在細(xì)說(shuō)php上看到的分頁(yè)類，分享給大家

page.class.php

<?php/*** file:page.class.php*完美分頁(yè)類:page*/class Page{private $total; //數(shù)據(jù)表中總記錄private $listRows; //每頁(yè)顯示行數(shù)private $limit; //SQL語(yǔ)句使用limit從句限制記錄條數(shù)private $uri; //自動(dòng)獲取URL的請(qǐng)求地址private $pageNum; //總頁(yè)數(shù)private $page; //當(dāng)前頁(yè)碼//分頁(yè)信息中顯示的內(nèi)容，可以自己通過(guò)set()方法設(shè)置private $config = array(‘head‘ => ‘條記錄‘,‘prev‘ => ‘上一頁(yè)‘,‘next‘ => ‘下一頁(yè)‘,‘first‘ => ‘首頁(yè)‘,‘last‘ => ‘末頁(yè)‘);private $listNum = 10; //默認(rèn)分頁(yè)列表顯示的個(gè)數(shù)/*** 構(gòu)造方法：自動(dòng)加載，設(shè)置分頁(yè)類的屬性* @param int $total 計(jì)算分頁(yè)的總記錄數(shù)* @param int $listRows 可選的，設(shè)置每頁(yè)需呀顯示的記錄數(shù)，默認(rèn)是25條* @param mixed $query 可選的，為向目標(biāo)頁(yè)面?zhèn)鬟f參數(shù)，可以是數(shù)組，也可以是查詢字符串的格式* @param bool $ord 可選的，默認(rèn)值為true，頁(yè)面從第一頁(yè)開(kāi)始顯示，false則為最后一頁(yè)* */public function __construct($total, $listRows = 25, $query = "", $ord = true){$this->total = $total;$this->listRows = $listRows;$this->uri = $this->getUri($query);$this->pageNum = ceil($this->total / $this->listRows);//ceil()進(jìn)一取整函數(shù)/*以下判斷用來(lái)設(shè)置當(dāng)前頁(yè)面*///判斷接收過(guò)來(lái)的數(shù)據(jù)是否為空if (!empty($_GET["page"])) {$page = $_GET["page"];} else {if ($ord) {$page = 1;} else {$page = $this->pageNum;}}//是否有記錄if ($total > 0) {if (preg_match(‘/D/‘, $page))//正則驗(yàn)證{$this->page = 1;} else {$this->page = $page;}} else {$this->page = 0;}$this->limit = "LIMIT " . $this->setLimit();}/**自定義方法set():用于設(shè)置分頁(yè)的信息，可以進(jìn)行連貫操作@param string $param 成語(yǔ)屬性數(shù)組config的下標(biāo)@param string $value 用于設(shè)置config下標(biāo)對(duì)應(yīng)的元素值@param object 返回本對(duì)象自己$this, 用于連貫操作*/function set($param, $value){if (array_key_exists($param, $this->config)) {$this->config[$param] = $value;}return $this;}/**不是直接去調(diào)用，通過(guò)該方法，可以使用在對(duì)象外部直接獲取私有成員屬性limit和page值*/function __get($args){if ($args == "limit" || $args == "page") {return $this->$args;} else {return null;}}/***按指定的格式輸出分頁(yè)信息* @param int 0-7 自定義輸出分頁(yè)結(jié)構(gòu)和調(diào)整結(jié)構(gòu)順序，默認(rèn)輸出全部結(jié)構(gòu)* @return string 分頁(yè)信息內(nèi)容*/function fpage(){$arr = func_get_args(); //以數(shù)組形式返回一個(gè)函數(shù)參數(shù)列表$html[0] = "?共<b> {$this->total} </b> {$this->config["head"]}?";$html[1] = "?本頁(yè)<b>" . $this->disnum() . "</b>條記錄?";$html[2] = "?本頁(yè)從<b> {$this->start()} - {$this->end()} </b>條?";$html[3] = "?<b>{$this->page}/{$this->pageNum}</b>頁(yè)?";$html[4] = $this->firstprev();$html[5] = $this->pageList();$html[6] = $this->nextlast();$html[7] = $this->goPage();$fpage = ‘<div style="font:12px ‘5B8B4F53‘, san-serif;"> ‘;/**$conNum = count($arr);默認(rèn)如果不指定分頁(yè)結(jié)構(gòu)信息，此時(shí)$conNum為0* 所以當(dāng)?shù)?14行for循環(huán)時(shí)候一開(kāi)始的條件就不滿足，就不會(huì)輸出東西*只有當(dāng)執(zhí)行if判斷，執(zhí)行完畢后$conNum為7* 所以這個(gè)時(shí)候需要重新處理一次count($arr),得到一個(gè)返回值再進(jìn)行for循環(huán)*/if (count($arr) < 1)$arr = array(0, 1, 2, 3, 4, 5, 6, 7);//為什么沒(méi)有113行代碼，此處用$conNum = count($arr);代替for循環(huán)中的count($arr),不能輸出？$conNum = count($arr);for ($i = 0; $i < $conNum; $i++) {$fpage .= $html[$arr[$i]];}$fpage .= ‘</div>‘;return $fpage;}/**獲取本頁(yè)顯示的記錄數(shù)*/private function disnum(){if($this->total > 0){return $this->end()-$this->start()+1;}else{return 0;}}/**獲取上一頁(yè)和首頁(yè)的操作信息*/private function firstprev(){if ($this->page > 1) {$str = "?