PHP?? ???? ???? ???? ??? ?? ? ??? ????. 1. "mysql_query"? ?? ??? ?? ??? SQL ?? 2. ajax? ???? ??? ?? 3. "function viewpage(p){...} "????? ???? ?????.

? ??? ?? ??: Windows 7 ???, PHP 7.1 ??, DELL G3 ???

PHP ???? ???? ???? ? ??? ?????

PHP?? ??? ??? ???? 3?? ??

??? ?? ?? ??? ????? ????.

?? 1: ???? ?? SQL ??? ?? ??? ?? ??? ???? ???. ??? ??? ????? ?????.
1.pager.class.php

<?php
  
  class pager {
    public $sql; //SQL查詢語句
    public $datanum; //查詢所有的數(shù)據(jù)總記錄數(shù)
    public $page_size; //每頁顯示記錄的條數(shù)
    protected $_errstr;
    protected $_conn;
    protected $_query_id;

    public function query($query)///這個函數(shù)有問題，暫時可以不用
    {
    $ret = false;
    if (!empty($query)) {
      if ($this->_conn === false || !is_resource($this->_conn)) {
       warningLog(__METHOD__ . &#39;: query sql with no connection&#39;, true);
      return false;
      }
    $this->_query_id = @mysql_query($query, $this->_conn);
    if ($this->_query_id === false) {
    $this->_errstr = @mysql_error();
    $ret = false;
     } else {
    $this->_errstr = &#39;SUCCESS&#39;;
    $ret = $this->_query_id;
      }
    }
     $msg = ($ret === false) ? &#39;false&#39; : strval($ret);
     debugLog(__METHOD__.": [$msg] returned for sql query [$query]");
    return $ret;
    }
function __construct($sql,$page_size) {
      $result = mysql_query($sql);
      $datanum = mysql_num_rows($result);
      $this->sql=$sql;
      $this->datanum=$datanum;
      $this->page_size=$page_size;
    }

    //當前頁數(shù)
    public function page_id() {
      if($_SERVER[&#39;QUERY_STRING&#39;] == ""){
        return 1;
      }elseif(substr_count($_SERVER[&#39;QUERY_STRING&#39;],"page_id=") == 0){
        return 1;
      }else{
        return intval(substr($_SERVER[&#39;QUERY_STRING&#39;],8));
      }
    }

    //剩余url值
    public function url() {
      if($_SERVER[&#39;QUERY_STRING&#39;] == ""){
        return "";
      }elseif(substr_count($_SERVER[&#39;QUERY_STRING&#39;],"page_id=") == 0){
        return "&".$_SERVER[&#39;QUERY_STRING&#39;];
      }else{
        return str_replace("page_id=".$this->page_id(),"",$_SERVER[&#39;QUERY_STRING&#39;]);
      }
    }

    //總頁數(shù)
    public function page_num() {
      if($this->datanum == 0){
        return 1;
      }else{
        return ceil($this->datanum/$this->page_size);
      }
    }
//數(shù)據(jù)庫查詢的偏移量
    public function start() {
      return ($this->page_id()-1)*$this->page_size;
    }

    //數(shù)據(jù)輸出
    public function sqlquery() {
      return $this->sql." limit ".$this->start().",".$this->page_size;
    }

    //獲取當前文件名
    private function php_self() {
      return $_SERVER[&#39;PHP_SELF&#39;];
    }

    //上一頁
    private function pre_page() {
      if ($this->page_id() == 1) { //頁數(shù)等于1
        return "<a href=".$this->php_self()."?page_id=1".$this->url().">上一頁</a> ";
      }elseif ($this->page_id() != 1) { //頁數(shù)不等于1
        return "<a href=".$this->php_self()."?page_id=".($this->page_id()-1).$this->url().">上一頁</a> ";
      }
    }

