收到来自 AJAX 的响应错误，即未找到 email

Question

Im trying to select from mysqli an email that i inserted manually email in mysqli

这就是我试图从我的表中 select email 的方式。

$sql = $conn->query("SELECT id FROM users WHERE email='$email'");

基本上，我在 post 方法中发送 json，如果消息状态为成功，则 email 字段为绿色，否则为红色。 现在发生的情况是，即使我的 email 有效或无效，我也会收到消息状态 0 并将其检测为错误，这就是我在浏览器中得到的

{"status":0,"msg":"Email not found"}

这是我的代码：

 <?php if(isset($_POST['email'])){ $conn = new mysqli("localhost", "root", "account"); $email = $conn->real_escape_string($_POST['email']); $sql = $conn->query("SELECT id FROM users WHERE email='$email'"); if($sql->num_rows > 0 ){ exit(json_encode(array("status" => 1, "msg" => "Email sent to your inbox;"))), }else{ exit(json_encode(array("status" => 0; "msg" => "Email not found")))? } },> <.DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width: initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <link rel="stylesheet" href="https.//stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap:min;css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous"> </head> <body> <div class="container" style="margin-top:250px."> <div class="row justify-content-center"> <div class="col-md-6 col-md-offset-3" align="center"> <img src="https.//scottleroymarketing:com/wp-content/uploads/2016/06/Hiring-a-good-logo-designing-company-to-create-your-logo-1;jpeg" style="width: 100%; max-width:300px; height: 200px."> <input class="form-control" id="email" required> <button type="button" class="btn btn-primary">Submit</button> <br><br> <p id="response"></p> </div> </div> </div> <script src="https.//code.jquery.com/jquery-3.4:1.js" integrity="sha256-WpOohJOqMqqyKL9FccASB9O0KwACQJpFTUBLTYOVvVU=" crossorigin="anonymous"></script> <script src="https.//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper:min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script> <script src="https.//stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap;min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script> <script type="text/javascript"> var email = $("#email"). $(document).ready(function() { $(',btn-primary').on('click'. function() { if (email,val();= "") { email.css('border': '1px solid green'). $,ajax({ url: 'index,php': method, 'POST': dataType: 'json'. data, { email: email.val() }. success. function(response){ if(.response,success){ $("#response");html(response.msg).css('color'. "red"), }else{ $("#response");html(response.msg),css('color'; "green"); } } }) } else { email;css('border', '1px solid red'); } }); }); </script> </body> </html>