I'm using React Native and extracting data from MYSQL. But I can't get the direct result of my data. So the output that is now: "[{" STT_TIP ":" Taxi "}]", I would say that the output: "Taxi" get. So just give me the result. He's drawing his name in the painting I'm taking now. I just want to draw the result.
<?php
include 'DBConfig.php';
$conn = new mysqli($HostName, $HostUser, $HostPass, $DatabaseName);
mysqli_query($conn, "SET CHARACTER SET 'utf8'");
mysqli_query($conn, "SET SESSION collation_connection ='utf8_turkish_ci'");
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$arr = array();
$json = file_get_contents('php://input');
$obj = json_decode($json, true);
$email = $obj['email'];
$password = $obj['password'];
$Sql_Query = "select STT_TIP from ...... where .. = '$email' and . = '$password' ";
$result = $conn->query($Sql_Query);
if ($result->num_rows > 0) {
while ($row[] = $result->fetch_assoc()) {
$tem = $row;
$json = json_encode($tem);
}
} else {
}
echo $json;
$conn->close();
?>
Since you said this only returnn 1 result. Don't bother with the loop
use
$row = $result->fetch_assoc(); // same as mysqli_fetch_assoc($result)
and
$json = json_encode($row['STT_TIP');
Will return the same as plain text(no brace, nor object)
Be carefull, your code is vulnerbale to SQL injection.
Related
through a cURL connection, I can pick up data, from Json files, placed on a remote server. In particular, the codes of some products, which thanks to a foreach
foreach($data['results'] as $key=>$val){
$codici_hotel = $val['hotel_code'];
echo $codici_hotel.",";
}
I can see on video:
1074d0,19f726,1072ba,107104,183444,112438,15d8ab,1b326e,19d885,189b95,1071bf,107155,193e61,10aab2,138752,18dd7d,19d7f9,117b0d,1071b8,1398c4,107039,110851,107124,110669
Now I need to use that string to run a select on a local database, such as:
$sql = "SELECT * FROM hotels WHERE code = ('$codici_hotel')";
What is the correct sql string?
Thanks for your help
CODE UPDATE USED
$codici_hotel_arr = array();
foreach($data['results'] as $key=>$val){
$codici_hotel_arr[] = $val['hotel_code'];
}
$codici_hotel = "'".implode(",",$codici_hotel_arr)."'";
$conn2 = new mysqli($servername, $username, $password, $dbname);
if ($conn2->connect_error) {
die("Connection failed: " . $conn2->connect_error);
}
$sql2 = "SELECT name FROM hotels WHERE code IN ('$codici_hotel')";
$result2 = $conn2->query($sql2);
if ($result2->num_rows > 0) {
// output data of each row
while($row2 = $result2->fetch_assoc()) {
$nome_hotel = $row2["name"] ;
}
} else {
echo "0 results";
}
$conn2->close();
echo $nome_hotel;
You have to convert your all codes in string enclosed with '. Then use IN clause of mysql. change your code as below
$codici_hotel_arr = array();
foreach($data['results'] as $key=>$val){
$codici_hotel_arr[] = $val['hotel_code'];
}
$codici_hotel = "'".implode(",",$codici_hotel_arr)."'";
$sql = "SELECT * FROM hotels WHERE code IN ($codici_hotel)";
I am trying to create a JSON object as an array from the data received from the SQL Query. Currently the encoded JSON I have got is:
[{"firstname":"Student","lastname":"1"},{"firstname":"Student","lastname":"2"},{"firstname":"Student","lastname":"3"}]
The values I want to insert from another array, the values are in corresponding order to the each array in the JSON above: (JSON)
["85.00000","50.00000","90.00000"]
So the JSON should look like:
{"firstname":"Student","lastname":"1","grade":"85.00000"}
My Current Code:
//Provisional Array Setup for Grades
$grade = array();
$userid = array();
$sqldata = array();
foreach($json_d->assignments[0]->grades as $gradeInfo) {
$grade[] = $gradeInfo->grade;
$userid[] = $gradeInfo->userid;
}
//Server Details
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "moodle";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
foreach($userid as $id) {
$sql = "SELECT firstname, lastname FROM mdl_user WHERE id='$id'";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row
while($row = mysqli_fetch_array($result, MYSQL_ASSOC)) {
$sqldata[] = $row;
}
} else {
echo "ERROR!";
}
}
$sqlr = json_encode($sqldata);
$grd = json_encode($grade);
echo $sqlr;
echo $grd;
mysqli_close($conn);
try this code:
foreach($userid as $x => $id) {
$sql = "SELECT firstname, lastname FROM mdl_user WHERE id='$id'";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row
while($row = mysqli_fetch_array($result, MYSQL_ASSOC)) {
$row['grade'] = $grade[$x];
$sqldata[] = $row;
}
} else {
echo "ERROR!";
}
}
I added the Variable $x and added $row['grade'] with the same index on the $gradearray
function set_column_values($arr, $column_name, $column_values) {
$ret_arr = array_map(function($arr_value, $col_value) use ($column_name) {
$arr_value[$column_name] = $col_value;
return $arr_value;
}, $arr, $column_values);
return $ret_arr;
}
$sqldata = set_column_values($sqldata, 'grades', $grade);
$sqlr = json_encode($sqldata);
var_dump($sqlr);
Hope it helps!
