"next_page" => $this->getnextpage(),
"prev_page" => $this->getprevpage(),
"page_start" => $this->getstartnum(),
"page_end" => $this->getendnum()
);
return $pageinfo;
}
}
?>
分页类一
复制代码 代码如下:
<?php
/**
分页类
修改:silence
creatdate:2006-5-30
lastmodify:2009-5-31
使用方法
$page = new page ( $result, 20 ); //$result为返回记录集数组 ,20为返回每页条数
$index = $page->getindexbar () . $page->getpageinfo ();
print_r ( $result );
echo \"<br><br>\";
echo \"<center>\".$index.\"</center>\";
*/
class page {
private $mtotalrowsnum = 0; // 总信息行数
private $mcurpagenumber = 1; // 当前所在页
private $mtotalpagesnum = 1; // 总页数
private $mquerystring; // 页面传递的数据(url?后的字符串)
private $mpagerowsnum = 20; // 每页显示行数
private $mindexbarlength = 11; // 索引条的页数
private $mindexbar = ''; // 页码索引条
private $mpageinfo = ''; // 分页信息
// 页码索引条样式
private $mnextbutton = \"<font style=\\"font-family:webdings\\">8</font>\";
private $mprebutton = \"<font style=\\"font-family:webdings\\">7</font>\";
private $mfirstbutton = \"<font style=\\"font-family:webdings\\">9</font>\";
private $mlastbutton = \"<font style=\\"font-family:webdings\\">:</font>\";
private $mcssindexbarcurpage = \"font-weight:bold;color:#ff0000\";
private $mcssindexbarpage = '';
// 分页信息样式
private $mcsspageinfonumfont = 'color:#ff0000';
private $mcsspageinfofont = '';
// 构造方法
public function __construct(&$rsqlquery, $userpagerowsnum = '') {
if (! is_array ( $rsqlquery )) {
$this->setdbpagebreak ( $rsqlquery, $userpagerowsnum );
} else {
$this->setarraypagebreak ( $rsqlquery, $userpagerowsnum );
}
}
// 设置数据库型分页
private function setdbpagebreak(&$rsqlquery, $userpagerowsnum = '') {
$this->setdbtotalrowsnum ( $rsqlquery );
$this->settotalpagesnum ( $userpagerowsnum );
if ($this->mtotalpagesnum > 1) {
$this->setcurpagenumber ();
$this->setsqlquery ( $rsqlquery );
$this->setquerystring ();
$this->setindexbar ();
$this->setpageinfo ();
}
}
// 设置数组型分页
private function setarraypagebreak(&$rarray, $userpagerowsnum = '', $usertotalrowsnum = '') {
$this->setarraytotalrowsnum ( $rarray, $usertotalrowsnum );
$this->settotalpagesnum ( $userpagerowsnum );
if ($this->mtotalpagesnum > 1) {
$this->setcurpagenumber ();
$this->setarray ( $rarray );
$this->setquerystring ();
$this->setindexbar ();
$this->setpageinfo ();
}
}
// 数据库型计算总行数
private function setdbtotalrowsnum($rsqlquery) {
$this->mtotalrowsnum = mysql_num_rows ( mysql_query ( $rsqlquery ) );
}
// 数组型计算总行数
private function setarraytotalrowsnum($array) {
$this->mtotalrowsnum = count ( $array );
}
// 计算总页数
private function settotalpagesnum($userpagerowsnum = '') {
if ($userpagerowsnum) {
$this->mpagerowsnum = $userpagerowsnum;
}
$this->mtotalpagesnum = ( int ) (floor ( ($this->mtotalrowsnum - 1) / $this->mpagerowsnum ) + 1);
}
// 计算当前页数
private function setcurpagenumber() {
if ($_get ['page']) {
$this->mcurpagenumber = $_get ['page'];
}
}
// 修正sql截取语句
private function setsqlquery(&$rsqlquery) {
$start_number = ($this->mcurpagenumber - 1) * $this->mpagerowsnum;
$rsqlquery .= \" limit \" . $start_number . \",\" . $this->mpagerowsnum;
}
// 修正截取后的array
private function setarray(&$rarray) {
$start_number = ($this->mcurpagenumber - 1) * $this->mpagerowsnum;
$rarray = array_slice ( $rarray, $start_number, $this->mpagerowsnum );
}
// 修正 $_get 传递数据
private function setquerystring() {
$query_string = $_server ['query_string'];
if ($query_string == '') {
$this->mquerystring = \"?page=\";
} else {
$this->mquerystring = preg_replace ( \"/&?page=\d+/\", '', $query_string );
