Simple Chatbot using PHP with MySQL & jQuery (Ajax)



Simple Chatbot using PHP with MySQL & jQuery (Ajax)

Hello readers, Today in this blog you’ll learn how to create a Simple Chatbot using PHP with MySQL & jQuery (Ajax). Earlier I shared a blog on how to Send Emails with PHP from Localhost using the XAMPP server and now it’s time to create a working chatbot in PHP.

A chatbot is a computer program designed to simulate human conversation. These chatbots reply to you instantly according to your queries because programmers have inserted thousands of inputs, replies, and queries into the database that can be asked by the user.

To make an advanced chatbot we’ve to code more and more but I tried to make a simple chatbot with a few lines of code and queries which help you to get an idea about how a chatbot actually works.

On the webpage for this chatbot, there is a chat form with an input field and a button labeled “send” for typing a message and sending it to the bot. If you ask the bot a question, and if the query exists in the database, the bot instantly replies with a message based on your query; if the query does not match any database queries, the bot replies with a message labeled “Sorry, we can’t understand you!”

In this chatting process, the webpage isn’t reloaded because I used jQuery (Ajax) for that. If you’re feeling difficult to understand what I am saying. You can watch a full video tutorial on this program [Simple Chatbot using PHP].

Video Tutorial of Simple Chatbot using PHP

In the video, you have seen how this chatbot looks and how it gives a reply according to the user query. If you know basic HTML, CSS, PHP & jQuery then you can easily understand the codes behind creating this chatbot. In this video, I have just made a chatbot form where chats are static but in part -2 of this video, I have done the PHP and jQuery codes of this program and made it dynamic.

In that part -2 video, to make this chatbot dynamic, I just created a database and a table in MySQL and inserted some queries and replies into it and with the help of PHP and Ajax, I retrieved the data (replies) in the chat form according to the user query.

You might like this:

Simple Chatbot using PHP with MySQL [Source Codes]

To create this program [Simple Chatbot using PHP]. First, you need to create three Files two PHP Files and another one CSS Files. After creating these files just paste the following codes in your file.

Remember that, if you’re going to download code files, you’ve to create a database name “bot”, and table name “chatbot”, and inside this table, you’ve to create three rows (id, queries, replies). Otherwise, you can replace the name of the database, table, and table rows with your database table details in my given files.

  • id type int(11) auto_increment
  • queries type varchar(300)
  • replies type varchar(300)

First, create a PHP file with the name bot.php and paste the given codes into your PHP file. Remember, you’ve to create a file with .php extension.

<!-- Created By CodingNepal -->
<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Simple Chatbot in PHP | CodingNepal</title>
    <link rel="stylesheet" href="style.css">
    <link rel="stylesheet" href=""/>
    <script src=""></script>
    <div class="wrapper">
        <div class="title">Simple Online Chatbot</div>
        <div class="form">
            <div class="bot-inbox inbox">
                <div class="icon">
                    <i class="fas fa-user"></i>
                <div class="msg-header">
                    <p>Hello there, how can I help you?</p>
        <div class="typing-field">
            <div class="input-data">
                <input id="data" type="text" placeholder="Type something here.." required>
                <button id="send-btn">Send</button>

            $("#send-btn").on("click", function(){
                $value = $("#data").val();
                $msg = '<div class="user-inbox inbox"><div class="msg-header"><p>'+ $value +'</p></div></div>';
                // start ajax code
                    url: 'message.php',
                    type: 'POST',
                    data: 'text='+$value,
                    success: function(result){
                        $replay = '<div class="bot-inbox inbox"><div class="icon"><i class="fas fa-user"></i></div><div class="msg-header"><p>'+ result +'</p></div></div>';
                        // when chat goes down the scroll bar automatically comes to the bottom

Second, create a CSS file with the name of style.css and paste the given codes in your CSS file. Remember, you’ve to create a file with .css extension.

@import url(';300;400;500;600;700&display=swap');
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    display: grid;
    height: 100%;
    place-items: center;

    color: #fff;
    background: #007bff;

    width: 3px;
    border-radius: 25px;
    background: #f1f1f1;
    background: #ddd;
    background: #ccc;

