PHP - foreach how to store the array to mysql - php

I want to store array into mysql db something like this
item_row = nike,adidas,puma
qty_row = 1,3,2
total_row = 100,200,150
foreach
foreach ($_SESSION['order'] as $values) {
$item_name = $values['item-name'];
$item_qty = $values['item-qty'];
$item_price = $values['item-price'];
}
Let me know how to do that?
update
foreach ($_SESSION['order'] as $values) {
$item_name[] = $values['item-name'];
$item_qty[] = $values['item-qty'];
$item_price[] = $values['item-price'];
}
$item_row = implode(",", $item_name);
$qty_row = implode(",", $item_qty);
$total_row = implode(",", $item_price);

item_row = implode(',', $_SESSION['order']['item-name']);
qty_row = implode(',', $_SESSION['order']['item-qty']);
total_row = implode(',', $_SESSION['order']['item-price']);

I'm using a class to manage the connection to the data base and the query execution let me add it to you:
class DbConnection
{
var $ReturnQuery;
function Connect()
{
$connection = mysql_connect("serverName", "user", "password");
$DbSelect = mysql_select_db("databaseName", $connection);
if ($DbSelect)
return true;
else
return false;
}
function Execute($Query)
{
$ExecuteQuery = mysql_query($Query);
$affected = mysql_affected_rows();
if ($affected != -1)
{
if ($affected != 0)
{
if ($ExecuteQuery != 1)
{
while($row=mysql_fetch_assoc($ExecuteQuery))
{
$ResulArray[] = $row;
}
$this->ReturnQuery = $ResulArray;
}
return 1;
}
else
{
$this->ReturnQuery = '';
return 0;
}
}
else
{
$this->ReturnQuery = '';
return -1;
}
}
}
and then you can create instances to execute your query:
require_once('Includes/DbConnection.php');
$this->db = new DbConnection();
$this->db->Connect();
$query = "insert into items (item_name, item_qty, item_price) values ('".$item_name."', '".$item_qty."', '"$item_price"');
$query_safe = mysql_real_escape_string($query);
$this->db->Execute($query_safe);
I hope it helps!!

foreach ($_SESSION['order'] as $values) {
mysql_query('INSERT INTO tablename (name, qty, price) VALUES("'.$values['item-name'].'", "'.$values['item-qty'].'", "'.$values['item-price'].'"');
}

Related

I am experiencing trouble with MySQL Update and i don't know how to fix it

I am new to MySQL. Here is my codeblock:
public function updateTable($obj, $column_names, $table_name, $bannerid) {
$c = (array) $obj;
$id = $bannerid;
$keys = array_keys($c);
$columns = '';
$values = '';
foreach($column_names as $desired_key){ // Check the obj received. If blank insert blank into the array.
if(!in_array($desired_key, $keys)) {
$$desired_key = '';
}else{
$$desired_key = $c[$desired_key];
}
$columns = $columns.$desired_key.',';
$values = $values."'".$$desired_key."',";
}
//$query = "INSERT INTO ".$table_name."(".trim($columns,',').") VALUES(".trim($values,',').")";
//mysql_query("UPDATE blogEntry SET content = '$udcontent', title = '$udtitle' WHERE id = $id");
$query = "UPDATE ".$table_name." SET "."(".trim($columns,',').") = VALUES(".trim($values,',').")" ."WHERE id = '$id'" ;
$r = $this->conn->query($query) or die($this->conn->error.__LINE__);
if ($r) {
$new_row_id_update = $this->conn->insert_id;
return $new_row_id_update;
} else {
return NULL;
}
}
Here is the error I got:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(image_url,intro) = VALUES('800bf5f59a1d13c8.jpg',',sd,cfcjaklewfh ewiuofejkfdh ' at line 1100
sgeddes is correct about the query structure. Try this one. You should echo out the $query to make sure it builds correctly.
public function updateTable($obj, $column_names, $table_name, $bannerid) {
$c = (array) $obj;
$id = $bannerid;
$keys = array_keys($c);
$subquery='';
foreach($column_names as $desired_key){
// Check the obj received. If blank insert blank into the array.
if(!in_array($desired_key, $keys)) {
$$desired_key = '';
}else{
$$desired_key = $c[$desired_key];
}
$subquery.=$desired_key."='".$$desired_key ."',";
}
//remove trailing common
$query="UPDATE ".$table_name." SET " substr(subquery,0,-1)." WHERE id = '$id'" ;
$r = $this->conn->query($query) or die($this->conn->error.__LINE__);
if ($r) {
$new_row_id_update = $this->conn->insert_id;
return $new_row_id_update;
} else {
return NULL;
}
}

Fatal error: Call to a member function get() on null in C:\wamp\www\Cocolani\php\req\checkusername.php on line 4

