Develop Reference

Submitted chat not posting and retrieving chat not working

I using the below php chat script to create chat section between two users on my web app. I am having a problem with the Ajax posting. When a user submits a chat it doesn't post or show in the chat window. I tried to inspect the error and this is the error message
Failed to load resource: the server responded with a status of 404 (Not Found)
The same error message is shown for submit.php and refresh.php.
Here's my code:
JS
//CHAT FUNCTION
var lastTimeID = 0;
$(document).ready(function() {
$('#btnSend').click( function() {
sendChatText();
$('#chatInput').val("");
});
startChat();
});
function startChat(){
setInterval( function() { getChatText(); }, 2000);
}
function getChatText() {
$.ajax({
type: "GET",
url: "refresh.php?lastTimeID=" + lastTimeID
}).done( function( data )
{
var jsonData = JSON.parse(data);
var jsonLength = jsonData.results.length;
var html = "";
for (var i = 0; i < jsonLength; i++) {
var result = jsonData.results[i];
html += '<div style="color:#' + result.color + '">(' + result.chattime + ') <b>' + result.usrname +'</b>: ' + result.chattext + '</div>';
lastTimeID = result.id;
}
$('#view_ajax').append(html);
});
}
function sendChatText(){
var chatInput = $('#chatInput').val();
if(chatInput != ""){
$.ajax({
type: "GET",
url: "submit.php?chattext=" + encodeURIComponent( chatInput )
});
}
}
chatClass.php
<?PHP
class chatClass
{
public static function getRestChatLines($id)
{
$arr = array();
$jsonData = '{"results":[';
$statement = $db->prepare( "SELECT id, usrname, color, chattext, chattime FROM chat WHERE id > ? and chattime >= DATE_SUB(NOW(), INTERVAL 1 HOUR)");
$statement->bind_param( 'i', $id);
$statement->execute();
$statement->bind_result( $id, $usrname, $color, $chattext, $chattime);
$line = new stdClass;
while ($statement->fetch()) {
$line->id = $id;
$line->usrname = $usrname;
$line->color = $color;
$line->chattext = $chattext;
$line->chattime = date('H:i:s', strtotime($chattime));
$arr[] = json_encode($line);
}
$statement->close();
$jsonData .= implode(",", $arr);
$jsonData .= ']}';
return $jsonData;
}
public static function setChatLines( $chattext, $usrname, $color) {
$statement = $db->prepare( "INSERT INTO chat( usrname, color, chattext) VALUES(?, ?, ?)");
$statement->bind_param( 'sss', $usrname, $color, $chattext);
$statement->execute();
$statement->close();
}
}
?>
submit.php
<?php
require_once( "chatClass.php" );
$chattext = htmlspecialchars( $_GET['chattext'] );
chatClass::setChatLines( $chattext, $_SESSION['usrname'], $_SESSION['color']);
?>
refresh.php
<?php
require_once( "chatClass.php" );
$id = intval( $_GET[ 'lastTimeID' ] );
$jsonData = chatClass::getRestChatLines( $id );
print $jsonData;
?>

How to get a php array index and use it in javascript

I have a PHP script that returns a latitude and longitude from the database.
Then I have a Javascript loop that loops according to the number of rows the PHP query returns and populate my data object with the logitude and latitude at a given index. The challenge now is - how do I get the index without hard coding it?
PHP
$DBhost = 'localhost';
$DBuser = 'root';
$DBpass = '';
$DBname = 'symptoms';
$con = mysqli_connect($DBhost, $DBuser, $DBpass) or die(mysql_error());
mysqli_select_db($con, $DBname);
$query = mysqli_query($con, 'SELECT latitude,longitude FROM markers') or die(mysql_error());
$longArr = array();
$latArr = array();
$count = 0;
while ($row = mysqli_fetch_array($query)) {
$lat = $row['latitude'];
$lon = $row['longitude'];
$latArr[$count] = $lat;
$longArr[$count] = $lon;
++$count;
}
JavaScript
var latArr = [];
var longArr = [];
var markersD = [];
var num = <?php echo $count ?>;
for (var i = 0; i < num; i++) {
var data = {
lat: '<?php echo $latArr[1]?>',
lon: '<?php echo $longArr[1]?>'
}
console.log(data);
}

You have to create json object via php
while($row = mysqli_fetch_array($query))
{
$json[] = array('lat' => $row['latitude'], 'lon' => $row['longitude']);
}
$json_string = json_encode($json);
=== JS ===
var data = <?php echo json_string; ?>;
console.log(data);

