In first case, i will get full array:
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test.com";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "SELECT * FROM articles WHERE writer='$w_name' ";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
echo $row[header];
}
}
mysqli_close($conn);
?>
In the second case, i will get just 1st value from array:
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test.com";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "SELECT * FROM articles WHERE writer='$w_name' ";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
$q=$row[header];
}
}
mysqli_close($conn);
?>
<div>
<? echo $q ?>
</div>
What should I do, to make 2nd case work like 1st? I mean, how to put into $q, all values of array, not just the first.
You are not defining $q as an array at all.
$q=array();
...
while ($row = mysqli_fetch_assoc($result)) {
$q[]=$row['header'];
}
...
an example of output :
foreach($q as $header) {
echo $header.'<br>';
}
You are overwriting $q . Try using $q[]=
change $q=$row[header]; line to $q[]=$row[header];
and then not echo $q; but print_r($q);
Try to change this into the while
$q = array();
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
array_push($q, $row['header']); // i guess header is a column of the table
}
}
and then you must have your array when print the $q variable, i mean do an print_r($q)
More info about array_push: http://php.net/manual/es/function.array-push.php
Hope this helps :)
Related
please can someone help me with this code? It shows all the users’ info but i need it to show only the info of the logged user.
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "username";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT AEG FROM users";
$result = $conn->query($sql);
if ($result->num_rows > 3) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "id: " . $row["AEG"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>
Upon login, store the email/username/id in a $_SESSION variable;
$_SESSION['email'] = $email; // in this example I used email
Then on your file, you can access session variables using $_SESSION['variable'] and use it on your sql statement;
My modifications are the ones with comments.
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "username";
/*Store session data in a variable*/
$email = $_SESSION['email'];
/**********************************/
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
/*Add where clause to your sql statement*/
$sql = "SELECT AEG FROM users WHERE email ='".$email."'";
/****************************************/
$result = $conn->query($sql);
if ($result->num_rows > 3) {
while($row = $result->fetch_assoc()) {
echo "id: " . $row["AEG"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>
Try this one if you are having 4 user then it is showing only one
if($result->num_rows > 0)
{
while($row = $result->fetch_assoc())
{
echo "id: " . $row["AEG"]. "<br>";
}
}
else
{
echo "0 results";
}
What I wan't to do is create buttons that are automatically generated from the database. So when I add a new record in the database the button is created Is this possible with a loop? So yes how do I create the button.
This is what I have so far:
<?php
$servername = "localhost";
$username = "root";
$password = "Iamthebest1009";
$dbname = "dktp";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM theme";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "". $row["theme_name"]. "<br>";
}
} else {
echo "no results";
}
$conn->close();
?>
Yes it is possible. you need to echo html
<?php
$servername = "localhost";
$username = "root";
$password = "Iamthebest1009";
$dbname = "dktp";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM theme";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$your_url ="https://www.google.com";
echo "". $row["theme_name"]. "<br>";
echo '<input type="button" name="' . $row["theme_name"]. '" value="'. $row["theme_name"].'">';
}
} else {
echo "no results";
}
$conn->close();
?>
MySQL database Start = "2017-03-29 01:30:00"
The problem is:
I print the $SQL and search the record in MySQL database, it can search the record. However, I need to debug and test if there is no result, it will be expected to echo "No". But, it always to echo "Yes" no matter I can get the record in MySQL or not.
How can I fixed it.