I get an error in my file "checkusername.php".
The error I get is:
( ! ) Fatal error: Call to a member function get() on null in
C:\wamp\www\Cocolani\php\req\checkusername.php on line 4
There is a "checkusername.php" file :
<?php
include_once("../../includes/db.php");
include_once("settings.php");
$db = new database($obj->get("db_name"), $obj->get("db_server"), $obj->get("db_user"), $obj->get("db_password"), $obj->get("url_root"));
$username = isset($_POST['username']) ? mysqli_real_escape_string($_POST['username']) : "";
$password = isset($_POST['password']) ? mysqli_real_escape_string($_POST['password']) : "";
$email = isset($_POST['email']) ? mysqli_real_escape_string($_POST['email']) : '';
$birthdate = isset($_POST['birthdate']) ? mysqli_real_escape_string($_POST['birthdate']) : "";
$firstname = isset($_POST['firstname']) ? mysqli_real_escape_string($_POST['firstname']) : "";
$lastname = isset($_POST['lastname']) ? mysqli_real_escape_string($_POST['lastname']) : "";
$sex = isset($_POST['sex']) ? mysqli_real_escape_string($_POST['sex']) : "";
$tribeid = isset($_POST['clan']) ? mysqli_real_escape_string($_POST['clan']) : "";
$mask = isset($_POST['mask']) ? mysqli_real_escape_string($_POST['mask']) : "";
$mask_color = isset($_POST['maskcl']) ? mysqli_real_escape_string($_POST['maskcl']) : "";
$lang_id = isset($_POST['lang_id']) ? addslashes($_POST['lang_id']) : 0;
$error = '';
// get language suffix
if ($lang_id != 0) {
$db->setQuery("SELECT * FROM `cc_extra_langs` WHERE id='{$lang_id}'");
$res = $db->loadResult();
$lang = "_".$res->lang;
} else $lang = "";
$reg_ok = true;
$db->setQuery("SELECT one_email_per_registration FROM `cc_def_settings`");
$res = $db->loadResult();
$one_registration_per_email = ($res->one_email_per_registration == 1);
$email_check_ok = true;
if ($one_registration_per_email == true) {
$sql = "SELECT COUNT(*) AS counter FROM `cc_user` WHERE email='{$email}'"; // for several registrations per one email address -- no check
$db->setQuery($sql);
$res1 = $db->loadResult();
$email_check_ok = $res1->counter == "0";
}
if ($email_check_ok == false) {
$sql = "SELECT * FROM `cc_translations` WHERE caption='DUPLICATED_EMAIL'";
$db->setQuery($sql);
$res = $db->loadResult();
echo 'error='.urlencode($res->{"name".$lang});
$reg_ok = false;
}
/*if ($reg_ok && $email != '') {
// get number of already registered number of registrations with this email address
$sql = "SELECT count(*) as registered_num_emails FROM `cc_user` WHERE email='{$email}'";
$query = $db->setQuery($sql);
$row = mysql_fetch_object($query);
$registered_num_emails = $row->registered_num_emails;
$sql = "SELECT max_num_account_per_email from `cc_def_settings`";
$query = $db->setQuery($sql);
$row = mysql_fetch_object($query);
// it's possible to create new registration using this email address
if ($registered_num_emails >= $row->max_num_account_per_email) {
$sql = "SELECT * FROM `cc_translations` WHERE caption='MAX_NUM_REGISTRATION_REACHED'";
$db->setQuery($sql);
$res = $db->loadResult();
echo 'error='.urlencode($res->{"name".$lang});
$reg_ok = false;
}
}*/
////////
// echo 'error=111';
// $reg_ok = false;
////////
if ($reg_ok) {
// check for swear words
$db->setQuery("SELECT COUNT(*) as counter from `cc_swear_words` where INSTR('".$username."', `name`)");
$res2 = $db->loadResult();
if ((int)($res2->counter) > 0) { // swear word founded!
$sql = "SELECT * FROM `cc_translations` WHERE caption='USERNAME_NOT_PERMITTED'";
$db->setQuery($sql);
$res = $db->loadResult();
echo 'error='.urlencode($res->{"name".$lang});
$reg_ok = false;
}
}
if ($reg_ok) {
// first check there is no username with this name already registered.
$db->setQuery("SELECT COUNT(*) AS counter FROM `cc_user` WHERE username='".$username."'");
$res = $db->loadResult();
if ((int)($res->counter) > 0) { // swear word founded!
// get warning message from db
$db->setQuery("SELECT * FROM `cc_translations` WHERE caption='USERNAME_IN_USE'");
$res = $db->loadResult();
echo 'error='.urlencode($res->{"name".$lang});
$reg_ok = false;
}
}
if ($reg_ok) echo 'result=true';
?>
The problem on line 4 which is :
$db = new database($obj->get("db_name"), $obj->get("db_server"), $obj->get("db_user"), $obj->get("db_password"), $obj->get("url_root"));
There is a "settings.php" :
<?php
$db_server = "localhost";
$db_user = "root";
$db_password = "pass1234";
$db_name = "cocolani_battle";
$appsecret = "80f730a73ac60417c36c341bc975f6f1";
$connect = mysqli_connect("$db_server","$db_user","$db_password","$db_name");
?>
and there is a "db.php" :
<?php
/*
Usage
$db = new database($dbname);
for selects:
$db->setQuery("SELECT * FROM `table`")
$resultArray = $db->loadResults();
$db->setQuery("SELECT * FROM `table` WHERE `primary_id` = '1'");
$resultObject = $db->loadResult();
for inserts:
