Echo "Username non inserito"
Ciao a tutti.
Ho inserito questa chat nel mio sito, ma se uno non inserisce il nickname va lo stesso.
Ci sono 3 pag:
index.php
Codice PHP:
<?php
session_start();
function createForm(){
?>
<form action="<?php echo $_SERVER['../../chat/PHP_SELF']; ?>" method="post">
<table align="center">
<tr><td>Per chattare inserisci un nickname:</td>
<td><input class="text" type="text" name="name" /></td></tr>
<tr><td colspan="2" align="center">
<input class="text" type="submit" name="submitBtn" value="Login" />
</td></tr>
</table>
</form>
<?php
}
if (isset($_GET['u'])){
unset($_SESSION['nickname']);
}
// Process login info
if (isset($_POST['submitBtn'])){
$name = isset($_POST['name']) ? $_POST['name'] : "Anonimo";
$_SESSION['nickname'] = $name;
}
$nickname = isset($_SESSION['nickname']) ? $_SESSION['nickname'] : "Hidden";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Chat</title>
<link href="style/style.css" rel="stylesheet" type="text/css" />
<script language="javascript" type="text/javascript">
<!--
var httpObject = null;
var link = "";
var timerID = 0;
var nickName = "<?php echo $nickname; ?>";
// Get the HTTP Object
function getHTTPObject(){
if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");
else if (window.XMLHttpRequest) return new XMLHttpRequest();
else {
alert("Your browser does not support AJAX.");
return null;
}
}
// Change the value of the outputText field
function setOutput(){
if(httpObject.readyState == 4){
var response = httpObject.responseText;
var objDiv = document.getElementById("result");
objDiv.innerHTML += response;
objDiv.scrollTop = objDiv.scrollHeight;
var inpObj = document.getElementById("msg");
inpObj.value = "";
inpObj.focus();
}
}
// Change the value of the outputText field
function setAll(){
if(httpObject.readyState == 4){
var response = httpObject.responseText;
var objDiv = document.getElementById("result");
objDiv.innerHTML = response;
objDiv.scrollTop = objDiv.scrollHeight;
}
}
// Implement business logic
function doWork(){
httpObject = getHTTPObject();
if (httpObject != null) {
link = "message.php?nick="+nickName+"&msg="+document.getElementById('msg').value;
httpObject.open("GET", link , true);
httpObject.onreadystatechange = setOutput;
httpObject.send(null);
}
}
// Implement business logic
function doReload(){
httpObject = getHTTPObject();
var randomnumber=Math.floor(Math.random()*10000);
if (httpObject != null) {
link = "message.php?all=1&rnd="+randomnumber;
httpObject.open("GET", link , true);
httpObject.onreadystatechange = setAll;
httpObject.send(null);
}
}
function UpdateTimer() {
doReload();
timerID = setTimeout("UpdateTimer()", 5000);
}
function keypressed(e){
if(e.keyCode=='13'){
doWork();
}
}
//-->
</script>
</head>
<body onLoad="UpdateTimer();">
<div id="main">
<div id="caption">Chat</div>
<div id="icon"> </div>
<?php
if (!isset($_SESSION['nickname']) ){
createForm();
} else {
$name = isset($_POST['name']) ? $_POST['name'] : "Anonimo";
$_SESSION['nickname'] = $name;
?>
<div id="result">
<?php
$data = file("msg.html");
foreach ($data as $line) {
echo $line;
}
?>
</div>
<div id="sender" onKeyUp="keypressed(event);">
<input type="text" name="msg" size="45" id="msg" />
<button onClick="doWork();">Invia</button>
</div>
<?php
}
?>
</div>
</body>
message.php
Codice PHP:
<?php
if (isset($_GET['msg'])){
if (file_exists('msg.html')) {
$f = fopen('msg.html',"a+");
} else {
$f = fopen('msg.html',"w+");
}
$nick = isset($_GET['nick']) ? $_GET['nick'] : "Hidden";
$msg = isset($_GET['msg']) ? htmlspecialchars($_GET['msg']) : ".";
$line = "<p><span class=\"name\">$nick: </span><span class=\"txt\">$msg</span></p>";
fwrite($f,$line."\r\n");
fclose($f);
echo $line;
} else if (isset($_GET['all'])) {
$flag = file('msg.html');
$content = "";
foreach ($flag as $value) {
$content .= $value;
}
echo $content;
}
?>
msg.php che contiene i messaggi inviati.
quello che vorrei fare č nella pagina index.php: rendere impossibile continuare se non si ha inserito il nickname.
Ho provato con questo, ma niente...
Codice HTML:
<SCRIPT LANGUAGE="JavaScript">
function ver()
{
for (i=0; i<document.forms[0].elements.length; ++i)
if(document.forms[0].elements[i].value == "")
{
alert("Inserire username e password!");
document.forms[0].elements[i].focus();
return false;
}
return true;
}
</SCRIPT>
Grazie!
