哪位帮忙看下这个分页类怎么调用,我说的是在查询语句下
网上找到一个比较好看的分页类,尽管作者已经说明怎么调用了,但是对我来说还是不太明白,主要是在sql语句里面怎么调用,下面是分页类代码:
<br /><?php<br />/**<br /> * 可以灵活定制的分页类<br /> * <br /> * 可以定制的选项包括,分页链接显示效果,当前页码链接按钮的样式,URL中获取分页值的名字,可以随意带自己的参数<br /> * <br /> * 使用方法:<br /> * 1、初始化类的时候需要传入参数,类型为数组。<br /> * array(<br /> * (必填)'totalRows'=>'100', 需要显示的数据的总条数;<br /> * (必填)'pageSize'=>'2', 每页需要显示的代码数量;<br /> * (必填)'currentPage'=>$_GET['p'], 当前页码,默认可以通过$_GET['p']获取,其中名字p可以定制<br /> * (必填)'baseUrl'=>'/welcome?id=3',你当前页面的链接地址,比如为http://www.xxx.com/test.php(或者/test.php),如果后面带有参数则可以为http://www.xxx.com/test?id=8<br /> * (选填,默认为3)'offset'=>'3', 当前页码的左右偏移量,比如当前页码为5,则在5的左右各显示几个数字链接,默认为3个,则效果为2,3,4,5,6,7,8<br /> * (选填,默认为p)'pageString'=>'p',通过$_GET['p']获取当前页码时候的名字,默认为p<br /> * (选填,默认为here)'className'=>'here',当前页码链接按钮的样式,默认样式名为here,所以你可以这样写css样式.here{background:#FF4500;} )<br /> * <br /> * 2、可以使用的方法。<br /> * A、初始化类后,需要调用pagination([$style = '1'][,$output=TRUE])方法产生分页链接<br /> * 关于参数的说明:<br /> * @param $style (默认为 1,可不填写) :获取链接全部组件,即 首页+上一页+数字链接+下一页+尾页<br /> * @param $style == 2 :仅获取数字链接<br /> * @param $style == 3 :仅获取上一页+下一页<br /> * @param $style == 4 :仅获取上一页+数字链接+下一页,(不包含首尾页)<br /> * <br /> * @param $output (默认为TRUE),返回分页链接<br /> * @param $output 为FALSE时,直接输出分页链接<br /> * <br /> * B、getCurrentPage()获取当前页码,经过真伪判断后的,防止用户自行输入错误,比如http://www.xxx.com/test?p=-100;此时通过此方法获取当前页码为1<br /> * <br /> * C、pageAmount()获取总的页码数量<br /> * <br /> * @author 星空幻颖<br /> * @link http://blog.sina.com.cn/yanyinghq<br /> *<br /> */<br />class Page<br />{<br /> private $pageSize; //您的网站每一页显示的列表条数<br /> private $totalRows; //通过数据库查询返回的总的记录条数<br /> private $url; //基准URL<br /> private $pageAmount; //页码的总数<br /> private $currentPage; //当前的页码<br /> private $offset = 4; //页码偏移量<br /> private $pageString = 'p'; //页码在URL中的名字<br /> private $classHere = 'class="here"'; //当前页链接的class样式类名,默认为here<br /> <br /> //初始化当前页码,记录总条数,每页多少条记录<br /> public function __construct($param)<br /> {<br /> $this->pageSize = $param['pageSize'];<br /> $this->totalRows = $param['totalRows'];<br /> $this->url = $param['baseUrl'];<br /> $this->offset = !empty($param['offset'])?$param['offset']:$this->offset;<br /> $this->pageString = !empty($param['pageString'])?$param['pageString']:$this->pageString;<br /> $this->classHere = !empty($param['className'])?$param['className']:$this->classHere;<br /> $this->currentPage = (int)$param['currentPage'];<br /> }<br /> <br /> /**<br /> * 创建分页链接<br /> * <br /> * @param $style 默认为 1 :获取链接全部组件<br /> * @param $style == 2 :仅获取数字链接<br /> * @param $style == 3 :仅获取上一页,下一页<br /> * @param $style == 4 :仅获取上一页、下一页、数字链接,不包含首尾页<br /> * <br /> * @param $output 为TRUE时,返回分页链接<br /> * @param $output 为FALSE时,直接输出分页链接<br /> * <br /> */<br /> public function pagination($style = '1',$output=TRUE)<br /> {<br /> $this->baseUrl();<br /> $this->pageAmount();<br /> $this->currentPage();<br /> <br /> //获取全部组件<br /> if($style == '1')<br /> {<br /> $page = $this->indexPage().$this->prevPage().$this->pageNumber().$this->nextPage().$this->endPage();<br /> }<br /> else if($style == '2')<br /> {<br /> //获取纯数字链接<br /> $page = $this->pageNumber();<br /> }<br /> else if($style == '3')<br /> {<br /> //只获取上一页下一页<br /> $page = $this->prevPage().$this->nextPage();<br /> }<br /> else if($style =='4')<br /> {<br /> //上一页、下一页、数字链接<br /> $page = $this->prevPage().$this->pageNumber().