Build and send PHP Array to JS via Ajax - javascript

I want to build an array in PHP from SQL query and send it back via ajax to my JS file.
$id = clear(filter_input(INPUT_POST, 'id'));
$sql = 'SELECT * FROM `counties` WHERE `id`="'.$id.'"';
$query = mysqli_query($con, $sql);
$array = array();
while($result = mysqli_fetch_array($query)) {
$id = $result['id'];
$name = $result['name'];
$array[] = array('id' => $id, 'name' => $name);
}
echo json_encode($array);
This is my code. In response I have always just one element. There's a lot of more. How could i do that correctly? I was browsing whole Internet and I didn't find anything useful... :(

$id = $_POST['id'];
$query = mysqli_query($con, "SELECT id,name FROM `counties` WHERE `id`='$id'");
$array = mysqli_fetch_all($query,MYSQLI_ASSOC);
echo json_encode($array);
this may simplified code

Related

How to remove multiple rows from mysql table, using an array of IDs in PHP

I'm having trouble using an array to make an sql query delete multiple rows of data at once. Please ignore that I'm using sql injection for now.
EDIT: A somewhat better explanation - my php does not work at all. I have edited it somewhat, after checking the link Sebastian provided in the comments
NOTE: I'm using AngularJS to post
This is my $data structure, from my controller.js function. devicesToDelete is just a simple array, e.g. ["1", "2", "3"]:
$http.post('./js/removeMultiple.php', { 'devicesToDeleteArray': devicesToDelete })
.success(function(data) {
$scope.results = data;
devicesToDelete = [];
})
.error(function(err) {
$log.error(err);
})
This is the updated php code im having trouble with. On clicking my deleteMultiple button, only the confirm alert fires, the selected items aren't deleted and the console is clear of errors:
<?php
$data = json_decode(file_get_contents("php://input"));
include('config.php');
$sql = "DELETE FROM devices WHERE devID in ( implode(",", $data) )";
$qry = $conn->query($sql);
$sql = "SELECT * FROM devices";
$qry = $conn->query($sql);
$data = array();
if($qry->num_rows > 0){
while($row = $qry->fetch_object()){
$data[] = $row;
}
}else {
$data[] = null;
}
$conn->close();
echo json_encode($data);
EDIT 2: I managed to solve the issue on my own. Here is the solution:
I used .join() on my array on the javascript side to have all of the IDs for deletion be separated by commas (e.g. 1, 2, 3):
$http.post('./js/removeMultiple.php', { 'devicesToDeleteArray': devicesToDelete.join(", ") })
.success(function(data) {
$scope.results = data;
devicesToDelete = [];
})
.error(function(err) {
$log.error(err);
})
Then I just added what I completely glanced over in my php code which is the name of the array i was passing into it - devicesToDeleteArray
<?php
$data = json_decode(file_get_contents("php://input"));
include('config.php');
$sql = "DELETE FROM devices WHERE devID in ($data->devicesToDeleteArray)";
$qry = $conn->query($sql);
$sql = "SELECT * FROM devices";
$qry = $conn->query($sql);
$data = array();
if($qry->num_rows > 0){
while($row = $qry->fetch_object()){
$data[] = $row;
}
}else {
$data[] = null;
}
$conn->close();
echo json_encode($data);
here is php code:
<?php
$ids = $_POST['devicesToDeleteArray'];
if(!is_array($data)) {
$ids = json_decode($data, true);
}
if(!empty($ids)) {
include 'config.php';
$sql = "DELETE FROM devices WHERE devID in (implode(",", $ids))";
$qry = $conn->query($sql);
$sql = "SELECT * FROM devices";
$qry = $conn->query($sql);
$data = array();
if ($qry->num_rows > 0) {
while ($row = $qry->fetch_object()) {
$data[] = $row;
}
} else {
$data[] = null;
}
$conn->close();
echo json_encode($data);