$db->setQuery("INSERT INTO `table` (`id`, `example`) VALUES ('1', 'abc')");
if (!$db->runQuery()) {
echo $db->getError();
}
*/
class database {
var $_debug = 0;
var $_sql = '';
var $_error = '';
var $_prefix = '';
var $_numrows = 0;
var $_DBhost = 'localhost';
var $_DBuser = "root";
var $_DBpass = "pass1234";
var $_DBname = "cocolani_battle";
var $url_root = "localhost/cocolani";
public function __construct($dbname = 'cocolani_battle', $dbuser = 'root', $dbpsw = 'pass1234', $dbhost = 'localhost', $urlroot = 'localhost/cocolani') {
$this->_DBname = 'cocolani_battle';
$this->_DBuser = 'root';
$this->_DBpass = 'pass1234';
$this->url_root = 'localhost/cocolani';
$this->_DBhost = 'localhost';
$this->_connection = mysqli_connect($this->_DBhost, $this->_DBuser, $this->_DBpass) or die("Couldn't connect to MySQL");
mysqli_select_db($this->_connection, $this->_DBname) or die("Select DB Error: ".mysqli_error());
}
public function __destruct() {
mysqli_close($this->_connection);
}
function debug($debug_level) {
$this->_debug = intval($debug_level);
}
function setQuery($sql) {
/* queries are given in the form of #__table need to replace that with the prefix */
$this->_sql = str_replace('#__', $this->_prefix.'_', $sql);
}
function getQuery() {
return "<pre>" . htmlspecialchars( $this->_sql) . "</pre>";
}
function prepareStatement($sql) {
$this->sql = mysqli_prepare($this->_connection, $sql);
return $this->sql;
}
function runQuery($num_rows=0) {
mysqli_select_db($this->_connection, $this->_DBname) or die("Select DB Error: ".mysqli_error());
$this->_numrows = 0;
$result = mysqli_query($this->_connection, $this->_sql);
if ($this->_debug > 1) echo "<pre>" . htmlspecialchars( $this->_sql) . "</pre>";
if (!$result) {
$this->_error = mysqli_error($this->_connection);
if ($this->_debug) {
echo 'Error: ' . $this->getQuery() . $this->_error;
}
return false;
}
if ($num_rows) {
$this->_numrows = mysqli_num_rows($result);
}
return $result;
}
/* Retrieve Mysql insert id */
function mysqlInsertID() {
$insert_id = mysqli_insert_id();
return $insert_id;
}
/* Escapes special characters while inserting to db */
function db_input($string) {
if (is_array($string)) {
$retArray = array();
foreach($string as $key => $value) {
$value = (get_magic_quotes_gpc() ? stripslashes($value) : $value);
$retArray[$key] = mysqli_real_escape_string($value);
}
return $retArray;
} else {
$string = (get_magic_quotes_gpc() ? stripslashes($string) : $string);
return mysqli_real_escape_string($string);
}
}
function getError() {
return $this->_error;
}
/* Load results into csv formatted string */
function loadCsv() {
if (!($res = $this->runQuery())) {
return null;
}
$csv_string = '';
while ($row = mysqli_fetch_row($res)) {
$line = '';
foreach( $row as $value ) {
if ( ( !isset( $value ) ) || ( $value == "" ) ) {
$value = ",";
} else {
$value = $value. ",";
$value = str_replace( '"' , '""' , $value );
}
$line .= $value;
}
$line = substr($line, 0, -1);
$csv_string .= trim( $line ) . "\n";
}
$csv_string = str_replace( "\r" , "" , $csv_string );
//$csv_string .= implode(",", $row) . "\n";
mysqli_free_result($res);
return $csv_string;
}
/* Load multiple results */
function loadResults($key='' ) {
if (!($res = $this->runQuery())) {
return null;
}
$array = array();
while ($row = mysqli_fetch_object($res)) {
if ($key) {
$array[strtolower($row->$key)] = $row;
} else {
$array[] = $row;
}
}
mysqli_free_result($res);
return $array;
}
function loadResult() {
if (!($res = $this->runQuery())) {
if ($this->_debug) echo 'Error: ' . $this->_error;
return null;
}
$row = mysqli_fetch_object($res);
mysqli_free_result($res);
return $row;
}
/* Load a result field into an array */
function loadArray() {
if (!($res = $this->runQuery())) {
return null;
}
$array = array();
while ($row = mysql_fetch_row($res)) {
$array[] = $row[0];
}
mysqli_free_result($res);
return $array;
}
/* Load a row into an associative an array */
function loadAssoc() {
if (!($res = $this->runQuery())) {
return null;
}
$row = mysqli_fetch_assoc($res);
mysqli_free_result($res);
return $row;
}
/* Return one field */
function loadField() {
if (!($res = $this->runQuery())) {
return null;
}
while ($row = mysql_fetch_row($res)) {
$field = $row[0];
}
mysqli_free_result($res);
return $field;
}
}
/*if ($_SERVER["SERVER_ADDR"] == '127.0.0.1') {
$url_root = "http://cocolani.localhost";
} else {
$url_root = "http://dev.cocolani.com";
}*/
?>
How can I fix this error?
As I mentioned in my comment, you can either use the variables you defined in your settings.php:
$db = new database($db_name, $db_server, $db_user, $db_password, $db_urlroot); // You didn't define $db_urlroot anywhere, but you can define it
OR hard-code it into your class. You're not using the variables you pass in anyway, so there's no need to ask for them.
public function __construct() {