You can put all your coords in one array
$coords = array();
while($row = mysqli_fetch_array($query))
{
$coords[] = array(
'latitude' => $row['latitude'],
'longitude' => $row['longitude'],
)
}
and pass it to the js as a JSON object
var data = <?php echo json_encode($coords) ?>;
console.log(data);
All data you need should be available in the javascript

jquery generate events over foreach

I'm programming appointment planer and still struggling with the issue that javascript doesn't generate events and prints the code just in plain text, so at first I have one php function which fetches all appointments from the sql database and generates javascript code
<script>
function getEventData() {
<?php
function showAppointments($von, $bis){
$link = OpenDB();
try {
$query = 'SELECT termin_id, client, dateFrom, dateTill, title, descri FROM termin WHERE dateFrom BETWEEN :von AND :bis';
$statement = $link->prepare($query);
$statement->bindValue(':von', $von, PDO::PARAM_STR);
$statement->bindValue(':bis', $bis, PDO::PARAM_STR);
$statement->execute();
$row = $statement->fetchAll();
}
catch (PDOException $e) {
p($e);
}
CloseDB($link);
return $row;
}
if(empty($von) && empty($bis)) {
$von = date("Y.m.j",strtotime("monday this week"));
$bis = date("Y.m.j",strtotime("sunday this week"));
}
if(isset($_POST['last_week'])){
$von = date("Y.m.j",strtotime("previous monday"));
$bis = date("Y.m.j",strtotime("previous sunday"));
}
if(isset($_POST['next_week'])){
$von = date("Y.m.j",strtotime("next monday"));
$bis = date("Y.m.j",strtotime("next sunday"));
}
$rows = showAppointments($von, $bis);
echo "const appointments = [";
for($i = 0; $i < sizeof($rows); $i++) {
$columns = array_values($rows[$i]);
echo "[";
for($j=0; $j< sizeof($columns); $j++){
echo "'".$columns[$j]."'";
if( $j < sizeof($columns)-1) echo ",";
}
echo "]";
if( $i < sizeof($rows)-1) echo ",";
}
echo "];";
?>
then all events are generated by jquery and returned
return {
events:[
$.each(appointments, function(index, row){
eval("{'id':"+ row[0] + ",'client':"+ row[1] +",'start':" + new Date(row[2])+",'end': "+ new Date(row[3]) +",'title':'"+ row[4] +"','description':'"+ row[5] +"'}");
});
]}}
</script>
the code in foreach is printed as plain text, how can I fix the issue? it should actually print something like
{'id':1, 'start': new Date(year, month, day, 12), 'end': new Date(year, month, day, 13, 30),'title':'Lunch with Mike'}

you should try the Jquery.each outside Events and then use eval(Array.join); in JavaScript, that should work

