一个PHP分页类-支持URL普通模式和PATHINFO模式
分页实现是网站应用最常用的功能，需要注意的是，要和网站的url模式相一致，且不丢失其他GET参数。再次就是要可以配置你的分页主题。这里我整理了一个分页类，调用非常简单，demo如下：
场景：写了一个微信精选的文摘，有分页功能，URL模式就是普通模式"?a=bc&page=2",若你的程序是PATHINTO模式的，实例化Page类时配置一下$urlmode=1就可以生成形如"./a/bc/page/2"的URL。分页类首要知道你的总数和每页的个数就可以了。话不多说，直接看代码加注释
应用代码摘取：
require './DMysqli.php';//数据库类
$dbconfig = array('hostname'=>SAE_MYSQL_HOST_M,'username'=>SAE_MYSQL_USER,'password'=>SAE_MYSQL_PASS,'database'=>SAE_MYSQL_DB,'hostport'=>SAE_MYSQL_PORT,'tablePrefix'=>'wx_');
$dmysqli = new DMysqli($dbconfig);
header('Content-type: text/html; charset=utf-8');
require 'Util/page.class.php';//引入Page分页类
$sql = 'select count(*) from wx_article';
$count = $dmysqli->query($sql);//总数
$totalRow = intval(current($count[0]));
$Page = new Page($totalRow,10);//实例化分页类：配置总数、每页个数
$sql = 'select * from wx_article ORDER BY posttime,id desc LIMIT $Page->firstRow'.','.'$Page->listRows';//取出当前页的数据，关键在sql语句的limit语法
$res = $dmysqli->query($sql);
/*
//分页语种自定义
$Page->setConfig('header','items');
$Page->setConfig('prev','Prev Page');
$Page->setConfig('next','Next Page');
$Page->setConfig('first','First Page');
$Page->setConfig('last','Last Page');
$Page->setConfig('theme',' %totalRow% %header% %nowPage%/%totalPage% Page %upPage% %downPage% %first% %prePage% %linkPage% %nextPage% %end%');
*/
$show = $Page->show();//分页类可以生成分页字符串，然后赋值给变量，在模版里输出就好了！
include('template/index.html');
Page类源码如下：
class Page {
// 分页栏每页显示的页数
public $rollPage = 4;
// 页数跳转时要带的参数
public $parameter;
// 当url模式为PATHINFO时，此配置项有效
public $depr = '/';
// 分页URL地址
public $url = '';
// 默认列表每页显示行数
public $listRows = 20;
// 起始行数
public $firstRow;
// 分页总页面数
protected $totalPages;
// 总行数
protected $totalRows;
// 当前页数
protected $nowPage;
// 分页的栏的总页数
protected $coolPages;
// 分页显示定制
protected $config = array (
'header' => '条',
'prev' => '上一页',
'next' => '下一页',
'first' => '第一页',
'last' => '最后一页',
'theme' => ' %totalRow% %header% %nowPage%/%totalPage% 页 %upPage% %downPage% %first% %prePage% %linkPage% %nextPage% %end%'
);
// 默认分页变量名
protected $varPage;
// url模式:0 普通模式 1 PATHINFO模式
protected $urlmode;
/**
* 架构函数
*
* @access public
* @param array $totalRows
* 总的记录数
* @param array $listRows
* 每页显示记录数
* @param array $parameter
* 分页跳转的参数
*
*/
public function __construct($totalRows, $listRows = '', $parameter = '', $url = '', $urlmode = 0) {
$this->totalRows = $totalRows;
$this->parameter = $parameter;
$this->varPage = 'page';
if (! empty ( $listRows )) {
$this->listRows = intval ( $listRows );
}
$this->totalPages = ceil ( $this->totalRows / $this->listRows ); // 总页数
$this->coolPages = ceil ( $this->totalPages / $this->rollPage );
$this->nowPage = ! empty ( $_GET [$this->varPage] ) ? intval ( $_GET [$this->varPage] ) : 1;
if (! empty ( $this->totalPages ) && $this->nowPage > $this->totalPages) {
$this->nowPage = $this->totalPages;
}
$this->firstRow = $this->listRows * ($this->nowPage - 1);
