Ajax+PHP實(shí)現(xiàn)的刪除數(shù)據(jù)功能示例

?php
  $conn = mysql_connect("localhost", "root", " ") or die("連接數(shù)據(jù)庫服務(wù)器失??！".mysql_error()); //連接MySQL服務(wù)器
  mysql_select_db("db_database27",$conn); //選擇數(shù)據(jù)庫db_database27
  mysql_query("set names utf8"); //設(shè)置數(shù)據(jù)庫編碼格式utf8
?>

?php
  include_once("conn/conn.php");//包含數(shù)據(jù)庫連接文件
    $id=$_GET['id'];//把傳過來的參數(shù)值賦給變量$i
    $sql=mysql_query("delete from tb_demo02 where id=".$id);//根據(jù)參數(shù)值執(zhí)行相應(yīng)的刪除操作
    if($sql){//如果操作的返回值為true
     $reback=1;//把變量$reback的值設(shè)為1
    }else{
     $reback=0;//否則變量$reback的值設(shè)為0
    }
    echo $reback;//輸出變量$reback的值
?>

function del(id){
    var xml;
    if(window.ActiveXObject){//如果是瀏覽器支持ActiveXObjext則創(chuàng)建ActiveXObject對(duì)象
     xml=new ActiveXObject('Microsoft.XMLHTTP');
    }else if(window.XMLHttpRequest){//如果瀏覽器支持XMLHttpRequest對(duì)象則創(chuàng)建XMLHttpRequest對(duì)象
     xml=new XMLHttpRequest();
    }
    xml.open("GET","del.php?id="+id,true);//使用GET方法調(diào)用del.php并傳遞參數(shù)的值
    xml.onreadystatechange=function(){//當(dāng)服務(wù)器準(zhǔn)備就緒執(zhí)行回調(diào)函數(shù)
     if(xml.readystate==4  xml.status==200){//如果服務(wù)器已經(jīng)傳回信息并未發(fā)生錯(cuò)誤
        var msg=xml.responseText;//把服務(wù)器傳回的值賦給變量msg
        if(msg==1){//如果服務(wù)器傳回的值為1則提示刪除成功
         alert("刪除成功！");
      location.reload();
        }else{//否則提示刪除失敗
         alert("刪除失??！");
         return false;
        }
   }
    }
    xml.send(null);//不發(fā)送任何數(shù)據(jù)，因?yàn)閿?shù)據(jù)已經(jīng)使用請(qǐng)求URL通過GET方法發(fā)送
}

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=utf-8">
title>分組統(tǒng)計(jì)/title>
link rel="stylesheet" type="text/css" href="mystyle.css" rel="external nofollow" >
/head>
body>
script type="text/javascript" src="index.js">/script>
center>
!--banner-->
table width="798" border="0" cellpadding="0" cellspacing="0">
  tr>
      td height="112" background="images/banner.jpg">/td>
  /tr>
/table>
?php
include_once("conn/conn.php");
?>
table width="780" border="0" cellpadding="0" cellspacing="0">
form name="form1" id="form1" method="post" action="deletes.php">
 tr>
     td height="20" width="5%" class="top">nbsp;/td>
  td width="5%" class="top">id/td>
  td width="30%" class="top">書名/td>
  td width="10%" class="top">價(jià)格/td>
  td width="20%" class="top">出版時(shí)間/td>
  td width="10%" class="top">類別/td>
    td width="10%" class="top">操作/td>
 /tr>
?php
    $sqlstr1 = "select * from tb_demo02 order by id";//按id的升序查詢表tb_demo02的數(shù)據(jù)
    $result = mysql_query($sqlstr1,$conn);//執(zhí)行查詢語句
    while ($rows = mysql_fetch_array($result)){//循環(huán)輸出查詢結(jié)果
?>
 tr>
  td height="25" align="center" class="m_td">
    input type=checkbox name="chk[]" id="chk" value=".$rows['id'].">
    /td>
    td height="25" align="center" class="m_td">?php echo $rows['id'];?>/td>
    td height="25" align="center" class="m_td">?php echo $rows['bookname'];?>/td>
  td height="25" align="center" class="m_td">?php echo $rows['price'];?>/td>
    td height="25" align="center" class="m_td">?php echo $rows['f_time'];?>/td>
    td height="25" align="center" class="m_td">?php echo $rows['type'];?>/td>
    td class="m_td">a href="#" rel="external nofollow" onClick="del(?php echo $rows['id'];?>)">刪除/a>/td>
 /tr>
?php
    }
?>
tr>
    td height="25" colspan="7" class="m_td" align="left">nbsp;nbsp;/td>
/tr>
/form>
/table>
!--show-->
 table width="798" border="0" cellpadding="0" cellspacing="0">
  tr>
   td height="48" background="images/bottom.jpg">nbsp;/td>
  /tr>
/table>
/center>
/body>
/html>