How to write chat program in php

how to write chat program in php

Simple Chat Engine Using HTML5(Server Sent Events) And PHP

May 07,  · DB variables var $sDbName; var $sDbUser; var $sDbPass; // constructor function SimpleChat() { //mysql_connect("localhost","username","password"); $this->sDbName = 'database_name'; $this->sDbUser = 'username'; $this->sDbPass = 'password'; } // adding to DB table posted message . Feb 15,  · { function send($message) { global $clientSocketArray; $messageLength = strlen($message); foreach($clientSocketArray as $clientSocket) { @socket_write($clientSocket,$message,$messageLength); } return true; } function unseal($socketData) { $length = ord($socketData[1]) & ; if($length == ) { $masks = substr($socketData, 4, 4); $data = substr($socketData, 8); } elseif($length == ) { $masks = substr($socketData, 10, 4); $data = substr($socketData, 14); } else.

This article is a tutorial on how to create a simple chat application that uses AJAX programm send and receive live messages entered in a chat box without having to reload the page. The article describes each PHP script that is used to exchange message between users one to one or as in a chat room system. The messages exchanged between users are stored in a MySQL database. Here you may find the complete chqt code of a PHP package for implementing this chat service.

Here is a screenshot of a PHP chat system page that you can create following the how to write chat program in php described in this tutorial:. Every chat room needs to keep the content of the chat lines stored somewhere. Some solutions use sessions, others use text files, but the most robust solutions use a database.

So next time when you chat with some how to treat cat colds, keep in mind it is saved somewhere there. For a simple chat room system we will need just one table, it stores the nickname of the user, what he said and the time when he said it.

It is also useful to have something to distinguish what each user said. My proposal is to have a color field so we can show each user chat lines in a different way. I arite named the table "chat" for obvious reasons.

It contains an ID field which is the primary key and so it is auto-incremented, a nickname, color and chattext fields, strings with different lengths. The chattime field is a timestamp field for which MySQL will set as default pogram to the current time. This is how we know when the chat line have been submitted. Every good chat system has some kind of user management system. In our case we have just a user name. It is not complete solution but it what does the song raspberry beret mean enough for the purposes of this tutorial.

When a user comes to the chat room page he needs to have a user name, so first we need to give him a way to choose one. Later we need to how long can you keep fresh fish in the refrigerator this user name, so we do not need to ask him to enter his name every time he sends a message.

That is why we will use sessions. Here we create two sections in the frontend file: one for login and the other for chat. When the user comes for the first time, he will not have a user name in the session, and he will get a form to write down his user name and choose a color. When he submits the login form, the browser will be redirected to the chat screen. It is the same URL but the user sees one section a time. Login section consists of two parts. The form on which the user provides his user name and color.

Then he submits the form which will be handled by a script to set the session. After the browser returns to the first page again but now showing the chat interface instead of the login form.

Let us create the first section with a script file named index. We need to start the session before we print anything on the screen. After that a simple test, if the user has not registered his user name in the session we will show the form. If he did go through the login form, ho show what is after the "else" keyword.

Now it is empty but later we will add code there. Very simple, one table in a form with two fields: nickname and color. The user enters a user name and chooses a color from the dropdown select element.

Then clicks on submit button that will submit the form to the login. Now let us create a simplified version of the login. We progrram not fully validating the submitted values here for simplification reasons, but for security sake it is wise to assure the submitted values are valid.

We will do that many times. Cgat some basic filtering of the user name and color provided via the form, and assign the values to session variables. Then we redirect the user back to index. This time we have a session set with the user name value, so the if statement will activate the second part of the script this progeam. The second interface of this application is the chat window itself.

We need to copy chaf code to the last part of the index. We will use AJAX to retrieve the new chat line entries from the database and to submit new chat lines. No user likes to have the page to refresh every couple of seconds to update the chat text.

Older chat systems used a frame or flash. Using AJAX we can update the chat lines faster without reloading the page. First include jquery script in the header, then main. I made two DIV sections, one to hold the chat window, and the other to progra, the text box for the user to write what he wants to say.

An important file for the chat system is main. This is where our AJAX requests are how to create help file processed. We have three functions and one event listener. Copy this code in main. This chat application will retrieve the chat status every two seconds, but we do not want to retrieve all the past chat lines every time.

We already retrieved the newest ones, so we need a way to track which lines were retrieved for the last time. As you may remember when we created the database table we added a primary key field named ID that is auto-incremented.

We use that field value to track which line we have seen last. When the page is fully loaded, we register a click event listener to our button "btnSend". Whenever it is clicked we call chaat function sendChatText function which is explained below. Also when the page is loaded we need to initiate the application. We will use startChat function for that. It will use setInterval to evaluate a function call every two seconds as it was mentioned above. We need our chat window to be refreshed every two seconds to see what other users wrote.

We use the getChatText to retrieve hiw new chat lines. It gets as response JSON encoded data with the new chat lines. Nowadays we use JSON to receive an array of data. In the past we used comma-separated values to return arrays back, but it was harder to encode and decode. Now we get an object ho we can process easily. By looping through the received JSON data we got the values of user name, color, chat time and chat text.