$this->urlmode = $urlmode;
}
public function setConfig($name, $value) {
if (isset ( $this->config [$name] )) {
$this->config [$name] = $value;
}
}
/**
* 分页显示输出
*
* @access public
*
*/
public function show() {
if (0 == $this->totalRows)
return '';
$p = $this->varPage;
$nowCoolPage = ceil ( $this->nowPage / $this->rollPage );
// 分析分页参数
if ($this->parameter && is_string ( $this->parameter )) {
parse_str ( $this->parameter, $parameter );
} elseif (empty ( $this->parameter )) {
// unset($_GET[C('VAR_URL_PARAMS')]);
if (empty ( $_GET )) {
$parameter = array ();
} else {
$parameter = $_GET;
}
}
$parameter [$p] = '__PAGE__';
if ($this->urlmode == 0) { // 普通模式URL转换
$url = "?" . http_build_query ( $parameter );
} else { // PATHINFO模式或者兼容URL模式
$url = ".$this->depr";
if (! empty ( $parameter )) { // 添加参数
foreach ( $parameter as $var => $val ) {
if ('' !== trim ( $val ))
$url .= $var . $this->depr . urlencode ( $val );
}
}
}
// 上下翻页字符串
$upRow = $this->nowPage - 1;
$downRow = $this->nowPage + 1;
if ($upRow > 0) {
$upPage = "<a href='" . str_replace ( '__PAGE__', $upRow, $url ) . "'>" . $this->config ['prev'] . "</a>";
} else {
$upPage = '';
}
if ($downRow <= $this->totalPages) {
$downPage = "<a href='" . str_replace ( '__PAGE__', $downRow, $url ) . "'>" . $this->config ['next'] . "</a>";
} else {
$downPage = '';
}
unset ( $upPage );
unset ( $downPage );
// << < > >>
if ($nowCoolPage == 1) {
$theFirst = '';
$prePage = '';
} else {
$preRow = $this->nowPage - $this->rollPage;
$prePage = "<a href='" . str_replace ( '__PAGE__', $preRow, $url ) . "' >上" . $this->rollPage . "页</a>";
$theFirst = "<a href='" . str_replace ( '__PAGE__', 1, $url ) . "' >" . $this->config ['first'] . "</a>";
}
if ($nowCoolPage == $this->coolPages) {
$nextPage = '';
$theEnd = '';
} else {
$nextRow = $this->nowPage + $this->rollPage;
$theEndRow = $this->totalPages;
$nextPage = "<a href='" . str_replace ( '__PAGE__', $nextRow, $url ) . "' >下" . $this->rollPage . "页</a>";
$theEnd = "<a href='" . str_replace ( '__PAGE__', $theEndRow, $url ) . "' >" . $this->config ['last'] . "</a>";
}
// 1 2 3 4 5
$linkPage = "";
for($i = 1; $i <= $this->rollPage; $i ++) {
$page = ($nowCoolPage - 1) * $this->rollPage + $i;
if ($page != $this->nowPage) {
if ($page <= $this->totalPages) {
$linkPage .= " <a href='" . str_replace ( '__PAGE__', $page, $url ) . "'> " . $page . " </a>";
} else {
break;
}
} else {
if ($this->totalPages != 1) {
$linkPage .= " <span class='current'>" . $page . "</span>";
}
}
}
$pageStr = str_replace ( array (
'%header%',
'%nowPage%',
'%totalRow%',
'%totalPage%',
'%upPage%',
'%downPage%',
'%first%',
'%prePage%',
'%linkPage%',
'%nextPage%',
'%end%'
), array (
$this->config ['header'],
$this->nowPage,
$this->totalRows,
$this->totalPages,
$upPage,
$downPage,
$theFirst,
$prePage,
$linkPage,
$nextPage,
$theEnd
), $this->config ['theme'] );
return $pageStr;
}
}