I'm currently stuck with some PHP code. I want to access a table in my database and retrieve the data in a JSON format. Therefore, I tried the following code :
<?php
$con = mysqli_connect("......","username","pwd","DBName");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql = "SELECT * FROM users";
if ($result = mysql_query($con, $sql))
{
$resultArray = array();
$tempArray = array();
while($row = $result->fetch_object())
{
$tempArray = $row;
array_push($resultArray, $tempArray);
}
echo json_encode($resultArray);
}
mysqli_close($con);
?>
However, it's getting me an empty page. It worked once but only with a special number of row in the table, so not very efficient as you might guess.
Does anybody have an idea why i'm getting those weird results?
EDIT 1 :
I Just tried to add this to my code :
echo json_encode($resultArray);
echo json_last_error();
And it's returning me 5. It seems to be an error from the data encoding in my table. Therefore I added that code :
$tempArray = array_map('utf8_encode', $row)
array_push($resultArray, $tempArray);
And I got the following output : [null,null,null]0 (The zero comes from the echo json_last_error();)
So here I am, can anybody help me with this ?
I would start by changing if ($result = mysql_query($con, $sql)) to if ($result = mysqli_query($con, $sql)) because they are different database extensions
Another thing would be to change while($row = $result->fetch_object()) to while ($row = mysqli_fetch_object($result)) { (Procedural style vs. Object oriented style)
If you still see blank screen, try adding error_reporting(E_ALL); at the top of your script, and you'll be able to know exactly where the bug is
<?php
$con = mysqli_connect("......","username","pwd","DBName")
or die("Failed to connect to MySQL: " . mysqli_connect_error());
$sql = "SELECT * FROM users";
$query = mysqli_query($con, $sql) or die ("Failed to execute query")
if ($result = $query)
{
$resultArray = array();
while($row = $result->fetch_object())
{
array_push($resultArray, $row);
}
$result->close()
echo json_encode($resultArray);
}
mysqli_close($con);
?>
This code works for me, try it out:
<?php
$con = mysqli_connect("......","username","pwd","DBName");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql = "SELECT * FROM users";
if ($result = mysqli_query($con, $sql))
{
while($row = $result->fetch_object())
{
$resultArray[] = $row;
}
echo json_encode($resultArray);
}
mysqli_close($con);
?>
EDIT 1:
As a test replace this code:
while($row = $result->fetch_object())
{
$resultArray[] = $row;
}
echo json_encode($resultArray);
with this code:
while($row = $result->fetch_assoc())
{
print_r($row);
}
What output do you get?
I finally found a solution ! That was indeed an encoding problem, the json_encode() function accepts only strings encoded in utf8. I changed the interclassement of my table to utf8_general_ci and I modified my code as follows :
<?php
//Create Database connection
$db = mysql_connect(".....","username","pwd");
if (!$db) {
die('Could not connect to db: ' . mysql_error());
}
//Select the Database
mysql_select_db("DBName",$db);
//Replace * in the query with the column names.