$this->mquerystring = \"?\" . $this->mquerystring . \"&page=\";
}
}
// 设置页码索引条
private function getpageindex() {
if ($this->mtotalpagesnum <= $this->mindexbarlength) {
$first_number = 1;
$last_number = $this->mtotalpagesnum;
} else {
$offset = ( int ) floor ( $this->mindexbarlength / 2 );
if (($this->mcurpagenumber - $offset) <= 1) {
$first_number = 1;
} elseif (($this->mcurpagenumber + $offset) > $this->mtotalpagesnum) {
$first_number = $this->mtotalpagesnum - $this->mindexbarlength + 1;
} else {
$first_number = $this->mcurpagenumber - $offset;
}
$last_number = $first_number + $this->mindexbarlength - 1;
}
$last_number;
for($i = $first_number; $i <= $last_number; $i ++) {
if ($this->mcurpagenumber == $i) {
$page_index .= \"<font style='\" . $this->mcssindexbarcurpage . \"'>\" . $i . \"</font> \";
} else {
$page_index .= \" <a href='\" . $this->mquerystring . $i . \"' style='\" . $this->mcssindexbarpage . \"'>\" . $i . \"</a> \";
}
}
return $page_index;
}
// 设置页码索引条
private function setindexbar() {
$this->mindexbar = $this->getnavfirstbutton ();
$this->mindexbar .= $this->getnavprebutton ();
$this->mindexbar .= $this->getpageindex ();
$this->mindexbar .= $this->getnavnextbutton ();
$this->mindexbar .= $this->getnavlastbutton ();
}
// 得到页码索引条 首页按钮
private function getnavfirstbutton() {
return \"<a href='\" . $this->mquerystring . \"1'>\" . $this->mfirstbutton . \"</a> \";
}
// 得到页码索引条 上一页按钮
private function getnavprebutton() {
if ($this->mcurpagenumber > 1) {
$pre_number = $this->mcurpagenumber - 1;
} else {
$pre_number = 1;
}
return \"<a href='\" . $this->mquerystring . $pre_number . \"'>\" . $this->mprebutton . \"</a> \";
}
// 得到页码索引条 下一页按钮
private function getnavnextbutton() {
if ($this->mcurpagenumber < $this->mtotalpagesnum) {
$next_number = $this->mcurpagenumber + 1;
} else {
$next_number = $this->mtotalpagesnum;
}
return \"<a href='\" . $this->mquerystring . $next_number . \"'>\" . $this->mnextbutton . \"</a> \";
}
// 得到页码索引条 末页按钮
private function getnavlastbutton() {
return \"<a href='\" . $this->mquerystring . $this->mtotalpagesnum . \"'>\" . $this->mlastbutton . \"</a> \";
}
// 设置分页信息
private function setpageinfo() {
$this->mpageinfo = \"<font style='\" . $this->mcsspageinfofont . \"'>\";
$this->mpageinfo .= \"共 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mtotalrowsnum . \"</font> 条信息 | \";
$this->mpageinfo .= \"<font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mpagerowsnum . \"</font> 条/页 | \";
$this->mpageinfo .= \"共 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mtotalpagesnum . \"</font> 页 | \";
$this->mpageinfo .= \"第 <font style='\" . $this->mcsspageinfonumfont . \"'>\" . $this->mcurpagenumber . \"</font> 页\";
$this->mpageinfo .= \"</font>\";
}
// 取出页码索引条
public function getindexbar() {
return $this->mindexbar;
}
// 取出分页信息
public function getpageinfo() {
return $this->mpageinfo;
}
//释放类
function __destruct() {
}
}
?>
分页类二
复制代码 代码如下:
<?php
/*
* created on 2007-6-8
* programmer : alan , msn -
* kebeke.com develop a project php - mysql - apache
* window - preferences - phpeclipse - php - code templates
*/
//为了避免重复包含文件而造成错误,加了判断函数是否存在的条件:
if(!function_exists(pageft)){
//定义函数pageft(),三个参数的含义为:
//$totle:信息总数;
//$displaypg:每页显示信息数,这里设置为默认是20;
//$url:分页导航中的链接,除了加入不同的查询信息“page”外的部分都与这个url相同。
// 默认值本该设为本页url(即$_server["request_uri"]),但设置默认值的右边只能为常量,所以该默认值设为空字符串,在函数内部再设置为本页url。
function pageft($totle,$displaypg=20,$url=''){
//定义几个全局变量:
//$page:当前页码;
//$firstcount:(数据库)查询的起始项;