sql and php - is there ant issue with this query or code

hi guys here is my update function it takes some parameters and eveluates them if they are integer or string after that process the values and throws for query sentence...
public function update ($table, $cols, $values, $addition) {
$db = $this->connect();
$i = 0;
$update = '';
if ((is_array($cols)) && (is_array($values))) {
foreach ($cols as $a) {
if (!is_int($values[$i])) {
$update = $a.'="'.$values[$i].'",';
} else {
$update = $a.'='.$values[$i].',';
}
$i++;
}
$update = substr($update, 0, -1);
} else {
if (!is_int($values)) {
$update = $cols.'="'.$values.'",';
} else {
$update = $cols.'='.$values.',';
}
}
echo "update ".$table." set ".$update." ".$addition."<br>";
try {
$sql = $db->prepare("update ".$table." set ".$update." ".$addition);
$sql->execute();
} catch (PDOException $e) {
print $e->getMessage();
}
$db = null;
}
and here are the parameters and the sql query
$this->db->update("brands", "car_count", $brandCarCount[0]+1, "where brand = '".$brand."'");
update brands set car_count=2, where brand = 'alfa_romeo'
i really do not understand what happens, i can not find the problem. it works for other inserting selecting or deleting functions.
i need help!
That is the relevant line which removes the trailing comma:
$update = rtrim($update,',');
and this is the full code:
public function update ($table, $cols, $values, $addition) {
$db = $this->connect();
$i = 0;
$update = '';
if ((is_array($cols)) && (is_array($values))) {
foreach ($cols as $a) {
if (!is_int($values[$i])) {
$update = $a.'="'.$values[$i].'",';
} else {
$update = $a.'='.$values[$i].',';
}
$i++;
}
} else {
if (!is_int($values)) {
$update = $cols.'="'.$values.'",';
} else {
$update = $cols.'='.$values.',';
}
}
$update = rtrim($update,',');
echo "update ".$table." set ".$update." ".$addition."<br>";
try {
$sql = $db->prepare("update ".$table." set ".$update." ".$addition);
$sql->execute();
} catch (PDOException $e) {
print $e->getMessage();
}
$db = null;
}