<a href = ‘{$this->uri}page=1‘>{$this->config["first"]}</a>?";$str .= "<a href=‘{$this->uri}page=" .($this->page - 1) . "‘>{$this->config["prev"]}</a>?";return $str;}}/**獲取頁(yè)數(shù)列表信息*/private function pageList(){$linkPage = "?<b>";$inum = floor($this->listNum/2);/*當(dāng)前頁(yè)面的列表*/for ($i = $inum; $i >= 1; $i--) {$page = $this->page - $i;if ($page >= 1) {$linkPage .= "<a herf=‘{$this->uri}page={$page}‘>{$page}</a>?";}}/*當(dāng)前頁(yè)面的信息*/if ($this->pageNum > 1)$linkPage .= "<span style=‘padding: 1px 2px;background: #BBB; color: #ffffff‘>{$this->page}</span>?";/*當(dāng)前頁(yè)后面的列表*/for ($i = 1; $i <= $inum; $i++) {$page = $this->page + $i;if ($page <= $this->pageNum)$linkPage .= "<a href=‘{$this->uri}page={$page}‘>{$page}</a>?";elsebreak;}$linkPage .= ‘<b>‘;return $linkPage;}/**獲取下一頁(yè)和尾頁(yè)的操作信息*/private function nextlast(){if ($this->page != $this->pageNum) {$str = "?<a href=‘{$this->uri}page=" . ($this->page + 1) . "‘>{$this->config["next"]}</a>?";$str .= "?<a href=‘{$this->uri}page=" . ($this->pageNum) . "‘>{$this->config["last"]}</a>?";return $str;}}/**用于顯示和處理表單跳轉(zhuǎn)頁(yè)面*/private function goPage(){if ($this->pageNum > 1){return ‘?<input style="width:20px;height:17px !important;height:18px;border:1px solid #cccccc;" type="text" οnkeydοwn="javascript:if(event.keyCode==13){var page=(this.value>‘.$this->pageNum.‘)?‘.$this->pageNum.‘:this.value;location=‘‘.$this->uri.‘page=‘+page+‘‘}" value="‘.$this->page.‘"><input style="cursor:pointer;width:25px;height:18px;border:1px solid #cccccc;" type="button" value="GO" οnclick="javascript:var page=(this.previousSibling.value>‘.$this->pageNum.‘)?‘.$this->pageNum.‘:this.previousSibling.value;location=‘‘.$this->uri.‘page=‘+page+‘‘">?‘;}}/**在對(duì)象內(nèi)部使用的私有方法，設(shè)置當(dāng)前頁(yè)面第一條數(shù)據(jù)記錄*/private function setLimit(){if ($this->page > 0) {return ($this->page - 1) * $this->listRows . ", {$this->listRows}";} else {return 0;}}/**在對(duì)象內(nèi)部使用的私有方法，用于自動(dòng)獲取訪問(wèn)的當(dāng)前URL*/private function getUri( $query ){$request_uri = $_SERVER["REQUEST_URI"];$url = strstr($request_uri, ‘?‘) ? $request_uri : $request_uri . ‘?‘;if (is_array($query)) {$url .= http_build_query($query);} elseif ($query != "") {$url .= "&" . trim($query, "?&");}$arr = parse_url($url);if (isset($arr["query"])) {parse_str($arr["query"], $arrs);unset($arrs["page"]);$url = $arr["path"] . ‘?‘ . http_build_query($arrs);}if (strstr($url, ‘?‘)) {if (substr($url, -1) != ‘?‘)$url = $url.‘&‘;}else {$url = $url . ‘?‘;}return $url;}/**在對(duì)象內(nèi)部使用的私有方法，用于獲取當(dāng)前頁(yè)開(kāi)始的記錄數(shù)*/private function start(){if ($this->total == 0)return 0;elsereturn ($this->page - 1) * $this->listRows + 1;}/**用于記錄當(dāng)前頁(yè)面結(jié)束的記錄數(shù)*/private function end(){return min($this->page * $this->listRows, $this->total);}}
測(cè)試代碼：

<?phpheader("Content-type: text/html; charset=utf-8");/*第一步：包含分頁(yè)類所在文件page.class.php*/include "page.class.php";/*第二步：實(shí)例化分頁(yè)對(duì)象*/$page = new Page(100);/*第三部：通過(guò)對(duì)象中的limit屬性，獲取LIMIT從句并組合SQL語(yǔ)句，從數(shù)據(jù)表artical中獲取當(dāng)頁(yè)的數(shù)據(jù)*/$sql = "select * from artical {$page->limit}";echo ‘SQL = " ‘.$sql.‘"‘;/*第四步：通過(guò)扉頁(yè)對(duì)象中的fpage()方法，輸出所有分頁(yè)的結(jié)構(gòu)信息 */echo $page -> fpage();

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