原生JS實現(xiàn)Ajax通過GET方式與PHP進(jìn)行交互操作示例

?php
   $conn=mysql_connect("localhost","root","root") or die("數(shù)據(jù)庫連接失敗".mysql_error());
   mysql_select_db("db_database27",$conn) or die("數(shù)據(jù)庫連接失敗".mysql_error());
   mysql_query("set names gb2312");
?>

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">
head>
meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
title>通過XMLHttpRequest對象讀取HTML文件，并且輸出讀取結(jié)果/title>
style type="text/css">
!--
body {
  margin-left: 0px;
  margin-top: 00px;
  margin-right: 0px;
  margin-bottom: 0px;
}
-->
/style>/head>
script>
var xmlHttp;        //定義XMLHttpRequest對象
function createXmlHttpRequestObject(){
  //如果在internet Explorer下運行
  if(window.ActiveXObject){
    try{
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }catch(e){
      xmlHttp=false;
    }
  }else{
  //如果在Mozilla或其他的瀏覽器下運行
    try{
      xmlHttp=new XMLHttpRequest();
    }catch(e){
      xmlHttp=false;
    }
  }
   //返回創(chuàng)建的對象或顯示錯誤信息
  if(!xmlHttp)
    alert("返回創(chuàng)建的對象或顯示錯誤信息");
    else
    return xmlHttp;
}
function showsimple(){
  createXmlHttpRequestObject();
  var cont = document.getElementById("searchtxt").value;
  if(cont==""){
    alert('查詢關(guān)鍵字不能為空！');
    return false;
  }
    xmlHttp.onreadystatechange=StatHandler; //判斷URL調(diào)用的狀態(tài)值并處理
    xmlHttp.open("GET",'searchrst.php?cont='+cont,false);
    xmlHttp.send(null);
}
function StatHandler(){
  if(xmlHttp.readyState==4  xmlHttp.status==200){
    document.getElementById("webpage").innerHTML=xmlHttp.responseText;
  }
}
/script>
body>
table width="800" height="632" border="0" align="center" cellpadding="0" cellspacing="0" background="images/bj.jpg">
 tr>
  td width="260" height="245">nbsp;/td>
  td width="500" align="center" valign="bottom">strong>查詢員工信息，根據(jù)員工技能信息/strong>/td>
  td width="40">nbsp;/td>
 /tr>form id="searchform" name="searchform" method="get" action="#">
 tr>
  td height="40">nbsp;/td>
  td align="center">請輸入關(guān)鍵字：nbsp;input name="searchtxt" type="text" id="searchtxt" size="30" />
  nbsp;nbsp;input id="s_search" name="s_search" type="button" value="查詢" onclick="return showsimple()" />/td>
  td>nbsp;/td>
 /tr> /form>
 tr>
  td height="268">nbsp;/td>
  td align="center" valign="top">div id="webpage">/div>/td>
  td>nbsp;/td>
 /tr>
 tr>
  td>nbsp;/td>
  td>nbsp;/td>
  td>nbsp;/td>
 /tr>
/table>
/body>
/html>

?php
header('Content-type: text/html;charset=GB2312');        //指定發(fā)送數(shù)據(jù)的編碼格式
  include_once 'conn/conn.php';                //連接數(shù)據(jù)庫
    $cont = $_GET['cont'];                 //獲取Ajax傳遞的查詢關(guān)鍵字
    if(!empty($_GET['cont'])){               //判斷如果關(guān)鍵字不為空
      $sql = "select * from tb_administrator where explains like '%".$cont."%'"; //定義SQL語句
      $result=mysql_query($sql,$conn);          //執(zhí)行模糊查詢
      if(mysql_num_rows($result)>0){        //獲取查詢結(jié)果
        echo "table width='500' border='1' cellpadding='1' cellspacing='1' bordercolor='#FFFFCC' bgcolor='#666666'>";
        echo "tr>td height='30' align='center' bgcolor='#FFFFFF'>ID/td>td align='center' bgcolor='#FFFFFF'>名稱/td>td align='center' bgcolor='#FFFFFF'>編號/td>td align='center' bgcolor='#FFFFFF'>描述/td>/tr>";
 while($myrow=mysql_fetch_array($result)){           //循環(huán)輸出查詢結(jié)果
 echo "tr>td height='22' bgcolor='#FFFFFF'>".$myrow[id]."/td>";
 echo "td bgcolor='#FFFFFF'>".$myrow[user]."/td>";
  echo "td bgcolor='#FFFFFF'>".$myrow[number]."/td>";
echo "td bgcolor='#FFFFFF'>".$myrow[explains]."/td>";
echo "/tr>";
}
echo "/table>";
      }else{
      echo "沒有符合條件的數(shù)據(jù)";
      }
    }
?>