how to loop through multiple MySQL databases in a PHP script

I have inherited the below code, which creates a web interface for a MySQL database named 'database_name' and defined by the variable $database.
I want to add an additional database to this script, so that the same interface can be created this second database (which is set up in exactly the same way as the first database with the same tables names, etc., but contains different data). Is there a way to make $database a string array which I can loop over for multiple database names?
<?php
class DatabaseInterface {
public $host = "localhost"; //(name or ip address)
public $userName = "aksfhah";
public $passWord = "**********";
public $database = 'database_name';
public $tableData = "measurements";
public $tableMinbins = "minbins";
public $tableHourbins = "hourbins";
public $tableDaybins = "daybins";
public $tableDescriptions = "measurementDescriptions";
public $tableSpecs = "experimentDescriptions";
public $connection;
public function __construct($databaseName = "database_name") {
$this->database = $databaseName;
$this->connect();
}
public function connect($databaseName = null) {
$dbh = mysql_connect($this->host, $this->userName, $this->passWord);
if (is_null($databaseName)) {
mysql_select_db($this->database);
} else {
mysql_select_db($databaseName);
}
$this->connection = $dbh;
return $dbh;
}
public function initializeDatabase() {
$this->createDataTable($this->tableData);
$query = "create table if not exists $this->tableDescriptions (id int auto_increment primary key,type varchar(255),
description varchar(255), experimentname varchar(255), unique Key(description,experimentname)) engine=myisam";
mysql_query($query); //create a table if it does not exist
echo mysql_error(); //report error if one occurred
}
private function createDataTable($tableName) {
$query = "CREATE TABLE IF NOT EXISTS $tableName (
id smallint(5) unsigned NOT NULL,
time datetime NOT NULL,
measurement float DEFAULT NULL,
rebinned tinyint(4) DEFAULT '0',
PRIMARY KEY (id,time),
KEY (rebinned,id)
) ENGINE=MyISAM";
mysql_query($query); //create a table if it does not exist
echo mysql_error(); //report error if one occurred
}
public function insertByDescription($time, $value, $channelDescription, $experimentDescription, $type = "other") {
$sensorID = $this->createIdFromDescription($channelDescription, $experimentDescription, $type);
return $this->insertById($time, $value, $sensorID);
}
public function insertMultipleById($timeArray, $valueArray, $sensorID,$tableName=null) {
if(is_null($tableName)){
$tableName= $this->tableData;
}
if (count($timeArray) == 0)
return 0;
$query = "insert ignore into $tableName (id,time,measurement)
VALUES ";
for ($index = 0; $index < count($timeArray); $index++) {
$timeString = $timeArray[$index]->format("Y-m-d H:i:s");
$value = $valueArray[$index];
$query = $query . "('$sensorID','$timeString','$value'),";
}
$query = substr($query, 0, strlen($query) - 1); //trim final comma
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error();
return false;
} else
return mysql_affected_rows();
}
public function insertMultipleByDescription($timeArray, $valueArray, $channelDescription, $experimentDescription, $type = "other",$tableName=null) {
$sensorID = $this->createIdFromDescription($channelDescription, $experimentDescription, $type);
return $this->insertMultipleById($timeArray, $valueArray, $sensorID,$tableName);
}
public function insertById(DateTime $time, $value, $sensorID) {
$timeString = $time->format("Y-m-d H:i:s");
$query = "insert ignore into $this->tableData (id,time,measurement)
VALUES ('$sensorID','$timeString','$value')";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error();
return false;
} else if (mysql_affected_rows() == 0) {
return false;
} else {
return true;
}
}
public function createIdFromDescription($channelDescription, $experimentDescription, $type) {
$sensorId = $this->getIdFromDescription($channelDescription, $experimentDescription);
if (!$sensorId) {
$query = "insert ignore into $this->tableDescriptions (description,experimentname,type)
VALUES ('$channelDescription','$experimentDescription','$type')";
$result = mysql_query($query);
$sensorId = mysql_insert_id();
}
return $sensorId;
}
public function getIdFromDescription($measurementDescription, $experimentDescription) {
$sensorId = false;
$query = "select id from $this->tableDescriptions where description like '$measurementDescription'
&& experimentname like '$experimentDescription'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
if (mysql_num_rows($result) > 0) {
$row = mysql_fetch_array($result);
$sensorId = $row['id'];
}
return $sensorId;
}
function getDataById($id, $startDate, $endDate, $interval = "") {
$data = array();
$startDateString = $startDate->format("Y-m-d H:i:s");
$endDateString = $endDate->format("Y-m-d H:i:s");
$query = "select time,measurement from $this->tableData where id='$id' && time>='$startDateString' && time <='$endDateString' order by time asc " . $interval = "" ? "" : "group by $interval";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
//$time = new DateTime($row['time']);
$data[] = array($row['time'], $row['measurement'] * 1);
}
return $data;
}
public function getMostRecentData($id, $table) {
$query = "select date(max(time)) as time,measurement from $table where id='$id'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
} elseif (mysql_num_rows($result) > 0) {
$row = mysql_fetch_array($result);
return $row;
} else {
return false;
}
}
public function getExperimentList() {
$list = array();
$query = "select distinct experimentname from $this->tableDescriptions";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
$list[] = $row['experimentname'];
}
return $list;
}
public function getChannelList($experimentDescription) {
$list = array();
$query = "select id,description,type from $this->tableDescriptions where experimentname='$experimentDescription'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
while ($row = mysql_fetch_array($result)) {
$list[$row['description']] = array("id" => $row['id'], "type" => $row['type']);
}
return $list;
}
public function getDescriptionFromId($id) {
$query = "select * from $this->tableDescriptions where id='$id'";
$result = mysql_query($query);
if (mysql_error()) {
echo mysql_error(); //report error if one occurred
return false;
}
if (mysql_num_fields($result) > 0) {
$row = mysql_fetch_array($result);
return array($row['type'], $row['description'], $row['experimentname']);
} else {
return false;
}
}
public function getDisplayName($experimentName) {
$query = "select displayName from $this->tableSpecs where experimentName='$experimentName'";
$result = mysql_query($query);
echo mysql_error();
$row = mysql_fetch_array($result);
if ($row) {
return $row['displayName'];
} else {
return false;
}
}
public function simpleQuery($query) {
$result = mysql_query($query);
echo mysql_error();
if ($result) {
$row = mysql_fetch_array($result);
if ($row) {
return $row[0];
} else {
return FALSE;
}
} else {
return FALSE;
}
}
public function rebin($tableSource, $tableTarget, $numSeconds, $sum = false) {
$this->createDataTable($tableTarget);
echo "Updating $tableSource to set rebinned from 0 to 2...";
$query = "update $tableSource set rebinned=2 where rebinned =0;";
mysql_query($query);
echo mysql_error();
echo "Done.\n";
$numRows = mysql_affected_rows();
echo "Found $numRows records in $tableSource that need rebinning...\n";
$query = "select id,from_unixtime(floor(unix_timestamp(min(time))/$numSeconds)*$numSeconds) as mintime from $tableSource where rebinned=2 group by id;";
$result = mysql_query($query);
echo mysql_error();
if ($result) {
while ($row = mysql_fetch_array($result)) {
$id = $row['id'];
$mintime = $row['mintime'];
echo $id . "...";
$query = "INSERT INTO $tableTarget (id,time,measurement,rebinned)
SELECT id,from_unixtime(floor(unix_timestamp(time)/$numSeconds)*$numSeconds)," . ($sum ? "sum" : "avg") . "(measurement) as measurement,0
FROM $tableSource WHERE id=$id && time>='$mintime'
GROUP BY id,floor(unix_timestamp(time)/$numSeconds)
ON DUPLICATE KEY UPDATE measurement=values(measurement), rebinned=0;";
mysql_query($query);
//echo $query;
echo mysql_error();
echo "Done.\n";
}
echo "Updating $tableSource to set rebinned from 2 to 1...";
$query = "update $tableSource set rebinned=1 where rebinned =2;";
mysql_query($query);
echo mysql_error();
echo "Done.\n";
}
}
public function getDCPower($experimentName, $startDate, $endDate) {
$out = array();
$query = $this->buildDCPowerQuery($experimentName, $this->tableMinbins);
if ($query) {
if ($startDate != "") {
$query = $query . " && m0.time>='$startDate' ";
}
if ($endDate != "") {
$query = $query . " && m0.time<='$endDate' ";
}
echo $query;
$result = mysql_query($query);
echo mysql_error();
while ($row = mysql_fetch_array($result)) {
// echo $row['time'].", ".$row['power']."\n";
$out[] = array($row['time'], $row['power'] + 0);
}
return $out;
} else {
return FALSE;
}
}
}
?>
Is there a way to make $database a string array which I can loop over for multiple database names?
No, it does not work that way. The script you have defines a class. You have to look in the file that uses that class, where there will be something like
$interface = new DatabaseInterface("database1");
There you'll be able to do things such as
$interface = array();
$interface[0] = new DatabaseInterface("database1");
$interface[1] = new DatabaseInterface("database2");
and use two instances of the interface against the two databases.