That information is used to properly display in our chat window. We also get the ID of every line, so we can keep track of which line was the last. With these details we create HTML code which shows a chat line to be appended in our chat window. This function will read back chat lines and show them in our chat window. Now we need a function to let the user participate in the chat.

For that we use sendChatText function I mentioned before. We use it to send the text the user writes in the text box. Every time the user clicks on send button, this function is called to send the new chat text using an AJAX rquest to script submit.

That script will save the new chat text in the database, to be retrieved as a new line for the current user and also the other users in the same chat room. The backend are the server side PHP helper scripts that call the class. The helper scripts handle the AJAX requests and call the class. We have two helper scripts, as mentioned before. We have refresh. The first helper script is refresh. Then the script outputs that as response to the AJAX requests. The chqt below is refresh.

Second helper script is submit. It receives the chat text from AJAX and passes to static class method along with the what does the i mean in bmw models name and color from the session.

The new data is inserted in the database. Below follows submit. Another file we need to create is config. To connect to the database we need login information, so use constant values defined separately with MySQL connection values like the server name, database name, MySQL username and password.

In this class we have only two methods: one to retrieve chat lines from the database named getRestChatLines. The other is to insert new chat lines to the database named as setChatLines.

The queried chat lines must all be newer uow our last chat line, and must not be older than one hour. We are limiting it to one hour to avoid causing excessive load to the server.

The results are sorted in an array, and returned back as a JSON encoded data. Notice that the timestamp is converted to a readable time format.

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session_start(); //Create a session of username and logging in the user to the chat room. if(isset($_POST['username'])){. $_SESSION['username']=$_POST['username']; } //Unset session and logging out user from the chat room. if(isset($_GET['logout'])){. unset($_SESSION['username']); header('');. Inside of your new stream-chat-php directory, create the following files: - this will contain our JavaScript code; - this will contain our chat interface; - this will contain our chat server logic; - this will contain our chat styling; Generating Tokens. While it is still young, several very interesting applications have been coded in it. The people setup a chat program (not WebSockets) the source of which has been made available. That would be a very good place to start if not wanting to write it from scratch. There is a PHP WebSocket implementation. Depending on your requirements it.

Creating a Stream Account. Creating the Project. Creating the Chat Interface. Making Our App Beautiful. Getting a User's ID. Appending New Messages. Juggling New and Old Messages. Building a fully functional and scalable chat platform is time-consuming. Luckily, Stream can help you build one in minutes! You'll also want to make sure you have PHP and Composer installed on your system. To check if you already have PHP installed on your system, run this command in your terminal:.

To be able to use the Stream API, you'll need to create an account. Take note of these keys, as we will be using them in a bit:. Now that we've gathered all of our "tools", create a folder named stream-chat-php in the directory where you store your code; this will be the home for all of our project files.

Inside of your new stream-chat-php directory, create the following files:. To start, open your terminal and cd into your project root directory stream-chat-php , then install the PHP SDK using composer:. On the prompt that appears - No composer. Now that we have the SDK installed, we can add the following to the server. You are welcome to add your own flair to your app, but you can get started by adding the following to the style.

Let's get started with the client side of our app by initializing the Javascript SDK! Add the below code to your custom. Then, add the below function to the custom.

Each user needs to have a unique id that we can use to identify them. Add the below code to the custom. The above allows us to display the chat page and initalize the JavaScript SDK when an valid user enters their username and password. To trigger this, we'll need to listen for when the user hits Enter ; add the code below to the custom.

In order to add each new message that comes in to the chat, add the below function to the custom. This function will take in the message payload that contains the user's username and message , create a new Node element that holds the username and message , and then attach the message to the page using the message 's id.

Let's start by listening for new messages coming to the channel! Add the below code to the initializeClient username function at the top of custom. Now, what about old messages on the channel already? We need to render those as well To accomplish this, add the following to the initializeClient function:.

So far, we can see previous messages and new messages added to the channel. Next, we will add functionality to allow users to send a new message to the channel. Next, listen for the message-input and for when the user hits Enter , so we can send the message to the channel:. There are lots of amazing chat features that you can add to your chat, like the "is typing" indicator, online presence, and much more!

Blog Home Tutorials Chat. Table of Contents Prerequisites. Take note of these keys, as we will be using them in a bit: Creating the Project Now that we've gathered all of our "tools", create a folder named stream-chat-php in the directory where you store your code; this will be the home for all of our project files.

Inside of your new stream-chat-php directory, create the following files: custom. To start, open your terminal and cd into your project root directory stream-chat-php , then install the PHP SDK using composer: On the prompt that appears - No composer. Now that we've initiated the code for our server, we can start up the server by running: Creating the Chat Interface Add the below code to the page.

In the UI, that will look something like this: Juggling New and Old Messages Let's start by listening for new messages coming to the channel! To accomplish this, add the following to the initializeClient function: Sending Messages So far, we can see previous messages and new messages added to the channel. Add the below function to the custom. Type in a username and hit Enter , in each. Exchange messages! Please reach out and share your incredible creations with us; until then, happy coding!

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