Retrieving a JSON result

Hi I have used a code snippet from a tutorial for a chat application all of its scripts are working fine but after I tweak it to make the code work based on my requirements almost all of the scripts are working except for retrieving the conversation
The error I'm having is it doesn't retrieve the conversation from my database
here is the modified script
//Create the JSON response.
$json = '{"messages": {';
//Check to ensure the user is in a chat room.
if(!isset($_GET['chat'])) {
$json .= '"message":[ {';
$json .= '"id": "0",
"user": "Admin",
"text": "You are not currently in a chat session. <a href="">Enter a chat session here</a>",
"time": "' . date('h:i') . '"
}]';
} else {
$con3 = new PDO("mysql:host=". db_host .";dbname=db", db_username , db_password);
$con3->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$con4 = new PDO("mysql:host=". db_host .";dbname=chat_db", db_username , db_password);
$con4->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$sql5 = "SELECT * FROM users WHERE id = :rid LIMIT 1";
$stmt6=$con4->prepare($sql5);
$stmt6->bindValue( 'rid',$_POST['rid'], PDO::PARAM_STR);
$stmt6->execute();
foreach($stmt6->fetchAll()as $res)
{
$usern = $res['username'];
$user_lvl = $res['ulvl'];
}
$comb = $usern . $_POST['name'];
//Validation if msgid exists before creating a new table on the 2nd database
$sql6="SELECT msgid FROM thread WHERE combination1=:msgids OR combination2=:submsgids LIMIT 1";
$msg_id = $con4->prepare($sql6);
$msg_id->bindParam(':msgids', $comb, PDO::PARAM_STR);
$msg_id->bindParam(':submsgids', $comb, PDO::PARAM_STR);
$msg_id->execute();
$msgd = $msg_id->fetchColumn();
$tbpre = $msgd . "chat_conversation";
$sql7 = "SELECT msgid, message_content, username , message_time FROM $tblpre WHERE msgid=:chat";
$stmt7=$con3->prepare($sql7);
$stmt7->bindValue( ':chat', $msgd, PDO::PARAM_STR);
$stmt7->execute();
$message_query = $stmt7;
//Loop through each message and create an XML message node for each.
if(count($message_query) > 0) {
$json .= '"message":[ ';
while($message_array = $stmt7->fetch(PDO::FETCH_ASSOC)) {
$json .= '{';
$json .= '"id": "' . $message_array['msgid'] . '",
"user": "' . htmlspecialchars($message_array['username']) . '",
"text": "' . htmlspecialchars($message_array['message_content']) . '",
"time": "' . $message_array['message_time'] . '"
},';
}
$json .= ']';
} else {
//Send an empty message to avoid a Javascript error when we check for message lenght in the loop.
$json .= '"message":[]';
}
}
//Close our response
$json .= '}}';
echo $json;
Here is the code for calling this script
//Gets the current messages from the server
function getChatText() {
if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
receiveReq.open("GET", 'includes/getChat.php?chat='+uid+'&last=' + lastMessage, true);
receiveReq.onreadystatechange = handleReceiveChat;
receiveReq.send(null);
}
}
function sendChatText() {
if (sendReq.readyState == 4 || sendReq.readyState == 0) {
sendReq.open("POST", 'includes/getChat.php?last=' + lastMessage, true);
sendReq.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
sendReq.onreadystatechange = handleSendChat;
var param = 'message=' + document.getElementById('txtA').value;
param += '&name='+user;
param += '&uid='+uid;
param += '&rid='+document.getElementById('trg').value;
sendReq.send(param);
document.getElementById('txtA').value = '';
}
}
//When our message has been sent, update our page.
function handleSendChat() {
//Clear out the existing timer so we don't have
//multiple timer instances running.
clearInterval(mTimer);
getChatText();
}
function handleReceiveChat() {
if (receiveReq.readyState == 4) {
//Get a reference to our chat container div for easy access
var chat_div = document.getElementById('clog');
var response = eval("(" + receiveReq.responseText + ")");
for(i=0;i < response.messages.message.length; i++) {
chat_div.innerHTML += response.messages.message[i].user;
chat_div.innerHTML += ' <font class="chat_time">' + response.messages.message[i].time + '</font><br />';
chat_div.innerHTML += response.messages.message[i].text + '<br />';
chat_div.scrollTop = chat_div.scrollHeight;
lastMessage = response.messages.message[i].id;
}
mTimer = setTimeout('getChatText();',20000); //Refresh our chat in 2 seconds
}
}
Am I missing something here or doing something wrong?

You should rewrite using json_encode:
$messages = array();
//Check to ensure the user is in a chat room.
if(!isset($_GET['chat'])) {
$message_object = (object) array(
"id"=>"0",
"user"=>"Admin",
"text"=>"You are not currently in a chat session. <a href=\"\">Enter a chat session here</a>",
"time"=>date('h:i')
);
$messages[] = (object) array("message"=>$message_object);
} else {
$con3 = new PDO("mysql:host=". db_host .";dbname=db", db_username , db_password);
$con3->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$con4 = new PDO("mysql:host=". db_host .";dbname=chat_db", db_username , db_password);
$con4->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$sql5 = "SELECT * FROM users WHERE id = :rid LIMIT 1";
$stmt6=$con4->prepare($sql5);
$stmt6->bindValue( 'rid',$_POST['rid'], PDO::PARAM_STR);
$stmt6->execute();
foreach($stmt6->fetchAll()as $res)
{
$usern = $res['username'];
$user_lvl = $res['ulvl'];
}
$comb = $usern . $_POST['name'];
//Validation if msgid exists before creating a new table on the 2nd database
$sql6="SELECT msgid FROM thread WHERE combination1=:msgids OR combination2=:submsgids LIMIT 1";
$msg_id = $con4->prepare($sql6);
$msg_id->bindParam(':msgids', $comb, PDO::PARAM_STR);
$msg_id->bindParam(':submsgids', $comb, PDO::PARAM_STR);
$msg_id->execute();
$msgd = $msg_id->fetchColumn();
$tbpre = $msgd . "chat_conversation";
$sql7 = "SELECT msgid, message_content, username , message_time FROM $tblpre WHERE msgid=:chat";
$stmt7=$con3->prepare($sql7);
$stmt7->bindValue( ':chat', $msgd, PDO::PARAM_STR);
$stmt7->execute();
$message_query = $stmt7;
//Loop through each message and create an XML message node for each.
if(count($message_query) > 0) {
$message_object = (object) array(
"id"=>$message_array['msgid'],
"user"=>htmlspecialchars($message_array['username']),
"text"=>htmlspecialchars($message_array['message_content']),
"time"=>$message_array['message_time'
);
$messages[] = (object) array("message"=>$message_object);
} else {
//Send an empty message to avoid a Javascript error when we check for message lenght in the loop.
$messages[] = (object) array("message"=>array());
}
}
//Close our response
$result = (object) array('messages'=>$messages);
$json = json_encode($result);
echo $json;