$this->nextPage();<br /> }<br /> <br /> if($output)<br /> {<br /> return $page;<br /> }<br /> else<br /> {<br /> echo $page;<br /> }<br /> }<br /> <br /> /**<br /> * 获取当前页码<br /> * <br /> * @return 当前页码,经过真伪判断的<br /> */<br /> public function getCurrentPage()<br /> {<br /> $this->pageAmount();<br /> $this->currentPage();<br /> return $this->currentPage;<br /> }<br /> <br /> /**<br /> * 计算出所有的页数<br /> * <br /> * 可以类外面直接调用此方法返回页码总数<br /> * <br /> * @return 页码的总数<br /> */<br /> public function pageAmount()<br /> {<br /> $this->pageAmount = ceil( $this->totalRows / $this->pageSize);<br /> if($this->pageAmount <= 0)<br /> {<br /> $this->pageAmount = '1';<br /> }<br /> return $this->pageAmount;<br /> }<br /> <br /> /**<br /> * 判断基准链接是否携带参数<br /> * <br /> * 基准链接为用户提交当前页码链接<br /> * <br /> * 如果携带参数,则在链接之后加&p=<br /> * <br /> * 如果不携带参数,则直接加?p=<br /> */<br /> private function baseUrl()<br /> {<br /> if(preg_match('/\?/', $this->url))<br /> {<br /> $this->url = $this->url.'&'.$this->pageString.'=';<br /> }<br /> else<br /> {<br /> $this->url = $this->url.'?'.$this->pageString.'=';<br /> }<br /> }<br /> <br /> /**<br /> * 验证当前页码的真伪性<br /> * <br /> * 如果当前页码小于1或者没有,则默认当前页码为1<br /> * <br /> * 如果当前页码大于页码总数,则默认当前页码为页码总数<br /> * <br /> */<br /> private function currentPage()<br /> {<br /> if($this->currentPage < 1 || !$this->currentPage)<br /> {<br /> $this->currentPage = 1;<br /> }<br /> else if(($this->currentPage > $this->pageAmount))<br /> {<br /> $this->currentPage = $this->pageAmount;<br /> }<br /> }<br /> <br /> /**<br /> * 首页链接<br /> */<br /> private function indexPage()<br /> {<br /> if($this->currentPage == 1) return;<br /> return '<a href="'.$this->url.'1">首页</a>';<br /> }<br /> <br /> /**<br /> * 尾页链接<br /> */<br /> private function endPage()<br /> {<br /> if($this->currentPage == $this->pageAmount) return;<br /> return '<a href="'.$this->url.$this->pageAmount.'">尾页</a>';<br /> }<br /> <br /> /**<br /> * 上一页<br /> */<br /> private function prevPage()<br /> {<br /> if($this->currentPage == 1) return;<br /> return '<a href="'.$this->url.( $this->currentPage - 1 ).'">上一页</a>';<br /> }<br /> <br /> /**<br /> * 下一页<br /> */<br /> private function nextPage()<br /> {<br /> if($this->currentPage == $this->pageAmount) return;<br /> return '<a href="'.$this->url.( $this->currentPage + 1 ).'">下一页</a>';<br /> }<br /> <br /> /**<br /> * 中间页码的链接<br /> * <br /> */<br /> private function pageNumber()<br /> {<br /> $left ="";<br /> $right = "";<br /> <br /> //如果总记录的条数“大于”所有链接的数量时候<br /> if($this->pageAmount > ($this->offset * 2 + 1))<br /> {<br /> //当前页码距离首页的距离<br /> $leftNum = $this->currentPage - 1;<br /> <br /> //当前页码距离尾页的距离<br /> $rightNum = $this->pageAmount - $this->currentPage;<br /> <br /> //当当前页码距离首页距离不足偏移量offset时候,在右边补齐缺少的小方块<br /> if( $leftNum < $this->offset)<br /> {<br /> //左边的链接<br /> for($i = $leftNum; $i >= 1 ; $i--)<br /> {<br /> $left .= '<a href="'.$this->url.( $this->currentPage - $i ).'">'.( $this->currentPage - $i ).'</a>';<br /> }<br /> <br /> //右边的链接<br /> for($j = 1; $j <= ($this->offset * 2 - $leftNum); $j++)<br /> {<br /> $right .= '<a href="'.$this->url.( $this->currentPage + $j ).'">'.( $this->currentPage + $j ).'</a>';<br /> }<br /> }<br /> else if($rightNum < $this->offset)<br /> {<br /> //左边的链接<br /> for($i = ($this->offset * 2 - $rightNum); $i >= 1 ; $i--)<br /> {<br /> $left .