    width: 370px;
    background: #fff;
    border-radius: 5px;
    border: 1px solid lightgrey;
    border-top: 0px;
.wrapper .title{
    background: #007bff;
    color: #fff;
    font-size: 20px;
    font-weight: 500;
    line-height: 60px;
    text-align: center;
    border-bottom: 1px solid #006fe6;
    border-radius: 5px 5px 0 0;
.wrapper .form{
    padding: 20px 15px;
    min-height: 400px;
    max-height: 400px;
    overflow-y: auto;
.wrapper .form .inbox{
    width: 100%;
    display: flex;
    align-items: baseline;
.wrapper .form .user-inbox{
    justify-content: flex-end;
    margin: 13px 0;
.wrapper .form .inbox .icon{
    height: 40px;
    width: 40px;
    color: #fff;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    font-size: 18px;
    background: #007bff;
.wrapper .form .inbox .msg-header{
    max-width: 53%;
    margin-left: 10px;
.form .inbox .msg-header p{
    color: #fff;
    background: #007bff;
    border-radius: 10px;
    padding: 8px 10px;
    font-size: 14px;
    word-break: break-all;
.form .user-inbox .msg-header p{
    color: #333;
    background: #efefef;
.wrapper .typing-field{
    display: flex;
    height: 60px;
    width: 100%;
    align-items: center;
    justify-content: space-evenly;
    background: #efefef;
    border-top: 1px solid #d9d9d9;
    border-radius: 0 0 5px 5px;
.wrapper .typing-field .input-data{
    height: 40px;
    width: 335px;
    position: relative;
.wrapper .typing-field .input-data input{
    height: 100%;
    width: 100%;
    outline: none;
    border: 1px solid transparent;
    padding: 0 80px 0 15px;
    border-radius: 3px;
    font-size: 15px;
    background: #fff;
    transition: all 0.3s ease;
.typing-field .input-data input:focus{
    border-color: rgba(0,123,255,0.8);
.input-data input::placeholder{
    color: #999999;
    transition: all 0.3s ease;
.input-data input:focus::placeholder{
    color: #bfbfbf;
.wrapper .typing-field .input-data button{
    position: absolute;
    right: 5px;
    top: 50%;
    height: 30px;
    width: 65px;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    outline: none;
    opacity: 0;
    pointer-events: none;
    border-radius: 3px;
    background: #007bff;
    border: 1px solid #007bff;
    transform: translateY(-50%);
    transition: all 0.3s ease;
.wrapper .typing-field .input-data input:valid ~ button{
    opacity: 1;
    pointer-events: auto;
.typing-field .input-data button:hover{
    background: #006fef;

Last, create a PHP file with the name message.php and paste the given codes into your PHP file. Remember, you’ve to create a file with .php extension.

<!-- Created By CodingNepal -->
// connecting to database
$conn = mysqli_connect("localhost", "root", "", "bot") or die("Database Error");

// getting user message through ajax
$getMesg = mysqli_real_escape_string($conn, $_POST['text']);

//checking user query to database query
$check_data = "SELECT replies FROM chatbot WHERE queries LIKE '%$getMesg%'";
$run_query = mysqli_query($conn, $check_data) or die("Error");

// if user query matched to database query we'll show the reply otherwise it go to else statement
if(mysqli_num_rows($run_query) > 0){
    //fetching replay from the database according to the user query
    $fetch_data = mysqli_fetch_assoc($run_query);
    //storing replay to a varible which we'll send to ajax
    $replay = $fetch_data['replies'];
    echo $replay;
    echo "Sorry can't be able to understand you!";


That’s all, now you’ve successfully created a Simple Chatbot using PHP with MySQL & jQuery (Ajax). If your code doesn’t work or you’ve faced any error/problem then please download the source code files from the given download button. It’s free and a .zip file will be downloaded then you’ve to extract it.


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  1. I downloaded and deployed this chatbot; the only problem is the SQL LIKE operator and how it selects results. When speaking about selecting the values, I’ve read up on how multiple different data types can determine whether rather specific criteria have been met. For example, if I search for the name %jon%, the results will show any record with the attributes Jon; the issue here is when I type in non-specific terms such as multiple values. As a result, the code will not recognize the response. I have tried to change the SQL statements to the LIKE “%search_variable%.” to:

    “search_variable%” (starts with query) or “%search_variable” (ends with query)

    Still, I am having issues when asking complex or multi-variable responses such as “hi, how are you?” or “I am having troubles with my account” what I am trying to achieve is when these types of queries are asked, I need to filter the question by word inside entire query such as “account” when the user is asking about the account. Currently, the results are only being displayed by specific instances such as “fun” or “funny” I cannot type in “that was funny”; I have to type in “funny” or “fun” specifically with nothing else in the query. Any help would be greatly appreciated.

  2. Hi, sorry but I have an question, or an error,
    every time I type my queries and hit send, the bot say Error
    I downloaded the code itself and its the same, when I open message.php it say “Error line 6. text undefined” as I said I even tried the source code and its the same. Error every time. what should I do?

    • Simply, put the success codes inside a setTimeout function:
      setTimeout(() => {
      // codes that are inside success function
      }, 1000); // 1000 milliseconds = 1 second

  3. **Hello, thank you for the excellent explanation. I just want how to make it in Arabic. Please I have tried all the methods. can you help me?

  4. hi, i used your project as a reference to my own chatbot. <3 my question is can my project like yours be deployed to github or heroku? thank you Godbless.

  5. An error showing
    ” //fetching reply from the database according to the user query

    $fetch_data = mysqli_fetch_assoc($run_query);

    //storing replay to a varible which we’ll send to ajax

    $replay = $fetch_data[‘replies’];
    echo $replay;
    echo “Sorry can’t be able to understand you!”;” All the above mention giving reply to hii

  6. Thank you very much sir it was really helpful☺️.Can you please let me know how do i add images,other files there so that chatbot should show info along with some images whenever we ask queries?

  7. can it be applied to work with hangouts chat? I need it to work so that it can send default alerts in addition to the functions that are pre-armed.

  8. Thanks for video man 🙂
    You should put also the 2 part here, because at the start I was angry of you … I tought you didan't made the sql part, and for me that was the most important … I had to check your Youtube for it, but if I didan't do that, probably I would disliked you … Now I comm and like to both, also subscribed 😀 … Good job !


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