使用PHP實現(xiàn)簡單分頁類及其詳細的使用方法

2020-03-22 18:45:21

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本文實例講述了PHP實現(xiàn)的簡單分頁類及其詳細的使用方法。分享給大家供大家參考，具體如下：

<?php/* * 使用: * $page = new Page(連接符,查詢語句,當(dāng)前頁碼,每頁大小,頁碼符) * 連接符:一個MYSQL連接標(biāo)識符,如果該參數(shù)留空,則使用最近一個連接 * 查詢語句:SQL語句 * 當(dāng)前頁碼:指定當(dāng)前是第幾頁 * 每頁大小:每頁顯示的記錄數(shù) * 頁碼符:指定當(dāng)前頁面URL格式 * * 使用例子: * $sql = "select * from aa"; * $page = new Page($conn,$sql,$_GET['page'],4,"?page="); * * 獲得當(dāng)前頁碼 * $page->page; * * 獲得總頁數(shù) * $page->pageCount; * * 獲得總記錄數(shù) * $page->rowCount; * * 獲得本頁記錄數(shù) * $page->listSize; * * 獲得記錄集 * $page->list; * 記錄集是一個2維數(shù)組,例:list[0]['id']訪問第一條記錄的id字段值. * * 獲得頁碼列表 * $page->getPageList(); */html' target='_blank'>class Page{  //基礎(chǔ)數(shù)據(jù)  var $sql;  var $page;  var $pageSize;  var $pageStr;  //統(tǒng)計數(shù)據(jù)  var $pageCount; //頁數(shù)  var $rowCount; //記錄數(shù)  //結(jié)果數(shù)據(jù)  var $list = array(); //結(jié)果行數(shù)組  var $listSize ;  //構(gòu)造函數(shù)  function Page($conn,$sql_in,$page_in,$pageSize_in,$pageStr_in)  {    $this->sql = $sql_in;    $this->page = intval($page_in);    $this->pageSize = $pageSize_in;    $this->pageStr = $pageStr_in;    //頁碼為空或小于1的處理    if(!$this->page||$this->page<1)    {      $this->page = 1;    }    //查詢總記錄數(shù)    $rowCountSql = preg_replace("/([/w/W]*?select)([/w/W]*?)(from[/w/W]*?)/i","$1 count(0) $3",$this->sql);    if(!$conn)      $rs = mysql_query($rowCountSql) or die("bnc.page: error on getting rowCount.");    else      $rs = mysql_query($rowCountSql,$conn) or die("bnc.page: error on getting rowCount.");    $rowCountRow = mysql_fetch_row($rs);    $this->rowCount=$rowCountRow[0];    //計算總頁數(shù)    if($this->rowCount%$this->pageSize==0)      $this->pageCount = intval($this->rowCount/$this->pageSize);    else      $this->pageCount = intval($this->rowCount/$this->pageSize)+1;    //SQL偏移量    $offset = ($this->page-1)*$this->pageSize;    if(!$conn)   $rs = mysql_query($this->sql." limit $offset,".$this->pageSize) or    die("bnc.page: error on listing.");    else $rs = mysql_query($this->sql." limit $offset,".$this->pageSize,$conn) or  die("bnc.page: error on listing.");    while($row=mysql_fetch_array($rs))    {      $this->list[]=$row;    }    $this->listSize = count($this->list);  }  /*   * getPageList方法生成一個較簡單的頁碼列表   * 如果需要定制頁碼列表,可以修改這里的代碼,或者使用總頁數(shù)/總記錄數(shù)等信息進行計算生成.   */  function getPageList()  {    $firstPage;    $previousPage;    $pageList;    $nextPage;    $lastPage;    $currentPage;    //如果頁碼>1則顯示首頁連接    if($this->page>1)    {      $firstPage = "<a href=/"".$this->pageStr."1/">首頁</a>";    }    //如果頁碼>1則顯示上一頁連接    if($this->page>1)    {      $previousPage = "<a href=/"".$this->pageStr.($this->page-1)."/">上一頁</a>";    }    //如果沒到尾頁則顯示下一頁連接    if($this->page<$this->pageCount)    {      $nextPage = "<a href=/"".$this->pageStr.($this->page+1)."/">下一頁</a>";    }    //如果沒到尾頁則顯示尾頁連接    if($this->page<$this->pageCount)    {      $lastPage = "<a href=/"".$this->pageStr.$this->pageCount."/">尾頁</a>";    }    //所有頁碼列表    for($counter=1;$counter<=$this->pageCount;$counter++)    {      if($this->page == $counter)      {        $currentPage = "<b>".$counter."</b>";      }      else      {        $currentPage = " "."<a href=/"".$this->pageStr.$counter."/">".$counter."</a>"." ";      }      $pageList .= $currentPage;    }    return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." ";  }}?>

用法示例：

<?php@$db = mysql_connect('localhost', 'root', '123456') or    die("Could not connect to database.");//連接數(shù)據(jù)庫mysql_query("set names 'utf8'");//輸出中文mysql_select_db('test');    //選擇數(shù)據(jù)庫$sql = "select * from `users`"; //一個簡單的查詢$page = new Page('',$sql,$_GET['page'],5,"?page=");$rows = $page->list;foreach($rows as $row){  echo $row['UserName']."<br>";}echo $page->getPageList(); //輸出分頁列表?>

分頁視頻教程：PHP+Mysql分頁簡單教程