標籤：log text color 資料 data doc cal highlight 註冊
check_user.php
<?php $link=mysqli_connect(‘localhost‘,‘root‘,‘root‘,‘test‘);//串連資料庫if(mysqli_connect_errno()){ echo mysqli_connect_error();} $query="select * from username where username=‘{$_GET[‘username‘]}‘"; $result=mysqli_query($link,$query); $data=mysqli_fetch_assoc($result); echo $data=json_encode($data);?>
index.php
<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><title>Document</title><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/index.js"></script></head><body><input type="text" id="namevalue"><span class="error"></span><br><button id="btn">Send</button>結果：<span id="result"></span></body></html>
index.js
$(function(){ $("#namevalue").blur(function(){ $.get("/jquery/check_user.php",{ username:$("#namevalue").val() },function(data,status){ if(data!=null){ $("#result").text(""); $(".error").text("使用者名稱登入"); }else{ $(".error").text(""); $("#result").text($("#namevalue").val()); } },"json"); });});
jquery json 判斷使用者是否登入
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