HighChart for PHP 5.1 lower

I am new to PHP and Highchart. Currently, I am trying to:
1. Query my data from MySQL using PHP.
2. To display HighChart :: Javascript, get data from json_encode in PHP.
Problem now, my PHP is 5.1.6 (I have a few applications running since few years back, try not to upgrade the php). I cannot use the json_numeric_check.
Help Needed :
Question 1: is there any alternative way to get the value without json_numeric_check?
Question 2: Is there any package I can add in to php 5.1.6 to use json_numeric_check?
This is the code I want to use ::
print json_encode($result,json_numeric_check);
My Full Code
<?php
header("Content-Type:application/json");
include_once "shift.php";
list($s1,$e1,$shift) = shift_frame();
$servername = 'localhost';
$username = "";
$password = "";
$select = "SELECT EH_CELLNUM, COUNT(EH_SERIALID)";
$table = " FROM T_EEDATA";
$rule1 = " WHERE (EH_END_DT between ".$s1." and ".$e1.") group by EH_CELLNUM";
$conn = mysql_connect($servername,$username,$password) or die("Connection failed: " . mysqli_connect_error());
mysql_select_db("eedata",$conn) or die(mysql_error());
$sql = $select.$table.$rule1;
$query = mysql_query( $sql, $conn );
$category = array();
$category['name'] = 'Cellnum';
$series1 = array();
$series1['name'] = 'SerialID';
while($row = mysql_fetch_array($query)){
$category['data'][] = $row['EH_CELLNUM'];
$series1['data'][] = $row['COUNT(EH_SERIALID)'];
}
////////////code add here???/////////////////////////////
$result = array();
array_push($result,$category);
$result2 = array();
array_push($result,$series1);
print json_encode($result,json_numeric_check);
mysql_close($conn);
?>
you can do someting to $result before json_encode
for example:
$result = array("1", "2", "3", "4");
$result = array_str_to_int($result);
// only for simple array,you can optimize the code
function array_str_to_int($array){
$tmp_arr = array();
foreach( $array as $k => $v ){
$tmp_arr[] = intval($v);
}
return $tmp_arr;
}

how to use the values from mysql database from php in javascript function

In php, i have used an sql query to fetch the data like :-
$sql="Select * from xyz";
$result = $conn->query($sql);
// output data of each row
while($row = $result->fetch_assoc()) {
error_log( "id" . $row["id"]);
}
Now i want to use all the values attained using $row["id"] in javascipt function and use it in a variable (var j , lets say). How to do this?
Try something like this:
<?php
$sql="Select * from xyz";
$errorsData = array();
$result = $conn->query($sql);
// output data of each row
while($row = $result->fetch_assoc()) {
error_log( "id" . $row["id"]);
$errorData[]=$row["id"]
}
$errorJson = json_encode($errorsData);
?>
<script>
var errorJson = <?= $errorJson ?> ;
console.log(errorJson);
<script>
Good luck!!
in jquery I would have done like this,
php
$sql="Select * from xyz";
$arr_json = array();
$result = $conn->query($sql);
// output data of each row
while($row = $result->fetch_assoc()) {
error_log( "id" . $row["id"]);
$arr_json[] = $row['id'];
}
echo json_encode($arr_json);
jquery
$.get(
<THAT CALLED URL>,
function(ret_data){
console.log(ret_data);
/* you can use the ret_data as ret_data.<INDEX> */
}
);

