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jQuery+AJAX+PHP+MySQL develops search function without jump or refresh
jQuery+AJAX+PHP+MySQL develops search function without jump or refresh
This article mainly introduces the function of jQuery AJAX PHP MySQL development search without jump and refresh. It has certain reference value. Now I share it with everyone. Friends in need can refer to it
Knowledge points : ajax submits the form, php queries the database, php returns the json array, and javascript traverses and outputs the json array
Demonstration:
1. When no keywords are entered in the form, " is returned Please enter keywords..."
#2. When the keyword query entered in the form fails, "No results"## will be returned.
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 (!$con)
{
die('连接数据库失败，失败原因：' . mysql_error());
}
//设置数据库字符集
mysql_query("SET NAMES UTF8");
//查询数据库
mysql_select_db($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 $tb WHERE title like '%$keyword%' 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"; ?>
##Database name: test
Fields: id, title, url
Field analysis:
id - self-increment ID
title - title
url - page link
The above is the entire content of this article, I hope it will be helpful to everyone Learning will be helpful. For more related content, please pay attention to the PHP Chinese website!
Related recommendations:
About the operations of extend, mixins, extends, components, install in vueInstallation of PHP And an introduction to integrating with apacheThe above is the detailed content of jQuery+AJAX+PHP+MySQL develops search function without jump or refresh. For more information, please follow other related articles on the PHP Chinese website!
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