Develop Reference

Update Database with javascript variable/ transfare javascript variable to php

I want to Update my database with a variable from javascript.
This is my javascript code i want the testusersGeld variable to transfare over to php.
var testusersGeld = 111;
var sendUsersGeld = new XMLHttpRequest();
sendUsersGeld.open("POST", "usersGeldSenden.inc.php");
sendUsersGeld.setRequestHeader("Content-Type", "application/json");
sendUsersGeld.send(testusersGeld);
and this is my php code:
<?php
session_start();
$requestPayload = file_get_contents("php://input");
$object = json_decode($requestPayload);
var_dump($object);
if(isset($_POST['update']))
{
require_once 'includes\dbh.inc.php';
$query = "UPDATE users SET usersGeld='".$object."' WHERE usersName LIKE '{$_SESSION["usersName"]}'";
$result = mysqli_query($conn, $query );
if($result)
{
echo 'Data Updated';
}else{
echo 'Data Not Updated';
}
mysqli_close($conn);
}
When i var_dump than i can see the 111 but when i try to echo it out it wont work. The part of Update works when i use another variable.

JAVA SCRIPT var with Double Quotes to PHP and back for Auto fill

I have an HTML/PHP form that uses JAVA SCRIPT function to send (POST) an input content to a PHP code which performs a query and gets back to the JAVA SCRIPT function with data to Auto fill additional inputs in the form.
It all works great when the input content i send is plain text, even if there is a single quote in the content it works.
BUT, as soon as double quotes are included in the input content it fails to return the Auto fill results.
Appreciate your help with indicating where do i fail with passing the quotes.
Thanks
Just to make it clearer, the code works if customer name is "Intel" or "Int'el" , but it fails when customer name is "Int"el"
Here is the JAVA SCRIPT function that sends and receive the data from the PHP:
!--Script Auto fill ltd by customer -->
<script type="text/javascript">
function updatefrm() {
setTimeout(function(){
var customer = $('#customer').val();
if ($.trim(customer) !='') {
$.post('customerfill.php', {customer: customer}, function(data) {
$('#customerupdate').val(data['customer']);
$('#ltdupdate').val(data['ltd']);
});
}
}, 10);
}
</script>
Here is the PHP code that gets the POST data , performs the query, and sends back the array for the JAVA SCRIPT auto fill:
<?php
if (!empty($_POST['customer'])) {
$DB_Server = "localhost"; // MySQL Server
$DB_Username = "XXXX"; // MySQL Username
$DB_Password = "XXXX"; // MySQL Password
$DB_DBName = "XXXXXXXX"; // MySQL Database Name
$Connect = #mysql_connect($DB_Server, $DB_Username, $DB_Password) or die("Failed to connect to MySQL:<br />" . mysql_error() . "<br />" . mysql_errno());
// Select database
$Db = #mysql_select_db($DB_DBName, $Connect) or die("Failed to select database:<br />" . mysql_error(). "<br />" . mysql_errno());
mysql_query('SET NAMES utf8');
mysql_query('SET CHARACTER SET utf8');
$safe_name = mysql_real_escape_string(trim($_POST['customer']));
$query = mysql_query(" SELECT * FROM customers WHERE customer = '". $safe_name ."' LIMIT 1 ");
if (mysql_num_rows($query) > 0) {
$row = mysql_fetch_assoc($query);
json($row);
} else {
json(null);
}
}
function json ($array) {
header("Content-Type: application/json");
echo json_encode($array);
}

i think your js code is fine and i think error in your php code and in that line
$query = mysql_query(" SELECT * FROM customers WHERE customer = '". $safe_name ."' LIMIT 1 ");
so you should use PDO Prepared Statements for security and not face problem with double quote
$dsn = "mysql:host=localhost;dbname=your_database;charset=utf8mb4";
try {
$pdo = new PDO($dsn, "database_username", "database_password");
} catch (Exception $e) {
echo "no connection";
exit();
}
$stmt = $pdo->prepare("SELECT * FROM customers WHERE customer = :customer LIMIT 1");
$stmt->execute(array(":customer"=>$safe_name));
$row = $stmt->fetch();

