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POCreating a client for a chat in PHP
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  1. POCreating a client for a chat in PHP
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    copied!<p>I'm trying to create a <code>PHP</code> chat, so I have <code>server.php</code> that starts the server on the terminal, which is listen to <code>client</code> connections:</p> <pre><code>&lt;?php function chat_leave( $sock, $chat_id = 0 ) { if( $chat_room_id[ $chat_id ] ) { unset( $chat_room_id[ $chat_id ] ); return true; } socket_close($sock); return false; } function client( $input ) { /* Simple php udp socket client */ //Reduce errors error_reporting(~E_WARNING); $server = '127.0.0.1'; $port = 9999; if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0))) { $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Couldn't create socket: [$errorcode] $errormsg \n"); } //Communication loop while(1) { //Send the message to the server if( ! socket_sendto($sock, $input , strlen($input) , 0 , $server , $port)) { $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Could not send data: [$errorcode] $errormsg \n"); } //Now receive reply from server and print it if(socket_recv ( $sock , $reply , 2045 , MSG_WAITALL ) === FALSE) { $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Could not receive data: [$errorcode] $errormsg \n"); } return $reply; } } /* * chat_join * a new user joins the chat * @username: String * @password: String * * add a new listener to the server * */ function chat_join( $username = "", $password = "" ) { $users = array( "batman" =&gt; "batman123", "robin" =&gt; "robin123", "joe" =&gt; "joe123" ); if( $users[$username] == $password ) { return true; } return false; } function main() { $chat_room_id = array(); $username = stripslashes( $_POST['username'] ); $password = stripslashes( $_POST['password'] ); $action = stripslashes( $_POST['action'] ); $port = intval( $_POST['port'] ); $domain = stripslashes( $_POST['domain'] ); $chat_id = intval( $_POST['chat_room_id'] ); if( strcmp( $action, "login" ) == 0 ) { $status = chat_join( $username, $password ); if( $status ) { $chat_room_id[] = $chat_id; echo json_encode( $status ); } } else if( strcmp( $action, "chat" ) == 0 ) { $msg = stripslashes( $_POST['message'] ); // take the message, send through the client $reply = client( $msg ); echo json_encode( $reply ); } else if( strcmp( $action, "logout") == 0 ) { } else { echo json_encode( false ); } return; } main(); ?&gt; </code></pre> <p>The function <code>client()</code> is the code I have from a <code>client.php</code> file, which when I execute on the terminal, is able to send and receive messages from the <code>server.php</code>. Now I would like to use my <code>main.php</code> file, so once the user is logged in he will send messages to the server, which will reply back the messages that user haven't seen. When I run <code>server.php</code> and <code>client.php</code> from two different terminals, I'm able to send and receive messages, however I would like to do that using <code>main.php</code>, transform that reply message into a <code>JSON</code> object and send back to the <code>html</code> page where it will get appended to a <code>textarea</code> box. My problem is: how can I get the reply that <code>client.php</code> received and send it back to the html page? When I execute it on the terminal, I have:</p> <pre><code>Enter a message to send : hello Reply : hello </code></pre> <p>I use <code>AJAX</code> to send the user input in the chat, so I wanted to be able to take that message, and send it to the server, which I started on the terminal and take the reply back and forward to the webpage and append that to the text box area. How can I accomplish that? Should I start <code>client.php</code> as a service through <code>main.php</code>? Or should I use the <code>client($input)</code> function to send a message and then return what it sends, back? However, I wanted that <code>client</code> to be running until the use logs out, because other clients may connect to the chat. How can I accomplish that is kind of fuzzy for me. The code in <code>client( $input )</code> is the same as in <code>client.php</code>.</p>
 

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