在jQuery验证后将数据插入数据库.按钮仅用于验证

我想在jquery验证后将数据插入我的数据库。然而，提交按钮只用于验证，它不会提交数据。请帮帮我，谢谢~

<form id="myform"  method="POST">
<label for="username">Username: </label>
<input type="text" class="left" id="username" name="username">
<label for="name">Name: </label>
<input type="text" class="left" id="name" name="name">
<label for="password">Password </label>
<input type="password" class="left" id="password" name="password">
<label for="repassword">Password </label>
<input type="password" class="left" id="repassword" name="repassword">
<label for="email">Email </label>
<input type="email" class="left" id="email" name="email">
<label for="contact">Contact</label>
<input type="text" class="contact" id="contact" name="contact">
<input id="submit" type="submit" name="submit" value="Send" />  
</form>

这是我的jquery验证表单

<script>
$.validator.addMethod('contact', function (value, element) {
    return this.optional(element) || /^'d{3}-'d{7}$/.test(value);
}, "Please enter a valid phone number");
jQuery.validator.addMethod( 'passwordMatch', function(value, element) {
    // The two password inputs
    var password = $("#password").val();
    var confirmPassword = $("#repassword").val();
    // Check for equality with the password inputs
    if (password != confirmPassword ) {
        return false;
    } else {
        return true;
    }
}, "Your Passwords Must Match");
$(document).ready(function() {
$( "#myform" ).validate({
  rules: {
      debug:false,
      username: {
      required: true,
      rangelength:[4,10],
      // remote: "user_check2.php"
    },
    name: {
      required: true,
      rangelength:[4,10]
    },
    password: {
      required: true,
      rangelength:[6,10]
    },
    repassword: {
    passwordMatch: true // set this on the field you're trying to match
    },
    email: {
     required: true,
    },
    contact: {
     required: true,
    },
  },
   messages: {
    username: {
      //remote:"Username already existed",
      required:"Enter your username",
    },  
    name: {
      required:"Please enter your name",
    },
    password: {
      required:"Please enter your Password",
      rangelength:"You must contain 6 to 10 character"
    },
    contact: {
     required:"Please enter your phone number",
  },           
});
});
</script>

最后一步是将数据插入到数据库中的表中。然而，提交按钮不工作

<?php 
    if(isset($_POST['submit']))
    {   
        $adminusername = $_POST["username"];
        $name = $_POST["name"];
        $email = $_POST["email"];
        $phone = $_POST["contact"];
        $password = $_POST["password"];
        //$query = "select * from admin where Admin_Username = '$adminusername'";
        //$result = mysqli_query($conn,$query);
        //$rowcount = mysqli_num_rows($result);
        mysqli_query($conn,"Insert into admin(Admin_Username,Admin_Name,Admin_Email,Admin_Contact,Admin_Password) values 
             ('$adminusername','$name','$email','$phone','$password')");
        mysqli_close($conn);    
    }
?>