Getting a variable from PHP to javascript (echo not updating after PHP variables change)

I'm working on a script that forms a web page based on what is in my database. For his I call a java script function when the page loads and whenever the page needs to update.
Firstly I made a script that gets the information from the database, passes it to java script by echo "var region_list = ". $js_region_list . ";\n"; and then proceeded to generate the page itself which worked.
After that I tried to get this to work based on an AJAX request but this failed horribly. As it stands I get correct information from the database but it does not change the value of echo "var region_list = ". $js_region_list . ";\n"; which prevents the page from updating.
The PHP part of my script:
if(isset($_POST["campaign_id"])){
// Get variables and sanetize
$campaign_id = preg_replace('#[^0-9]#i', '', $campaign_id);
// Create planet list
$planet_list = array();
$sql = "SELECT planet_nr, size, moon FROM planets WHERE campaign_id = $campaign_id";
if ($result = mysqli_query($db_conx, $sql)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
array_push($planet_list, array($row["planet_nr"],$row["size"],$row["moon"]));
}
/* free result set */
mysqli_free_result($result);
}
// Create region list
$region_list = array();
$sql = "SELECT planet_id, region_id, region_type, owner FROM regions WHERE campaign_id = $campaign_id";
if ($result = mysqli_query($db_conx, $sql)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
array_push($region_list, array($row["planet_id"],$row["region_id"],$row["region_type"],$row["owner"]));
}
/* free result set */
mysqli_free_result($result);
}
// Convert array's for use in java
$js_planet_list = json_encode($planet_list);
$js_region_list = json_encode($region_list);
$list = array($planet_list, $region_list);
$list = json_encode($list);
echo $list;
exit();
The javascript part:
<?php
echo "var planet_list = ". $js_planet_list . ";\n";
echo "var region_list = ". $js_region_list . ";\n";
?>
var ajax = ajaxObj("POST", "campaign.php?c="+campaign_id);
ajax.onreadystatechange = function() {
if(ajaxReturn(ajax) == true) {
if(ajax.responseText == "Fail"){
alert(ajax.responseText);
}
}
}
ajax.send("campaign_id="+campaign_id);
NOTE: These are just snippets of the whole script. The whole script is in the same PHP file with the PHP up above between it's tags and the java down between the script tags.

In your ajax success part, you need to just update the values of the the variables planet_list and region_list as shown below
planet_list = JSON.parse(ajax.responseText[0]);
region_list = JSON.parse(ajax.responseText[1]);

retrieving json data from mysql and php into jquery

I am trying to bring mysql data into jquery by using php, I get the data into a JSON format like this.
{"uid":"33","title":"Apple, Peach, Grapefruit","ing1":"apple","qty1":"1","meas1":"whole","ing2":"peaches \/ halved and","qty2":"2","meas2":"each","ing3":"grapefruit \/ peeled","qty3":"2","meas3":"each","ing4":"","qty4":"0","meas4":"each","ing5":"","qty5":"0","meas5":"each","ing6":"","qty6":"0","meas6":"each","ing7":"","qty7":"0","meas7":"each","ing8":"","qty8":"0","meas8":"each","ing9":"","qty9":"0","meas9":"each","ing10":"","qty10":"0","meas10":"each","servings":"2","benefits":""}
using this following code:
require_once'connect.php';
$uid = $_GET['uid'];
$sql = "SELECT * FROM recipes WHERE uid = '$uid'";
$result = mysqli_query($conn, $sql);
$num_rows = mysqli_affected_rows($conn);
while($row = mysqli_fetch_assoc($result)) {
$data = json_encode($row);
echo $data;
}
I am using jquery .get to pull it into the web page with this code.
$(document).ready(function(e) {
var id = location.search;
uid=id.substring(4);
$.get('../jqm_juicing/data/get_json.php?uid=' + uid,function(data, status){
$("#display").append(data);
});
});
It displays the json data as above. I would like to be able to access the different elements individually, how do I do that?