//$pagenav:页面导航条代码,函数内部并没有将它输出;
//$_server:读取本页url“$_server["request_uri"]”所必须。
global $page,$firstcount,$pagenav,$_server;
//为使函数外部可以访问这里的“$displaypg”,将它也设为全局变量。注意一个变量重新定义为全局变量后,原值被覆盖,所以这里给它重新赋值。
$globals["displaypg"]=$displaypg;
if(!$page) $page=1;
//如果$url使用默认,即空值,则赋值为本页url:
if(!$url){ $url=$_server["request_uri"];}
//url分析:
$parse_url=parse_url($url);
$url_query=$parse_url["query"]; //单独取出url的查询字串
if($url_query){
//因为url中可能包含了页码信息,我们要把它去掉,以便加入新的页码信息。
//这里用到了正则表达式,请参考“php中的正规表达式”
$url_query=ereg_replace("(^|&)page=$page","",$url_query);
//将处理后的url的查询字串替换原来的url的查询字串:
$url=str_replace($parse_url["query"],$url_query,$url);
//在url后加page查询信息,但待赋值:
if($url_query) $url.="&page"; else $url.="page";
}else {
$url.="?page";
}
//页码计算:
$lastpg=ceil($totle/$displaypg); //最后页,也是总页数
$page=min($lastpg,$page);
$prepg=$page-1; //上一页
$nextpg=($page==$lastpg ? 0 : $page+1); //下一页
$firstcount=($page-1)*$displaypg;
//开始分页导航条代码:
$pagenav="显示第 <b>".($totle?($firstcount+1):0)."</b>-<b>".min($firstcount+$displaypg,$totle)."</b> 条记录,共 $totle 条记录";
//如果只有一页则跳出函数:
if($lastpg<=1) return false;
$pagenav.=" <a href='$url=1'>首页</a> ";
if($prepg) $pagenav.=" <a href='$url=$prepg'>前页</a> "; else $pagenav.=" 前页 ";
if($nextpg) $pagenav.=" <a href='$url=$nextpg'>后页</a> "; else $pagenav.=" 后页 ";
$pagenav.=" <a href='$url=$lastpg'>尾页</a> ";
//下拉跳转列表,循环列出所有页码:
$pagenav.=" 到第 <select name='topage' size='1' onchange='window.location=\"$url=\"+this.value'>\n";
for($i=1;$i<=$lastpg;$i++){
if($i==$page) $pagenav.="<option value='$i' selected>$i</option>\n";
else $pagenav.="<option value='$i'>$i</option>\n";
}
$pagenav.="</select> 页,共 $lastpg 页";
}
}
//-------------------------具体演示举例-------------------------------
/*
//(前面程序略)
include("pageft.php"); //包含“pageft.php”文件
//取得总信息数
$result=mysql_query("select * from mytable");
$total=mysql_num_rows($result);
//调用pageft(),每页显示10条信息(使用默认的20时,可以省略此参数),使用本页url(默认,所以省略掉)。
pageft($total,10);
//现在产生的全局变量就派上用场了:
$result=mysql_query("select * from mytable limit $firstcount,$displaypg ");
while($row=mysql_fetch_array($result)){
//(列表内容略)
}
//输出分页导航条代码:
echo $pagenav;
//(后面程序略)
*/
?>
分页类系列之三
复制代码 代码如下:
<?php
class page {
private $total; //查询所有的数据总记录数
private $page; //当前第几页
private $num; //每页显示记录的条数
private $pagenum; //一共多少页
private $offset; //从数据库中取记录的开始偏移数
function __construct($total, $page=1, $num=5) {
$this->total=$total;
$this->page=$page;
$this->num=$num;
$this->pagenum=$this->getpagenum();
$this->offset=$this->getoffset();
}
private function getpagenum(){
return ceil($this->total/$this->num);
}
private function getnextpage() {
if($this->page==$this->pagenum)
return false;
else
return $this->page+1;
}
private function getprevpage() {
if($this->page==1)
return false;
else
return $this->page-1;
}
//数据库查询的偏移量
private function getoffset() {
return ($this->page-1)*$this->num;
}
//当前页开始的记录数
private function getstartnum() {
if($this->total==0)
return 0;
else
return $this->offset+1;
}
//当前页结束的记录数
private function getendnum() {
return min($this->offset+$this->num,$this->total);
}
public function getpageinfo(){
$pageinfo=array(
"row_total" => $this->total,
"row_num" => $this->num,
"page_num" => $this->getpagenum(),
"current_page" => $this->page,
"row_offset" => $this->getoffset(),
"next_page" => $this->getnextpage(),
"prev_page" => $this->getprevpage(),
"page_start" => $this->getstartnum(),
"page_end" => $this->getendnum()
);
return $pageinfo;
}
}
?>
3种分页类使用起来效率都不错,也都很简单,这里推荐给大家。
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