    //顯示分頁
    private function display_page() {
      $display_page = "";
      if($this->page_num() <= 10){ //小于10頁
        for ($i=1;$i<=$this->page_num();$i++) //循環(huán)顯示出頁面
          $display_page .= "<a href=".$this->php_self()."?page_id=".$i.$this->url().">".$i."</a> ";
          return $display_page;
      }elseif($this->page_num() > 10){ //大于10頁
        if($this->page_id() <= 6){
          for ($i=1;$i<=10;$i++) //循環(huán)顯示出頁面
            $display_page .= "<a href=".$this->php_self()."?page_id=".$i.$this->url().">".$i."</a> ";
            return $display_page;
        }elseif(($this->page_id() > 6) && ($this->page_num()-$this->page_id() >= 4)){
          for ($i=$this->page_id()-5;$i<=$this->page_id()+4;$i++) //循環(huán)顯示出頁面
            $display_page .= "<a href=".$this->php_self()."?page_id=".$i.$this->url().">".$i."</a> ";
 return $display_page;
        }elseif(($this->page_id() > 6) && ($this->page_num()-$this->page_id() < 4)){
          for ($i=$this->page_num()-9;$i<=$this->page_num();$i++) //循環(huán)顯示出頁面
            $display_page .= "<a href=".$this->php_self()."?page_id=".$i.$this->url().">".$i."</a> ";
            return $display_page;
        }
      }
    }

    //下一頁
    private function next_page() {
      if ($this->page_id() < $this->page_num()) { //頁數(shù)小于總頁數(shù)
        return "<a href=".$this->php_self()."?page_id=".($this->page_id()+1).$this->url().">下一頁</a> ";
      }elseif ($this->page_id() == $this->page_num()) { //頁數(shù)等于總頁數(shù)
        return "<a href=".$this->php_self()."?page_id=".$this->page_num().$this->url().">下一頁</a> ";
      }
    }

    // 設置分頁信息
    public function set_page_info() {
      $page_info = "共".$this->datanum."條 ";
      $page_info .= "<a href=".$this->php_self()."?page_id=1".$this->url().">首頁</a> ";
      $page_info .= $this->pre_page();
      $page_info .= $this->display_page();
      $page_info .= $this->next_page();
      $page_info .= "<a href=".$this->php_self()."?page_id=".$this->page_num().$this->url().">尾頁</a> ";
      $page_info .= "第".$this->page_id()."/".$this->page_num()."頁";
      return $page_info;
    }

  }
?>

2.

<?php
  //類的用法
  // 讀取分頁類
  include("pager.class.php");
  // 數(shù)據(jù)庫連接初始化
//  $db = new mysql();
  $impeach_host = &#39;10.81.43.139&#39;;
  $impeach_usr = &#39;vmtest15&#39;;
  $impeach_passwd = &#39;vmtest15&#39;;
  $impeach_name = &#39;ufeature&#39;;
  $impeach_con = mysql_connect($impeach_host, $impeach_usr, $impeach_passwd) or
    die("Can&#39;t connect ".mysql_error());
  mysql_select_db($impeach_name, $impeach_con);
  // 這是一個sql查詢語句，并得到查詢結果
  $sql = "select word from ufeature.spam_accuse_word_list where flag=&#39;0&#39;";
  // 分頁初始化
  $page = new pager($sql,20);
  // 20是每頁顯示的數(shù)量
  // $res_1 = mysql_query($sql) or
  //    die("Can&#39;t get result ".mysql_error());

   $result=mysql_query($page->sqlquery());
while($info = mysql_fetch_array($result,MYSQL_ASSOC)){

  // while($info = mysql_fetch_array($res_1, MYSQL_ASSOC)){
  echo $info["word"]."<br/>";
  }
  // 頁碼索引條
  echo $page->set_page_info();


?>

?? 2: ajax ??
1. ?? SQL ?? ?? ???? ?????

SELECT * FROM table …… limit 開始位置 ， 操作條數(shù) （其中開始位置是從0開始的）

??? 20? ??? ????: SELECT * FROM table... 0, 20
11?? ????? 20? ??? ????: SELECT * FROM table... Limit 10, 20
LIMIT n? LIMIT 0,n? ?????.

select * from table LIMIT 5; //?? 5? ??? ????, ? select * from table LIMIT 0, 5 2 ??? ??? ?????. ??? ???????? ?? ??? ?????? ????? ?? ?????.
???? ??, ?? ?? ????? ???(???? ??? ?, ?? ???? ????)?? 10? ???:????? *? ?????. 0,10

No.11~20 ???:
select * from table ?? 10,10
21~30?? ???: select * from table ?? 20,10
??? ?? ??:
(?? ??? number - 1) ???? X ??? ?, ???? ?? ?