$result = mysql_query("SELECT * FROM users", $db);
//Create an array
$json_response = array();
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
$row_array['id'] = $row['id'];
$row_array['name'] = utf8_encode($row['name']);
$row_array['lastName'] = utf8_encode($row['lastName']);
//push the values in the array
array_push($json_response,$row_array);
}
echo json_encode($json_response);
//Close the database connection
fclose($db);
?>
And I got the expected output.
I am trying to draw data from multiple tables that have been indexed to relate to one another. I ran this query in MySQLWorkbench, and it ran successfully. However when I tried to run a PHP test, nothing showed up, not even for the first field. Here is my code:
<?php
$db = new mysqli('host', 'user', 'password', 'database');
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "
SELECT
`Contact`.`firstName`,
`Contact`.`lastName`,
`ssn`.`ssn`,
`Contact`.`country`,
`Allergies`.`allergy`,
`Allergies`.`allergyType`,
`Allergies_Contact`.`allergyNotes`,
`CurrentPrescriptions`.`prescriptionName`,
`CurrentPrescriptions`.`prescribedDate`,
`BloodType`.`bloodType`
FROM
`database`.`Contact`,
`database`.`Allergies_Contact`,
`database`.`Allergies`,
`database`.`ssn`,
`database`.`CurrentPrescriptions`,
`database`.`BloodType`
WHERE
`Contact`.`contactKey` = `Allergies_Contact`.`contactKey`
AND `Allergies`.`allergiesKey` = `Allergies_Contact`.`allergiesKey`
AND `ssn`.`contactKey` = `Contact`.`contactKey`
AND `CurrentPrescriptions`.`contactKey` = `Contact`.`contactKey`
AND `BloodType`.`contactKey` = `Contact`.`contactKey`;
";
$result = $db->query($query) or die($db->error.__LINE__);
if ($result = mysqli_query($db, $query)) {
while ($row = mysqli_fetch_row($result)) {
print(row[0]);
}
mysqli_free_result($result);
}
mysqli_close($db);
?>
Please tell me what I am doing wrong here, because from what I can see its formatted correctly.
Several things:
1.- You have two query sentences, change:
$result = $db->query($query) or die($db->error.__LINE__);
if ($result = mysqli_query($db, $query)) {
With this
$result = $db->query($query) or die($db->error.__LINE__);
if ($result !== false) {
2.- Yo made a mistake when trying to print the variable, change:
while ($row = mysqli_fetch_row($result)) {
print(row[0]);
}
With this
while ($row = mysqli_fetch_row($result)) {
print($row[0]); // You missed a $
}
<?php
//conection:
$link = mysqli_connect("myhost","myuser","mypassw","mybd") or die("Error " . mysqli_error($link));
//consultation:
$query = "SELECT name FROM mytable" or die("Error in the consult.." . mysqli_error($link));
//execute the query.
$result = $link->query($query);
//display information:
while($row = mysqli_fetch_array($result)) {
echo $row["name"] . "<br>";
}
?>
http://php.net/manual/en/function.mysqli-connect.php
I would like to add, let's say, some kind of a title. My PHP returns something like this:
[{"Grad":"Beograd","Predmet":"matematika"},{"Grad":"Novi_Sad","Predmet":"matematika"},{"Grad":"Beograd","Predmet":"matematika"}]
And I would like to get something like this
{"lista"[{"Grad":"Beograd","Predmet":"matematika"},{"Grad":"Novi_Sad","Predmet":"matematika"},{"Grad":"Beograd","Predmet":"matematika"}]}
This is my PHP
$con = mysqli_connect($host, $user, $pwd, $db);
if(mysqli_connect_errno($con)) {
die("Failed to connect to MySQL: " . mysqli_connect_error());
}
$sql = "SELECT Grad, Predmet FROM lista";
$result = mysqli_query($con, $sql);
$rows = array();
while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
$rows[] = $row;
}
mysqli_close($con);
echo json_encode($rows);
$rows = (object) array('lista' => $rows);
echo json_encode($rows);
Something like this: $rows['lista'][] = $row ?