Connect to MySQL database using PHP OOP concept

I'm writing a class and handful of functions to connect to the database and retrieve the information from the tables. I went through previous posts having similar titles, but most of them have written using mysql functions and I am using mysqli functions.
I want somebody who can go through this simple script and let me know where I am making my mistake.
This is my class.connect.php:
<?php
class mySQL{
var $host;
var $username;
var $password;
var $database;
public $dbc;
public function connect($set_host, $set_username, $set_password, $set_database)
{
$this->host = $set_host;
$this->username = $set_username;
$this->password = $set_password;
$this->database = $set_database;
$this->dbc = mysqli_connect($this->host, $this->username, $this->password, $this->database) or die('Error connecting to DB');
}
public function query($sql)
{
return mysqli_query($this->dbc, $sql) or die('Error querying the Database');
}
public function fetch($sql)
{
$array = mysqli_fetch_array($this->query($sql));
return $array;
}
public function close()
{
return mysqli_close($this->dbc);
}
}
?>
This is my index.php:
<?php
require_once ("class.connect.php");
$connection = new mySQL();
$connection->connect('localhost', 'myDB', 'joker', 'names_list');
$myquery = "SELECT * FROM list";
$query = $connection->query($myquery);
while($array = $connection->fetch($query))
{
echo $array['first_name'] . '<br />';
echo $array['last_name'] . '<br />';
}
$connection->close();
?>
I am getting the error saying that Error querying the Database.
Few problems :-
you don't die without provide a proper mysql error (and is good practice to exit gracefully)
fetch method is only FETCH the first row
mysqli have OO method, why you still using procedural function?
The problem is either this:
public function fetch($sql)
{
$array = mysqli_fetch_array($this->query($sql));
return $array;
}
or this:
while($array = $connection->fetch($query))
Because you are using the result from the query to query again. Basically, you are doing:
$r = mysqli_query($this->dbc, $sql);
$array = mysqli_fetch_array(mysqli_query($this->dbc, $r));
And you are getting an error, because $r is not a query string. When it's converted to a string, it's a "1" (from your other comment).
Try changing the function to (changed name of variable so you can see the difference):
public function fetch($result)
{
return mysqli_fetch_array($result);
}
or just call the function directly.
If you don't do your own db abstraction for learning php and mysql, you can use Medoo (http://medoo.in/).
It's a free and tiny db framework, that could save a huge work and time.
Obviously an error occurs on SELECT * FROM list you can use mysqli_error to find the error:
return mysqli_query($this->dbc, $sql) or die('Error:'.mysqli_error($this->dbc));
This will display the exact error message and will help you solve your problem.
Try to check this
https://pramodjn2.wordpress.com/
$database = new db();
$query = $database->select(‘user’);
$st = $database->result($query);
print_r($st);
class db {
public $server = ‘localhost';
public $user = ‘root';
public $passwd = ‘*****';
public $db_name = ‘DATABASE NAME';
public $dbCon;
public function __construct(){
$this->dbCon = mysqli_connect($this->server, $this->user, $this->passwd, $this->db_name);
}
public function __destruct(){
mysqli_close($this->dbCon);
}
/* insert function table name, array value
$values = array(‘first_name’ => ‘pramod’,’last_name’=> ‘jain’);
*/
public function insert($table,$values)
{
$sql = “INSERT INTO $table SET “;
$c=0;
if(!empty($values)){
foreach($values as $key=>$val){
if($c==0){
$sql .= “$key='”.htmlentities($val, ENT_QUOTES).”‘”;
}else{
$sql .= “, $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}
$c++;
}
}else{
return false;
}
$this->dbCon->query($sql) or die(mysqli_error());
return mysqli_insert_id($this->dbCon);
}
/* update function table name, array value
$values = array(‘first_name’ => ‘pramod’,’last_name’=> ‘jain’);
$condition = array(‘id’ =>5,’first_name’ => ‘pramod!’);
*/
public function update($table,$values,$condition)
{
$sql=”update $table SET “;
$c=0;
if(!empty($values)){
foreach($values as $key=>$val){
if($c==0){
$sql .= “$key='”.htmlentities($val, ENT_QUOTES).”‘”;
}else{
$sql .= “, $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}
$c++;
}
}
$k=0;
if(!empty($condition)){
foreach($condition as $key=>$val){
if($k==0){
$sql .= ” WHERE $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}else{
