I cannot get the
$result = DatabaseHandler::query($query);
while ($row = $result->fetch_assoc()) {
$this->mTaskDateCreated[] = $row;
}
to output the time once the user has submitted the form. I'm not sure whereabouts exactly the problems lies as the other two $result work as they return the text entered into the field.
How can I get the $result to return the value of the datetime?
<?php
class ProjectBody {
public $mTasks = array();
public $mTaskName = array();
public $mTaskDateCreated = array();
public function __construct() {
if(isset($_POST['task_name']) && isset($_POST['task'])) {
$task_name = DatabaseHandler::escape($_POST['task_name']);
$task = DatabaseHandler::escape($_POST['task']);
$query = "INSERT INTO `project` (name, task, date_created) VALUES ('$task_name', '$task', NOW())";
$result = DatabaseHandler::query($query);
}
$query = "SELECT * FROM `project` ORDER BY `id` DESC";
$result = DatabaseHandler::query($query);
while ($row = $result->fetch_assoc()) {
$this->mTaskName[] = $row;
}
$result = DatabaseHandler::query($query);
while ($row = $result->fetch_assoc()){
$this->mTasks[] = $row;
}
$result = DatabaseHandler::query($query);
while ($row = $result->fetch_assoc()) {
$this->mTaskDateCreated[] = $row;
}
}
}
?>
Thanks.
Related
I have a getData() function, and a database with two tables: employers and members.
I would like to pass a variable containing the table name, so inside an "if" I could execute the appropriate SELECT statement. My problem I believe that after the "if" the $stmt->bind_param(); doesn't know which $stmt to bind the take.
Any ideas on how I could achieve this?
Thanks
public function getData($table)
{
if ($table == "employers")
{
$stmt = $this->link->prepare("SELECT * FROM employers ");
}
else
{
$stmt = $this->link->prepare("SELECT * FROM members ");
}
$stmt->bind_param();
if ($stmt->execute())
{
$result = $stmt->get_result();
while($row = $result->fetch_array(MYSQLI_ASSOC))
{
$row = array_map('stripslashes', $row);
$dataArray[] = $row;
}
}
return $dataArray;
}
No, since you aren't binding anything, that ->bind_param method is superfluous. Just take that off.
public function getData($table)
{
$dataArray = array();
$t = ($table === 'employers') ? 'employers' : 'members';
$query = "SELECT * FROM $t";
$stmt = $this->link->prepare($query);
if($stmt->execute()) {
$result = $stmt->get_result();
while($row = $result->fetch_assoc()) {
$row = array_map('stripslashes', $row);
$dataArray[] = $row;
}
}
return $dataArray;
}
Sample Usage:
$data = $aministrator_query->getData('members');
$tbody = '';
foreach($data as $row) {
$tbody .= "<tr><td>{$row['user_id']}</td><td>{$row['user_password']}</td><td>{$row['user_first_name']}</td><td>{$row['user_last_name']}</td></tr>";
}
$table = sprintf('<table><thead><tr><th>ID</th><th>Password</th><th>First Name</th><th>Last Name</th></tr></thead><tbody>%s</tbody></table>', $tbody);
echo $table;
How do I fetch data from db using select query in a function?
Example
function ec_select_query($student, $row = '', $fields=array()) {
$qry = "SELECT * FROM student";
$qry = mysql_query($qry);
while($row = mysql_fetch_assoc($qry)){}
return $row;
}
If you want to return all rows then first save it in an array in while loop then return this array.