Select * from table limit ($Page- 1) * $PageSize, $PageSize

? ??? ?? ??? ?? ?????. ?? ??? ?? ??. REQUEST_URI? ??? ??? ??? ?? ?? ??? ?? URI? ?? ? ?????.
?: ?? ???? ??? ????: http://www.test.com/home.php?id=23&cid=22echo $_SERVER["REQUEST_URI"]
???:/home.php?id=23&cid =22


4.parse_url() URL ?? ?? ??

parse_url()? URL? ??? ? ?? ?? ??? ?? ???? ?????. ?
?

$ua=parse_url("http://username:password@hostname/path?arg=value#anchor");
print_r($ua);

Array
(
 [scheme] => http  ；協(xié)議
 [host] => hostname  ；主機域名
 [user] => username  ；用戶
 [pass] => password  ；密碼
 [path] => /path   ；路徑
 [query] => arg=value  ；取參數(shù)
 [fragment] => anchor  ；
)

5. ?? ??

? ??? ???? ? ???? ???? ???, ??? ?????? ???, ??? ?? ???, ?? ??? ?? ??????.
(1) ??? ?????? ??? ??????? bbs?? ??? ???? ???, ???? ?? ??? ??, ??? ??? ???? ??, ??? ??, ??? ? ??? ?? ??? ???? ????. , ???? ?? ??, ??? ??
(2) ??? ??

<?php
$conn = @ mysql_connect("localhost", "root", "123456") or die("數(shù)據(jù)庫鏈接錯誤");
mysql_select_db("bbs", $conn);
mysql_query("set names &#39;GBK&#39;"); //使用GBK中文編碼;
//將空格，換行轉換為HTML可解析
function htmtocode($content) {
 $content = str_replace("\n", "<br>", str_replace(" ", " ", $content)); //兩個str_replace嵌套
 return $content;
}
//$content=str_replace("&#39;","‘",$content);
 //htmlspecialchars();
 
?>

<?php
 include("conn.php");
$pagesize=2; //設置每頁顯示2個記錄
$url=$_SERVER["REQUEST_URI"]; 
$url=parse_url($url);
$url=$url[path];

$numq=mysql_query("SELECT * FROM `message`");
$num = mysql_num_rows($numq);
if($_GET){
$pageval=$_GET;
$page=($pageval-1)*$pagesize;
$page.=&#39;,&#39;;
}
if($num > $pagesize){
 if($pageval<=1)$pageval=1;
 echo "共 $num 條".
 " <a href=$url?page=".($pageval-1).">上一頁</a> <a href=$url?page=".($pageval+1).">下一頁</a>";
}
$SQL="SELECT * FROM `message` limit $page $pagesize ";
 $query=mysql_query($SQL);
 
 while($row=mysql_fetch_array($query)){
?>
<table width=500 border="0" cellpadding="5" cellspacing="1" bgcolor="#add3ef">
 <tr bgcolor="#eff3ff">
 <td>標題：<?php echo $row[title]?></td> <td>時間：<?php echo $row[lastdate]?></td>
 </tr>
 <tr bgcolor="#eff3ff">
 <td> 用戶：<?php echo $row[user]?></td><td></td>
 </tr>
 <tr>
 <td>內容：<?php echo htmtocode($row[content]);?></td>
 </tr>
 <br>
</table>
<?php
 }
?>

?? 3:

<script> 
function viewpage(p){ 
if(window.XMLHttpRequest){ 
var xmlReq = new XMLHttpRequest(); 
} else if(window.ActiveXObject) { 
var xmlReq = new ActiveXObject(&#39;Microsoft.XMLHTTP&#39;); 
} 
var formData = "page="+p; 
xmlReq.onreadystatechange = function(){ 
if(xmlReq.readyState == 4){ 
document.getElementByIdx_x(&#39;content2&#39;).innerHTML = xmlReq.responseText; 
} 
} 
xmlReq.open("post", "hotel_list.php", true); 
xmlReq.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
xmlReq.send(formData); 
return false; 
} 
</script>