$sql .= ” AND $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}
$k++;
}
}else{
return false;
}
$result = $this->dbCon->query($sql) or die(mysqli_error());
return $result;
}
/* delete function table name, array value
$where = array(‘id’ =>5,’first_name’ => ‘pramod’);
*/
public function delete($table,$where)
{
$sql = “DELETE FROM $table “;
$k=0;
if(!empty($where)){
foreach($where as $key=>$val){
if($k==0){
$sql .= ” where $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}else{
$sql .= ” AND $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}
$k++;
}
}else{
return false;
}
$del = $result = $this->dbCon->query($sql) or die(mysqli_error());
if($del){
return true;
}else{
return false;
}
}
/* select function
$rows = array(‘id’,’first_name’,’last_name’);
$where = array(‘id’ =>5,’first_name’ => ‘pramod!’);
$order = array(‘id’ => ‘DESC’);
$limit = array(20,10);
*/
public function select($table, $rows = ‘*’, $where = null, $order = null, $limit = null)
{
if($rows != ‘*’){
$rows = implode(“,”,$rows);
}
$sql = ‘SELECT ‘.$rows.’ FROM ‘.$table;
if($where != null){
$k=0;
foreach($where as $key=>$val){
if($k==0){
$sql .= ” where $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}else{
$sql .= ” AND $key='”.htmlentities($val, ENT_QUOTES).”‘”;
}
$k++;
}
}
if($order != null){
foreach($order as $key=>$val){
$sql .= ” ORDER BY $key “.htmlentities($val, ENT_QUOTES).””;
}
}
if($limit != null){
$limit = implode(“,”,$limit);
$sql .= ” LIMIT $limit”;
}
$result = $this->dbCon->query($sql);
return $result;
}
public function query($sql){
$result = $this->dbCon->query($sql);
return $result;
}
public function result($result){
$row = $result->fetch_array();
$result->close();
return $row;
}
public function row($result){
$row = $result->fetch_row();
$result->close();
return $row;
}
public function numrow($result){
$row = $result->num_rows;
$result->close();
return $row;
}
}
The mysqli_fetch_array function in your fetch method requires two parameters which are the SQL result and the kind of array you intend to return. In my case i use MYSQLI_ASSOC.
That is it should appear like this:
public function fetch($sql)
{
$array = mysqli_fetch_array($this->query($sql), MYSQLI_ASSOC);
return $array;
}
**classmysql.inc.php**
<?php
class dbclass {
var $CONN;
function dbclass() { //constructor
$conn = mysql_connect(SERVER_NAME,USER_NAME,PASSWORD);
//$conn = mysql_connect(localhost,root,"","");
if(!$conn)
{ $this->error("Connection attempt failed"); }
if(!mysql_select_db(DB_NAME,$conn))
{ $this->error("Database Selection failed"); }
$this->CONN = $conn;
return true;
}
//_____________close connection____________//
function close(){
$conn = $this->CONN ;
$close = mysql_close($conn);
if(!$close){
$this->error("Close Connection Failed"); }
return true;
}
function error($text) {
$no = mysql_errno();
$msg = mysql_error();
echo "<hr><font face=verdana size=2>";
echo "<b>Custom Message :</b> $text<br><br>";
echo "<b>Error Number :</b> $no<br><br>";
echo "<b>Error Message :</b> $msg<br><br>";
echo "<hr></font>";
exit;
}
//_____________select records___________________//
function select ($sql=""){
if(empty($sql)) { return false; }
if(!eregi("^select",$sql)){
echo "Wrong Query<hr>$sql<p>";
return false; }
if(empty($this->CONN)) { return false; }
$conn = $this->CONN;
$results = #mysql_query($sql,$conn);
if((!$results) or empty($results)) { return false; }
$count = 0;
$data = array();
while ( $row = mysql_fetch_array($results)) {
$data[$count] = $row;
$count++; }
mysql_free_result($results);
return $data;
}
//________insert record__________________//
function insert ($sql=""){
if(empty($sql)) { return false; }
if(!eregi("^insert",$sql)){ return false; }
if(empty($this->CONN)){ return false; }
$conn = $this->CONN;
$results = #mysql_query($sql,$conn);
if(!$results){
$this->error("Insert Operation Failed..<hr>$sql<hr>");
return false; }
$id = mysql_insert_id();
return $id;
}
//___________edit and modify record___________________//
function edit($sql="") {
if(empty($sql)) { return false; }
if(!eregi("^update",$sql)){ return false; }
if(empty($this->CONN)){ return false; }
$conn = $this->CONN;
$results = #mysql_query($sql,$conn);
$rows = 0;
$rows = #mysql_affected_rows();
return $rows;
}
//____________generalize for all queries___________//
function sql_query($sql="") {
if(empty($sql)) { return false; }
if(empty($this->CONN)) { return false; }
$conn = $this->CONN;
$results = mysql_query($sql,$conn) or $this->error("Something wrong in query<hr>$sql<hr>");
if(!$results){
$this->error("Query went bad ! <hr>$sql<hr>");