function ec_select_query($student,$row='',$fields=array())
{
$qry = "SELECT * FROM student";
$qry = mysql_query($qry);
$result = array();
while($row = mysql_fetch_assoc($qry))
{
$result[] = $row;
}
return $result;
}
Its is running code. Modify it according to your needs
$con = mysql_connect('localhost','root','') or die("Unable to connect to MySQL");
mysql_select_db('demo', $con) or die("Database not found");
function ec_select_query($student)
{
$query = "SELECT * FROM $student";
$result = mysql_query($query);
$row = array();
$getData = array();
while($row = mysql_fetch_array($result))
{
$getData[]=$row;
}
return $getData;
}
$information = ec_select_query('accountplans');
echo "<pre>"; print_r($information); die;
Try it
function select_query($table, $where=array(),$fields=array()){
$select_fields = $table."*";
if(!empty($fields) && is_array($fields)){
$select_fields = implode(",", $fields);
}
$sql = "select ".$select_fields." from ".$table." where 1=1 ";
if(!empty($where) && is_array($where)){
foreach ($where as $key => $value) {
$sql .= " AND ".$value;
}
}
$query = mysql_query($sql);
$result = array();
while($row = mysql_fetch_assoc($result)){
$result[] = $row;
}
return $result;
}
Call Function
$fields = array("id","name","city");
$where = array('name = "abc"','city like "aaa"');
$students = select_query("studendts", $where, $fields);
This code might help you :
function ec_select_query($student,$row='',$fields=array())
{
$q = "SELECT * FROM student";
$q = mysql_query($qry);
while($row = mysql_fetch_array($qry))
{
return $row;
}
}
It is easiest way to produce entire data in array
function db_set_recordset($sql) {
$qry = mysql_query($sql);
$row= array();
while($out = mysql_fetch_assoc($qry)) {
$row[] = $out;
}
return $row;
}
$qry = "SELECT * FROM student";
$result = db_set_recordset($qry);
Given the following code:
function fetchData($mysqli){
$sql = "select * from `test`";
$result = mysqli_query($mysqli,$sql);
return $result;
}
$result = fetchData($mysqli);
while($row = mysqli_fetch_array($result)){
echo $row['id'];
}
My code is obviously more complicated than this. It loops itself until it yields some results changing some variables at each iteration.
$result is empty. What am I doing wrong? Thank you!
FULL CODE:
function fetchItem($itemID, $period, $mysqli){
$periodArray = array('7', '30', '60', '90', '180');
while (current($periodArray) !== $period) next($periodArray);
$currentPeriod = current($periodArray);
$sql = "SELECT * from `test` where `period` = '$period'";
$result = mysqli_query($mysqli,$sql);
$row_count = $result->num_rows;
if($row_count < 5){
$currentPeriod = next($periodArray);
fetchItem($itemID, $currentPeriod, $mysqli);
} else if($row_count >= 5){
$currentPeriod = current($periodArray);
$rows = array();
while ($row = $result->fetch_assoc()) {
$rows[] = $row;
}
// var_dump($rows); <-- returns all results
return $rows;
}
}
$output = fetchItem($itemID, $period, $mysqli);
echo '<pre>';
print_r($output); <-- NULL
echo '</pre>';
As you can see if I don't get results for a given period it moves onto the next one.
Your code should be:
function fetchData($mysqli){
$sql = "select * from `test`";
$init = mysqli_query($mysqli, $sql);
$result = $init->fetch_array(MYSQLI_ASSOC);
return $result;
}
$result = fetchData($mysqli);
foreach($result as $row){
echo $row['id'];
}
Hello I'm checking duplicated data from tables. I have a problem that from where data selected. My code is:
$sub_cat = array();
$select = array("core_network","daisy_chain", "rf_bts", "rf_power", "rf_transmission");
$d='0';
for ($i=0;$i<=4;$i++){
$SQL = "SELECT sub_cat FROM (".$select[$i].") WHERE location=('".$id."')";
$result = mysql_query($SQL);
$cs=$d;
if ($result) {
while ($db_field = mysql_fetch_array($result)) {
if(!in_array($db_field['sub_cat'],$sub_cat)) {
$sub_cat[]= $db_field['sub_cat'];
$cs++;
$d=$cs;
$d--;
}
}
}
I need to know that sub_cat selected from which $select[i]. How to find it?