= '<a href="'.$this->url.( $this->currentPage - $i ).'">'.( $this->currentPage - $i ).'</a>';<br /> }<br /> <br /> //右边的链接<br /> for($j = 1; $j <= $rightNum; $j++)<br /> {<br /> $right .= '<a href="'.$this->url.( $this->currentPage + $j ).'">'.( $this->currentPage + $j ).'</a>';<br /> }<br /> }<br /> else<br /> {<br /> //当前链接左边的链接<br /> for($i = $this->offset; $i >= 1 ; $i--)<br /> {<br /> $left .= '<a href="'.$this->url.( $this->currentPage - $i ).'">'.( $this->currentPage - $i ).'</a>'; <br /> }<br /> <br /> //当前链接右边的链接<br /> for($j = 1; $j <= $this->offset; $j++)<br /> {<br /> $right .= '<a href="'.$this->url.( $this->currentPage + $j ).'">'.( $this->currentPage + $j ).'</a>';<br /> }<br /> }<br /> <br /> return $left.'<a href="'.$this->url.$this->currentPage.'" class="here">'.$this->currentPage.'</a>'.$right;<br /> }<br /> else<br /> {<br /> $allLink='';<br /> //当页码总数小于需要显示的链接数量时候,则全部显示出来<br /> for($j = 1; $j <= $this->pageAmount; $j++)<br /> {<br /> $allLink.='<a href="'.$this->url.$j.'" '.($j == $this->currentPage?$this->classHere:'').'>'.$j.'</a>';<br /> }<br /> return $allLink;<br /> }<br /> }<br /> <br />}<br />
------解决思路----------------------
这个类只负责分页条的产生
唯一可能与数据库查询有关的是参数数组 $param['totalRows'] 项
因为待分页的总行数是查询得到的,所以这个查询应在 $param 赋值之前完成
------解决思路----------------------
楼主也够懒的了,我这里有个给你,样式都写好了
<br /><?php<br />class Page { <br />private $total; //数据表中总记录数<br />private $listRows; //每页显示行数<br />private $limit;<br />private $uri; <br />private $pageNum; //页数<br />private $config=array('header'=>"个记录", "prev"=>"上一页", "next"=>"下一页", "first"=>"首 页", "last"=>"尾 页"); <br />private $listNum=8;<br />/* $total 11. * $listRows 12. */ <br />public function __construct($total, $listRows=10, $pa=""){ <br /> $this->total=$total; <br /> $this->listRows=$listRows; <br /> $this->uri=$this->getUri($pa); <br /> $this->page=!empty($_GET["page"]) ? $_GET["page"] : 1; <br /> $this->pageNum=ceil($this->total/$this->listRows); <br /> $this->limit=$this->setLimit(); <br /> } <br />private function setLimit(){ <br /> return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}"; <br /> } <br />private function getUri($pa){ <br /> $url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], '?')?'':"?").$pa; <br /> $parse=parse_url($url); <br /> if(isset($parse["query"])){ <br /> parse_str($parse['query'],$params); <br /> unset($params["page"]); <br /> $url=$parse['path'].'?'.http_build_query($params); <br /> } <br /> return $url; <br /> } <br />public function __get($args){ <br /> if($args=="limit") <br /> return $this->limit; <br /> else <br /> return null; <br /> } <br />private function start(){ <br /> if($this->total==0) <br /> return 0; <br /> else <br /> return ($this->page-1)*$this->listRows+1; <br /> } <br />private function end(){ <br /> return min($this->page*$this->listRows,$this->total);<br /> } <br />private function first(){ <br /> if($this->page==1) <br /> $html.=''; <br /> else <br /> $html.="<li><a href='{$this->uri}&page=1'>{$this->config["first"]}</a></li>"; <br /> return $html; <br /> } <br />private function prev(){<br /> if($this->page==1)<br /> $html.='';<br /> else <br /> $html.="<li><a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a></li>"; <br /> return $html;<br /> } <br />private function pageList(){<br /> $linkPage=""; <br /> $inum=floor($this->listNum/2); <br /> for($i=$inum; $i>=1; $i--){ <br /> $page=$this->page-$i;<br /> if($page<1)<br /> continue; <br /> $linkPage.