jQuery技术:检查电子邮件时是否存在jQueryvalidation消息

试试这个：-

 $(function() { $("form[name='form1']").validate({ // Specify the validation rules rules: { name:{ required: true, minlength: 3, maxlength: 50 }, email: { required: true, email: true, remote: "process?key=emailalready_register", }, mobile: { required: true, number: true, minlength: 10, maxlength: 10 } }, messages: { email: {remote: "Email already in use!"} }, submitHandler: function(form) { form.submit(); } }); }); 

进程.php

 function emailalready_register($conn){ if(isset($_POST['email'])) { $email =$conn->real_escape_string(trim($_POST['email'])); $sql_check_email="SELECT email FROM register WHERE email =?"; $stmt = $conn->prepare($sql_check_email); $stmt->bind_param("s", $email); $stmt->execute(); $stmt->bind_result($email); $rows = $stmt->fetch(); $total_rows = count($rows); if( $total_rows > 0 ){ echo 'false'; } else { echo 'true'; } $stmt->close(); $conn->close(); } } 

您的PHP文件应该返回true或false 。

您可以在html和target中放置一个div来输出消息，如下所示：

注意：您的电子邮件检查中提供的url错误。

将test.js更改为：

 $(function() { $("form[name='form1']").validate({ // Specify the validation rules rules: { name:{ required: true, minlength: 3, maxlength: 50 }, email: { required: true, email: true, remote: { url: "process.php", type: "post", dataFilter: function(data) { var json = JSON.parse(data); return """ + json.msg + """; } } }, mobile: { required: true, number: true, minlength: 10, maxlength: 10 } }, messages: { email: {remote: "email is in use!"} }, submitHandler: function(form) { form.submit(); } }); }); 

将您的process.php更改为：

 real_escape_string(trim($_POST['email'])); $sql_check_email="SELECT email FROM register WHERE email =?"; $stmt = $conn->prepare($sql_check_email); $stmt->bind_param("s", $email); $stmt->execute(); $stmt->bind_result($email); $rows = $stmt->fetch(); $total_rows = count($rows); if( $total_rows > 0 ){ echo json_encode(array("msg"=>"Already exists")); } else { echo json_encode(array("msg"=>"Not exists")); } $stmt->close(); $conn->close(); } */ echo json_encode(array("msg"=>"Already exists")); 

注意：这是用于演示消息，因此它将始终显示"Already exists" 。 注释最后一行并取消注释 process.php的其余部分并检查。请查找process.php代码并检查它是否正常工作。