jQuery+AJAX+PHP+MySQLでジャンプやリフレッシュを行わない検索機能を開発

nbsp;html>

    
    <meta>
    <meta>
    <title>AJAX搜索</title>
    <style>
        *{margin:0px;padding:0px;}
        h2{
            text-align: center;
        }

        #search_con{
            width: 300px;
            margin:10px auto;
        }

        #keywords{
            width: 300px;
            margin-top: 10px;
            height: 30px;
        }

        #btn{
            width: 305px;
            height: 35px;
            margin-top: 10px;
        }

        #search_result{
            width: 300px;
            margin:30px auto;
        }
    </style>
    <script></script>
    <script>
        $(function(){
            $("button").click(function(){
                var inputVal = $("#keywords").val();
                $.ajax({
                    type:"GET",
                    url:"search.php?keywords=" + inputVal,
                    dataType:"json",
                    success:function(data){
                        $(function(){
                            var con="";
                            $.each(data,function(i,data){
                                if (data.result == "0") {
                                    con+="<p>请输入关键词..."
                                }else if(data.result == "1"){
                                    con+="<p>无结果"
                                }else{
                                    con+="<p>"+data.title+""
                                }
                            });
                                console.log(con);
                                $("#search_result").html(con);
                        })
                        return false; 
                    }
                })
            })
        })
    </script>


<!-- 表单 -->
    <p>
    </p>

<?php header("Content-type:application/json");
//定义参数
$keywords = $_GET["keywords"];
//获取数据库配置
require_once("config.php");
//连接数据库
$con = mysql_connect($host,$username,$password);
  if (!$con)
    {
      die(&#39;连接数据库失败，失败原因：&#39; . mysql_error());
    }
  //设置数据库字符集  
  mysql_query("SET NAMES UTF8");
  //查询数据库
  mysql_select_db($db, $con);
  //过滤关键词左右空格
  $keyword = trim($keywords);
  if (empty($keyword)) {
  //如果关键词为空，则返回result=0
  echo "[{\"result\":\"0\"}]";
    }else{
      $result = mysql_query("SELECT * FROM $tb WHERE title like &#39;%$keyword%&#39; ORDER BY ID DESC");
      $num = mysql_num_rows($result);
      if ($num) {
        $search_result = array();
          while($row = mysql_fetch_array($result)){
              $search_result[] = $row;
          }
          // 将数组转成json格式
          echo json_encode($search_result);
  
  }else{
    //如果查询无果，则返回result=1
    echo "[{\"result\":\"1\"}]";
  }
}
?>

<?php //配置文件 - BY TANKING
$host="localhost";
$username="root";
$password="root";
$db="test";
$tb="datalist";
?>