If you wrap it with <script> tags, and declare it as a variable, you will have it.
require_once'connect.php';
$uid = $_GET['uid'];
$sql = "SELECT * FROM recipes WHERE uid = '$uid'";
$result = mysqli_query($conn, $sql);
$num_rows = mysqli_affected_rows($conn);
echo "<script>";
while($row = mysqli_fetch_assoc($result)) {
$data = json_encode($row);
echo "var myJson=" . $data;
}
echo "</script>";
Now in your main page scripts, you can access this JSON like any other normal JSON.
Here is an interval that you can place anywhere in your main page scripts:
It is just to test this ;)
var checkJson = setInterval(function(){
if(typeof(myJson.uid)!="undefined"){
clearInterval(checkJson);
console.log("myJson uid: " + myJson.uid);
console.log("myJson title: " + myJson.title);
// etc...
}else{
console.log("JSON not loaded yet.");
}
},500);

Retrieve the json data to use json response jquery parse function. json data using this function
jQuery.parseJSON()
http://api.jquery.com/jquery.parsejson/

In your jQuery, add JSON.parse() before you append (data).
$(document).ready(function(e) {
var id = location.search;
uid=id.substring(4);
$.get('../jqm_juicing/data/get_json.php?uid=' + uid,function(data, status){
$("#display").append(JSON.parse(data));
});
});
I just changed this line:
$("#display").append(JSON.parse(data));
Hope this helps!

using phpfile output inside js file file as variable

Recently I am learning single page application, but I got a problem, the project I am working on is inside a folder that contain many folders, php js are folders in side the main folder, and each contain its type of files, the problem is that one of the php file called getmax.php gives me the maximum id ,I want to use this max(id) in a js file called module.js in order to give the new module the next id , the module.js should gives this id to another php file called insert.php ,the connection between the module.js and insert.php is working properly if I set the id manually . but I could not figure out how can I make it use the max(id) from the getmax.php file.
note: I noticed lately I'm using MySQL and I should used mysqli I will fix it later.
the getmax.php is:
<?php
// alle relevanten Tabellen abfragen und als json zurückgeben.
$json["status"] = "running";
$details[] = "started get_tables ";
// Include confi.php
include_once('confi.php');
//var_dump($_POST);
$request_body = file_get_contents('php://input');
// first store the given set of data to keep it for future analysis
$statement = "INSERT INTO tbl_archive (content) VALUES ('$request_body' );";
mysql_query($statement);
$input = json_decode($request_body, true);
// now check if valid user
$user = $input["user"];
$username = $user["username"];
$password = $user["password"];
if($password and $username){
$mySQLstring = "SELECT username, password, id, create_user FROM tbl_user where username = '$username' ;";
$json["statement"][] = $mySQLstring;
$qur = mysql_query($mySQLstring);
//var_dump ( $qur );
if ($qur){
$max = mysql_fetch_assoc($qur);
}
if ($max){
$json["max"] = $max;
if ($max["password"] == $password){
$json["username"] = $username;
$json["id"] = $max["id"];
$json["create_user"] = $max["create_user"];
$json["status"] = "ok";
$tables = array("class", "class_user", "module", "module_class", "module_user", "rating", "student", "student_class");
//$tables = array("class");
foreach($tables as $table){
if ( $table == 'module' ){
$statement ='SELECT create_user, MAX(id) FROM tbl_'.$table;
//$statement .= ' GROUP BY create_user' ;
$statement .= ' WHERE create_user = 19 ' ;
$qur = mysql_query($statement);
if ($qur){
while($r = mysql_fetch_array($qur, MYSQL_ASSOC)){
//var_dump($r);
//echo (json_encode($r));
$result[$table][] = $r;
}
}
}
}
$json = array("status" => "ok", "data" => $result);
}
}
}
#mysql_close($conn);
/* Output header */
header('Content-type: application/json');
echo json_encode($json);
?>

PHP and JS are run on the server and client respectively, and as such you cannot call methods/functions of one from the other. AJAX exists to pass values between JS and serverside code.