Main purpose: Get the record if there are and Echo "No" if there don't have record
<?php
$serverName = "localhost";
$username = "root";
$password = "";
$dbName = "fyp";
$tbName = "events";
$String_start = '2017-03-29 01:28:00';
$String_end = '2017-03-29 01:32:00';
$conn = new mysqli($serverName, $username, $password, $dbName);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//$staffID = $_SESSION['userID'];
$staff_ID = '15207800';
$sql = "SELECT *
FROM `$tbName`
WHERE `start` BETWEEN ('$String_start') AND ('$String_end')";
echo $sql;
$result=mysqli_query($conn,$sql);
if($result)
{
echo "Yes";
}
else{
echo "no";
}
?>
Mysql query only return fails if there is an issue, for successful execution it returns TRUE even if there is no record. You can achieve with follwing way
<?php
$serverName = "localhost";
$username = "root";
$password = "";
$dbName = "fyp";
$tbName = "events";
$String_start = '2017-03-29 01:28:00';
$String_end = '2017-03-29 01:32:00';
$conn = new mysqli($serverName, $username, $password, $dbName);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//$staffID = $_SESSION['userID'];
$staff_ID = '15207800';
$sql = "SELECT *
FROM `$tbName`
WHERE `start` BETWEEN ('$String_start') AND ('$String_end')";
echo $sql;
$result=mysqli_query($conn,$sql);
$num_rows = mysqli_num_rows($result);
if($num_rows > 0)
{
echo "Yes";
}
else{
echo "no";
}
?>
Use mysqli_num_rows that will return total results returned by the query. If total > 0 then results found else no results.
To fetch rows from MySQL result set, use mysqli_fetch_assoc
$result = mysqli_query($conn,$sql);
// $result contains result set and will return `TRUE` if query was successfully executed
// and will return `FALSE` only in case of error
$total = mysqli_num_rows($result);
if($total > 0)
{
echo "Yes";
// Fetch rows from mysql result set
while($row=mysqli_fetch_assoc($result))
{
print_r($row);
}
}
else
{
echo "no";
}
I am trying to loop through my database and check to see if the user already exists in another table. If they do then I want to increment a value, if they don't then I want to add the user.
When I run the code below it happily loops through all the results:
<?php
$servername = "p:10*********";
$username = "*******";
$password = "*******";
$dbname = "******";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM payroll WHERE user != ' ' ";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo $result->num_rows;
while($row = $result->fetch_assoc()) {
$user = $row['user'];
$time = $row['time'];
$id = $row['id'];
echo $id;
echo $user;
}
} else {
echo "0 results";
}
$conn->close();
?>
However when I add in the SQL to check to see if they exist in the other table the loop no longer functions correctly and echos the same user each time.
<?php
$servername = "*******";
$username = "******";
$password = "********";
$dbname = "*****";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM payroll WHERE user != ' ' ";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo $result->num_rows;
while($row = $result->fetch_assoc()) {
$user = $row['user'];
$time = $row['time'];
$id = $row['id'];
echo $id;
echo $user;
// Added existing user check:
$sql = "SELECT * FROM smsreport WHERE user = '$user'";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo "found";
} else {
echo "USER NOT FOUND";
}
}
} else {
echo "0 results";
}
$conn->close();
?>
In the open eye:
Rename the inside $result variable. It is over writting the first $result.
It could be the problem. Not tested though.
I got little problem with my code... because I try to SELECT sth from database and then INSERT some value to another table, but in normal code from w3school
and I got error
Tryingo to get property of non-object
Here is my code:
<?php
session_start();
function connectionDB(){
$host = "localhost";
$username = "root";
$password = "";
$db_name = "project";
$conn = new mysqli($host, $username, $password, $db_name);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
return $conn;
}
function getID(){
$id = $_GET['id'];
return $id;
}
$login =$_SESSION['login'];
$conn =connectionDB();
$idCar = getID();
echo $idCar;
$sqluser = "SELECT ID_USER FROM login_table WHERE LOGIN = $login";
if($result->num_rows > 0)
$result = $conn->query($sqluser);
{
while($row = $result->fetch_assoc())
{
$sql = "INSERT INTO cart (id_user) VALUES ('".$row['ID_USER']."')";
}
}else echo"error";
?>
THIS IS THE CODE OF SIDE WITH PRODUCT
Please see change near your IF loop
$sqluser = "SELECT ID_USER FROM login_table WHERE LOGIN = $login";
$result = $conn->query($sqluser); //check result first
if($result->num_rows > 0) //get number of rows
{
while($row = $result->fetch_assoc())
{
$sql = "INSERT INTO cart (id_user) VALUES ('".$row['ID_USER']."')";
}
}else echo"error";