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Check duplicate email or mobile number with ajax, PHP

Here we using 3 file for view data from MySql database using Ajax.

  1. database.php
  2. save.php
  3. index.php

Table user_data

  CREATE TABLE `crud` (
  `id` int(11) NOT NULL,
  `name` varchar(100) NOT NULL,
  `email` varchar(100) NOT NULL,
  `phone` varchar(100) NOT NULL,
  `city` varchar(100) NOT NULL


	$servername = "localhost";
	$username = "root";
	$password = "";
	// Create connection
	$conn = mysqli_connect($servername, $username, $password,$db);


	include 'database.php';
	$duplicate=mysqli_query($conn,"select * from crud where email='$email'");
	if (mysqli_num_rows($duplicate)>0)
		echo json_encode(array("statusCode"=>201));
		$sql = "INSERT INTO `crud`( `name`, `email`, `phone`, `city`) 
		VALUES ('$name','$email','$phone','$city')";
		if (mysqli_query($conn, $sql)) {
			echo json_encode(array("statusCode"=>200));
		else {
			echo json_encode(array("statusCode"=>201));


<!DOCTYPE html>
	<title>Insert data in MySQL database using Ajax</title>
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div style="margin: auto;width: 60%;">
	<div class="alert alert-success alert-dismissible" id="success" style="display:none;">
	  <a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
	<div class="alert alert-danger alert-dismissible" id="error" style="display:none;">
	  <a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
	<form id="fupForm" name="form1" method="post">
		<div class="form-group">
			<label for="email">Name:</label>
			<input type="text" class="form-control" id="name" placeholder="Name" name="name">
		<div class="form-group">
			<label for="pwd">Email:</label>
			<input type="email" class="form-control" id="email" placeholder="Email" name="email">
		<div class="form-group">
			<label for="pwd">Phone:</label>
			<input type="text" class="form-control" id="phone" placeholder="Phone" name="phone">
		<div class="form-group" >
			<label for="pwd">City:</label>
			<select name="city" id="city" class="form-control">
				<option value="">Select</option>
				<option value="Delhi">Delhi</option>
				<option value="Mumbai">Mumbai</option>
				<option value="Pune">Pune</option>
		<input type="button" name="save" class="btn btn-primary" value="Save to database" id="butsave">

$(document).ready(function() {
	$('#butsave').on('click', function() {
		$("#butsave").attr("disabled", "disabled");
		var name = $('#name').val();
		var email = $('#email').val();
		var phone = $('#phone').val();
		var city = $('#city').val();
		if(name!="" && email!="" && phone!="" && city!=""){
				url: "save.php",
				type: "POST",
				data: {
					name: name,
					email: email,
					phone: phone,
					city: city				
				cache: false,
				success: function(dataResult){
					var dataResult = JSON.parse(dataResult);
						$('#success').html('Data added successfully !'); 						
					else if(dataResult.statusCode==201){
						$('#error').html('Email ID already exists !');
			alert('Please fill all the field !');