Access DB from html file via custom PHP file

Right now I have working a DB connection to mysql. The html -> PHP -> query -> data reception works. I show the relevant code:
From the html file matters:
d3.json("http://path/file.php", function(error, data) {
console.log (data);
});
file.php:
<?php
$username = "myusername";
$password = "mypassword";
$host = "myhost";
$database="myDB";
$server = mysql_connect($host, $username, $password);
$connection = mysql_select_db($database, $server);
$myquery = "select * from `mytable`";
$query = mysql_query($myquery);
if ( ! $query ) {
echo mysql_error();
die;
}
$data = array();
for ($x = 0; $x < mysql_num_rows($query); $x++) {
$data[] = mysql_fetch_assoc($query);
}
echo json_encode($data);
mysql_close($server);
?>
What I want is to have only 1 .php file instead of 1 php file for every query. That means I need to send from the html a variable inputquery to the php file. I've tried several things such as changing:
`$myquery = "select * from `mytable`; into `$myquery = inputquery`;
And I think that the wrong point is the definition of the function that requests the data from the DB. What I tried (wrong, the following code does not work as expected):
var inputquery = "select * from `mytable`"
d3.json("http://serverhost/path/file.php", function(error, data) {
console.log (data);
});
Maybe this is not working because I am not telling the function I want as an input to the .php file the variable inputquery. I tried to put it inside the function, but got "data is not defined" errors, so I think it is not worth it to show the wrong code.
How can I input that var inputquery to the .php file? It could not be the way I planned it.
Thank you
You have to send the inputquery variable with the http request as POST data,
then in you php file you can do :
$myquery = $_POST['inputquery'];
You surely will find some documentation about sending post data with the request you're sending.
The simplest way is using get parameter in d3.json:
var yourparam = 'mytable';
d3.json("http://path/file.php?query=" + yourparam, function (error, json) {
...
});
You can retrieve the variable from the $_GET array.
Finally don't put mysql commmands into your js, and don't use mysql library. It's very dangerous.
This is a very bad idea, since you become very vulnerable to SQL Injection, even so I will try to help you
I assume you have JQuery if you have so
you can do the following
html.file
var inputquery = "select * from `mytable`";
$.post("relative/path/to/file.php",
{query : inputquery},
function (data) {
alert(data); // See output
},'json);
file.php
<?php
$username = "myusername";
$password = "mypassword";
$host = "myhost";
$database="myDB";
$server = mysql_connect($host, $username, $password);
$connection = mysql_select_db($database, $server);
$myquery = $_POST['query'];
$query = mysql_query($myquery);
if ( ! $query ) {
echo mysql_error();
die;
}
$data = array();
for ($x = 0; $x < mysql_num_rows($query); $x++) {
$data[] = mysql_fetch_assoc($query);
}
echo json_encode($data);
mysql_close($server);
?>

json_encode a MySQL table and urldecode Each Row

Here's what I got. I have a MySQL table, in this case 'businesses' which has a many rows of urlencode() data. I am trying to use a php script (getTable.php) to grab the table urldecode() each row and then use a json_encode to send the data as an array back to javascript. Here's what i have so far.
$table = $_GET['table'];
$query = "SELECT * FROM $table";
$jsonOut = array();
while($result = mysql_fetch_array(mysql_query($query)))
{
foreach($result as &$value)
{
$value = urldecode($value);
}
$jsonOut[] = $result;
}
echo (json_encode($jsonOut));
Obviously, I'm doing something wrong because I'm causing an infinite loop and nothing ends up working. Any help wold be greatly appreciated.
Try this code:
$table = $_GET['table'];
$query = "SELECT * FROM $table";
$jsonOut = array();
$result = mysql_query($query);
while($result = mysql_fetch_array($result))
{
$jsonOut[] = $result;
}
echo (json_encode($jsonOut));
In fact the query has to be executed only once, not once for each iteration of the while loop, or else you'll end up with an infinite loop!
Also, as a side note, you should avoid using mysql_* functions as they're now deprecated, try to switch to PDO if you can.
EDIT:
If you need to urldecode each row, replace
$jsonOut[] = $result;
with
$jsonOut[] = array_map('urldecode', $result);
inside the while loop.
This is the infinite loop you're talking about
while($result = mysql_fetch_array(mysql_query($query)))
Try
$recordset=mysql_query($query);
while($result = mysql_fetch_array($recordset)){
}
Note: MySQL API is long deprecated, better move away from it before you are forced to
You should do like this:
$query = mysql_query($query);
while($result = mysql_fetch_array($query)) {
You could retrieve and decode your parameters with the following code. (Based on #Matteo Tassinari answer)
$table = $_GET['table'];
//This could be a SQL injection
$query = "SELECT * FROM " . mysql_real_escape_string($table);
$jsonOut = array();
$result = mysql_query($query);
while($result = mysql_fetch_array($result))
{
$newArray = array();
foreach ($result as $k => $v) {
$newArray[$k] = urldecode($v);
}
$jsonOut[] = $newArray;
}
echo (json_encode($jsonOut));

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