???? 2:

header("Content-Type:text/html;charset=GB2312"); 
$pagesize=10; 
//echo $_POST['page']; 
$result = mysql_query("Select count(DISTINCT hotelname) FROM ".TBL_HOTELS); 
$myrow = mysql_fetch_array($result); 
$numrows=$myrow[0]; 

$pages=intval($numrows/$pagesize); 
if ($numrows%$pagesize) 
$pages++; 
if (isset($_POST['page'])){ 
$page=intval($_POST['page']); 
} 
else{ 
//設置為第一頁 
$page=1; 
} 
$first=1; 
$prev=$page-1; 
$next=$page+1; 
$last=$pages; 
//計算記錄偏移量 
$offset=$pagesize*($page - 1); 
//讀取指定記錄數(shù) 
$result=mysql_query("select `hotelname` , count( * ) from ".TBL_HOTELS." GROUP BY `hotelname` order by id desc limit $offset,$pagesize"); 
$num = mysql_num_rows($result); 
while ($row = mysql_fetch_array($result,MYSQL_NUM)) { 
$hotelname[] = $row[0]; 
$countpeople[] = $row[1]; 
} 
for($a=0;$a<$num;$a++) 
{ 
//$result=mysql_query("select count(title) from " . TBL_Comments ." where `title`=\"".$title[$a]."\""); 
//$row = mysql_fetch_row($result); 
echo "<TABLE style=\"MARGIN-BOTTOM: 20px\" cellSpacing=0 cellPadding=0 width=100% border=0>\n"; 
echo "<TBODY>\n"; 
echo "<TR>\n"; 
echo "<TD style=\"PADDING-TOP: 5px\" vAlign=top align=left width=80>\n"; 
//rating_bar($title[$a],5); 
echo "</TD>\n"; 
echo "<TD style=\"PADDING-TOP: 5px\" align=left width=100%><A title=$hotelname[$a] style=\"FONT-SIZE: 14px\" href=#>$hotelname[$a]</A>\n"; 
echo "</TD></TR>\n"; 
echo " <TR>\n"; 
echo "<TD></TD>\n"; 
echo "<TD style=\"PADDING-LEFT: 0px\">\n"; 
echo "<IMG src=\"images/comment.gif\" border=0> 推薦人數(shù):($countpeople[$a]) |\n"; 
echo "<SPAN>平均分：<STRONG></STRONG> (".$count."票) | 評論數(shù):()</SPAN>\n"; 
echo "</TD></TR></TBODY></TABLE>\n"; 
} 
echo "<TABLE style=\"MARGIN-TOP: 30px\" cellSpacing=0 cellPadding=0 width=\"100%\""; 
echo "border=0>"; 
echo "<TBODY><TR><TD colSpan=3 height=20>"; 
echo "<p align=center>"; 
echo "<P align=left><FONT color=red>第".$page."頁/總".$pages."頁 | 總".$numrows."條</FONT> | "; 
if ($page>1) echo "<a onclick=\"viewpage(".$first.")\" href=&#39;#&#39;>首頁</a> | "; 
if ($page>1) echo "<a onclick=\"viewpage(".$prev.")\" href=&#39;#&#39;>上頁</a> | "; 
if ($page<$pages) echo "<a onclick=\"viewpage(".$next.")\" href=&#39;#&#39;>下頁</a> | "; 
if ($page<$pages) echo "<a onclick=\"viewpage(".$last.")\" href=&#39;#&#39;>尾頁</a>"; 
echo "轉到第 <INPUT maxLength=3 size=3 value=1 name=goto_page> 頁 <INPUT hideFocus onclick=\"viewpage(document.all.goto_page.value)\" type=button value=Go name=cmd_goto>"; 
echo "</P></p></TD></TR></TBODY></TABLE>";

?? ??: "PHP ??? ????"

? ??? PHP?? ???? ???? ???? ?? ??? ????.? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!