XML not parsing in jQuery

When I try to parse my PHP-generated XML file using the jQuery Feeds plugin, it doesn't do what it's supposed to - loop through the template below and output the XML <title> tag in the place of <!=title!>. Instead, it returns just one instance of the template with nothing in place of <!=title!>.
Nothing is returned in the Chrome JavaScript console.
Strangely, I have a similar PHP-generated XML file that works just fine.
Here's the jQuery I'm using:
$('.feed').feeds({
feeds: {
feed1: 'http://www.comfyshoulderrest.com/scrape.php?id=1' // this one doesn't work
},
//max: 3,
loadingTemplate: '<h1 class="feeds-loader">Loading items...</h1>',
entryTemplate: '<div class="item"><div class="image"><img src="images/tie.jpg" style="width: 100%;"></div>' +
'<div class="text"><ul class="list-inline">' +
'<li><span class="price text-warning"><strong>£7.00</strong></span> <span class="text-muted"><strike>£14.00</strike></span></li>' +
'<li class="text-muted"><strong>Topman</strong></li></ul>' +
'<!=title!>' +
'</div></div>'
});
Here's the code that generates the XML file:
<?php
function scrape($list_url, $shop_name, $photo_location, $photo_url_root, $product_location, $product_url_root, $was_price_location, $now_price_location, $gender, $country) {
header("Content-Type: application/xml; charset=UTF-8");
$xml = new SimpleXMLElement('<rss/>');
$xml->addAttribute("version", "2.0");
$channel = $xml->addChild("channel");
$channel->addChild("product_url", $product_url);
$channel->addChild("shop_name", $shop_name);
$channel->addChild("photo_url", $photo_url);
$channel->addChild("was_price", $was_price);
$channel->addChild("now_price", $now_price);
$html = file_get_contents($list_url);
$doc = new DOMDocument();
libxml_use_internal_errors(TRUE);
if(!empty($html)) {
$doc->loadHTML($html);
libxml_clear_errors(); // remove errors for yucky html
$xpath = new DOMXPath($doc);
/* FIND LINK TO PRODUCT PAGE */
$products = array();
$row = $xpath->query($product_location);
/* Create an array containing products */
if ($row->length > 0)
{
foreach ($row as $location)
{
$product_urls[] = $product_url_root . $location->getAttribute('href');
}
}
$imgs = $xpath->query($photo_location);
/* Create an array containing the image links */
if ($imgs->length > 0)
{
foreach ($imgs as $img)
{
$photo_url[] = $photo_url_root . $img->getAttribute('src');
}
}
$result = array();
/* Create an associative array containing all the above values */
foreach ($product_urls as $i => $product_url)
{
$result = array(
'product_url' => $product_url,
'shop_name' => $shop_name,
'photo_url' => $photo_url[$i]
);
$item = $channel->addChild("item");
$item->addChild("product_url", $result['product_url']);
$item->addChild("shop_name", $result['shop_name']);
$item->addChild("photo_url", $result['photo_url']);
}
//print_r($result);
}
else
{
echo "this is empty";
}
echo $xml->asXML();
}
/* CONNECT TO DATABASE */
$dbhost = "xxx";
$dbname = "xxx";
$dbuser = "xxx";
$dbpass = "xxx";
$con = mysqli_connect("$dbhost", "$dbuser", "$dbpass", "$dbname");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$id = $_GET['id'];
/* GET FIELDS FROM DATABASE */
$result = mysqli_query($con, "SELECT * FROM scrape WHERE id = '$id'");
while($row = mysqli_fetch_array($result)) {
$list_url = $row['list_url'];
$shop_name = $row['shop_name'];
$photo_location = $row['photo_location'];
$photo_url_root = $row['photo_url_root'];
$product_location = $row['product_location'];
$product_url_root = $row['product_url_root'];
$was_price_location - $row['was_price_location'];
$now_price_location - $row['now_price_location'];
$gender = $row['gender'];
$country = $row['country'];
scrape($list_url, $shop_name, $photo_location, $photo_url_root, $product_location, $product_url_root, $was_price_location, $now_price_location, $gender, $country);
}
mysqli_close($con);
?>