To get the values, do this:
$sub_cat = array();
$select = array("core_network","daisy_chain", "rf_bts", "rf_power", "rf_transmission");
$d='0';
for ($i=0;$i<=4;$i++){
$SQL = "SELECT sub_cat FROM (" . $select[$i] . ") WHERE location=('".$id."')";
$result = mysql_query($SQL); // deprecated - use PDO
$cs = $d;
if ($result) {
while ($db_field = mysql_fetch_array($result)) {
if(!in_array($db_field['sub_cat'], $sub_cat)) {
$table = $select[$i];
$sub_cat[$table][] = $db_field['sub_cat'];
// I have no clue what's going on here in your example:
$cs++;
$d=$cs;
$d--;
}
}
}
}
Then, to retrieve it:
foreach ($sub_cat as $table_name => $values) {
foreach ($values as $row) {
// output values here
}
}
I get an array of values returned from the following function:
function get_subscribitions($user)
{
$user = mysql_real_escape_string ($user);
$sql = "SELECT 'user_id' FROM `subscribe` WHERE subscriber = '$user'";
$result = mysql_query($sql);
$rows = array();
while ($row = mysql_fetch_assoc($result)) {
$rows[] = $row;
}
mysql_free_result($result);
return $rows;
I now want to use these values in a new function, where each "user_id" is used to collect text from the database through this function:
function get_text($writer) {
$writer = mysql_real_escape_string ($writer);
$sql = "SELECT * FROM `text` WHERE user_id='$writer' ORDER BY timestamp desc";
$result = mysql_query($sql);
$rows = array();
while ($row = mysql_fetch_assoc($result)) {
$rows[] = $row;
}
mysql_free_result($result);
return $rows;
However the returned value from the first function is an array, and as I've learnt the hard way, arrays cannot be treated by "mysql_real_escape_string".
How can I make the second function handle the values that I got from the first function?
Any responses appreciated.
Thank you in advance.
Your first mistake is to use mysql_fetch_assoc when only selecting one column. You should use mysql_fetch_row for this. This is likely going to fix your primary problem.
Could look like this:
$subs = get_subscribitions($whateverId);
$texts = get_text($subs);
function get_subscribitions($user)
{
$user = mysql_real_escape_string ($user);
$sql = "SELECT 'user_id' FROM `subscribe` WHERE subscriber = '$user'";
$result = mysql_query($sql);
$rows = array();
while ($row = mysql_fetch_row($result)) {
$user_id = $row['user_id'];
$rows[$user_id] = $user_id;
}
mysql_free_result($result);
return $rows;
}
function get_text($writer) {
$writers = implode(",", $writer);
$sql = "SELECT * FROM `text` WHERE user_id IN ({$writers}) ORDER BY timestamp DESC";
$result = mysql_query($sql);
$rows = array();
while ($row = mysql_fetch_array($result)) {
$rows[] = $row;
}
mysql_free_result($result);
return $rows;
}
This will save you a lot of time, because you can get all data from 'text' in one statement.
The solution is to avoid placing arrays in your $rows array in the first function. Instead of:
while ($row = mysql_fetch_assoc($result)) {
$rows[] = $row;
}
try:
while ($row = mysql_fetch_assoc($result)) {
$rows[] = $row['user_id'];
}
This will place only the value from column 'user_id' in the $rows array.
In order to use the second function you must iterate over the array returned from the first one. Something like this could work for you:
$user_subscriptions = get_subscribitions($user);
foreach($user_subscriptions as $subscription) {
$texts = get_text($subscription['user_id']);
foreach($texts as $text) {
// do something with the fetched text
}
}
As George Cummins says,
while ($row = mysql_fetch_assoc($result)) {
$rows[] = $row['user_id'];
}
and, to speed up the second function:
function get_text($writer)
{
$sql = "SELECT * FROM `text` WHERE user_id in (".implode(',',$writer).") ORDER BY timestamp desc";
$rows = array();
if ($result = mysql_query($sql))
{
while ($row = mysql_fetch_assoc($result))
{
$rows[] = $row;
}
mysql_free_result($result);
}
return $rows;
}
The change to the query means that you only do one in total rather than one for each ID thus removing the time taken to send the query to the server and get a response multiple times. Also, if the query fails, the function returns an empty array
Use :
string implode ( string $glue , array $pieces )
// example, elements separated by a comma :
$arrayasstring = impode(",", $myarray);
function get_subscribitions($user)
{
$user = mysql_real_escape_string ($user);
$sql = "SELECT 'user_id' FROM `subscribe` WHERE subscriber = '$user'";
$result = mysql_query($sql);
$row = mysql_fetch_row($results);
mysql_free_result($result);
return intval($row['user_id']);
}
it return only the user id you can used it in the 2nd function