="<li><a href='{$this->uri}&page={$page}'>{$page}</a></li>";<br /> } <br /> $linkPage.="<li><a href='#' class='here'>{$this->page}</a></li>";<br />for($i=1; $i<=$inum; $i++){ <br />$page=$this->page+$i; <br />if($page<=$this->pageNum) <br />$linkPage.="<li><a href='{$this->uri}&page={$page}'>{$page}</a></li>";<br />else <br />break; <br />}<br />return $linkPage;<br />}<br />private function next(){ <br />if($this->page==$this->pageNum)<br />$html.=''; <br />else <br />$html.="<li><a href='{$this->uri}&page=".($this->page+1)."'>{$this->config["next"]}</a></li>"; <br />return $html;<br />}<br />private function last(){ <br />if($this->page==$this->pageNum)<br />$html.='';<br />else<br />$html.="<li><a href='{$this->uri}&page=".($this->pageNum)."'>{$this->config["last"]}</a></li>";<br />return $html;<br />}<br />/*private function goPage(){<br />return ' <input type="text" class="inputall input50" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" value="'.$this->page.'" style="width:25px"> <input type="button" value="GO" style="width:45px;height:30;line-height:30px;border-radius:4px;" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'"> ';<br />}*/<br />private function goPage(){<br />return ' <input type="text" class="inputall input50" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" value="'.$this->page.'" style="width:25px"><input type="button" value="GO" style="width:45px;height:30;line-height:30px;border-radius:4px;" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'"> ';<br />}<br />function fpage($display=array(0,1,2,3,4,5,6,7,8)){<br />$html[0]="共有<b>{$this->total}</b>{$this->config["header"]} ";<br />$html[1]=" 每页显示<b>".($this->end()-$this->start()+1)."</b>条,本页<b>{$this->start()}-{$this->end()}</b>条 "; <br />$html[2]=" <b>{$this->page}/{$this->pageNum}</b>页 ";<br />$html[3]=$this->first();<br />$html[4]=$this->prev();<br />$html[5]=$this->pageList();<br />$html[6]=$this->next();<br />$html[7]=$this->last();<br />$html[8]=$this->goPage();<br />$fpage='';<br />foreach($display as $index){ <br />$fpage.=$html[$index];<br />} <br />return $fpage;<br />} <br />}<br />?><br />
具体调用方法:
$num=15; //每页显示数
$page=new page($total,$num);
$result=$db->query("select * from ".$db->table('article').$where." order by addtime desc {$page->limit}");
循环
fpage(array(3,4,5,6,7,0,1,2,8));?> //php分页类调用,这些数字可以去类文件里面看
-
fpage(array(3,4,5,6,7,8));?>
CSS样式文件
.fenye li{float:left; font-family:Arial, Helvetica, sans-serif; margin-left:6px; display:inline; line-height:30px;}
.fenye a{display:block;height:30px; min-width:30px; text-align:center; font-size:14px; border:1px solid #d6d6d6; float:left; margin-left:3px; padding:3px 5px;line-height:30px;text-decoration:none;color:#666;}
.fenye a:hover{background:#FF4500;border-color:#FF4500; color:#FFF;}
.fenye a.here{background:#FF4500;border-color:#FF4500; color:#FFF;}
.fenye .sel{background:#E5EDF2; color:#333; font-weight:bold; border:1px #C2D5E3 solid; padding:0 12px; border-radius:4px}
下面上效果图:


Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

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Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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