return false; }
if(!eregi("^select",$sql)){return true; }
else {
$count = 0;
$data = array();
while ( $row = mysql_fetch_array($results))
{ $data[$count] = $row;
$count++; }
mysql_free_result($results);
return $data;
}
}
function extraqueries($sql="") {
if(empty($sql)) { return false; }
if(empty($this->CONN)) { return false; }
$conn = $this->CONN;
$results = mysql_query($sql,$conn) or $this->error("Something wrong in query<hr>$sql<hr>");
if(!$results){
$this->error("Query went bad ! <hr>$sql<hr>");
return false; }
else {
$count = 0;
$data = array();
while ( $row = mysql_fetch_array($results))
{ $data[$count] = $row;
$count++; }
mysql_free_result($results);
return $data;
}
}
}
?>
**config.inc.php**
<?php
ini_set("memory_limit","70000M");
ini_set('max_execution_time', 900);
ob_start();
session_start();
error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
############################################
# Database Server
############################################
if($_SERVER['HTTP_HOST']=="localhost")
{
define("DB_NAME","DB_NAME");
define("SERVER_NAME","SERVER_NAME");
define("USER_NAME","USER_NAME");
define("PASSWORD","PASSWORD");
}
else
{
define("DB_NAME","DB_NAME");
define("SERVER_NAME","SERVER_NAME");
define("USER_NAME","USER_NAME");
define("PASSWORD","PASSWORD");
}
#############################################
# File paths
#############################################
// For the Database file path
include("system/classmysql.inc.php");
//For the inc folders
define("INC","inc/");
//For the Function File of the pages folders
define("FUNC","func/");
//For the path of the system folder
define("SYSTEM","system/");
$table_prefix = 'dep_';
################################################################
# Database Class
################################################################
$obj_db = new dbclass();
?>
**Function Page**
<?php
// IF admin is not logged in
if(!isset($_SESSION['session_id']))
{
header("location:index.php");
}
$backpage = 'page.php?type=staff&';
if(isset($_REQUEST['endbtn']) && trim($_REQUEST['endbtn']) == "Back")
{
header("location:".$backpage);
die();
}
// INSERT into database.
if(isset($_REQUEST['submit']) && trim($_REQUEST['submit']) == "Submit")
{
$pass = addslashes(trim($_REQUEST['password']));
$password = encrypt($pass, "deppro");
$username = addslashes(trim($_REQUEST['username']));
$sql = "select * from ".$table_prefix."users where `UserName` ='".$username."'";
$result = $obj_db->select($sql);
if(count($result) == 0)
{
$insert="INSERT INTO ".$table_prefix."users (`UserName`)VALUES ('".$username."')";
$sql=$obj_db->insert($insert);
$newuserid = mysql_insert_id($obj_db->CONN);
}
header("location:".$backpage."msg=send&alert=2");
die();
}
// DELETE record from database
if(isset($_REQUEST['action']) && trim($_REQUEST['action'])==3)
{
if(isset($_REQUEST['id']) && trim($_REQUEST['id']!=""))
{
$id = site_Decryption($_REQUEST['id']);
$sql_del = "Delete from ".$table_prefix."users where StaffID ='$id'";
$del = $obj_db->sql_query($sql_del);
header("location:".$backpage."msg=delete&alert=2");
die();
}
}
// UPDATE the record
$action=1;
if((isset($_REQUEST['action']) && trim($_REQUEST['action'])==2) && (!(isset($_REQUEST['submit']) && trim($_REQUEST['submit']) == "Submit")))
{
if(isset($_REQUEST['id']) && trim($_REQUEST['id']!=""))
{
$id = site_Decryption($_REQUEST['id']);
//$id = $_SESSION['depadmin_id'];
$sql = "select * from ".$table_prefix."users where StaffID ='$id'";
$result = $obj_db->select($sql);
if($result)
{
foreach($result as $row)
{
$title = stripslashes($row['StaffTitle']);
$action=2;
}
}
if(isset($_REQUEST['submit']) && trim($_REQUEST['submit']) == "Update")
{
$title = addslashes(trim($_REQUEST['title']));
$sql_upd ="UPDATE ".$table_prefix."users SET `StaffTitle` = '$title' WHERE StaffID ='$id'";
$result = $obj_db->sql_query($sql_upd);
$action=1;
header("location:".$backpage."msg=edited&alert=2");
die();
}
}
}
if(isset($_REQUEST['vid']) && trim($_REQUEST['vid']!=""))
{
$id = site_Decryption($_REQUEST['vid']);
$sql = "select * from ".$table_prefix."users where StaffID ='$id'";
$result = $obj_db->select($sql);
if($result)
{
foreach($result as $row)
{
$username = stripslashes($row['UserName']);
}
}
}
?>
<td class="center"><span class="editbutton"> </span> <span class="deletebutton"> </span> <a class="lightbox" title="View" href="cpropertyview.php?script=view&vid=<?php echo site_Encryption($sql[$j]['PropertyID']); ?>&lightbox[width]=55p&lightbox[height]=60p"><span class="viewbutton"> </span></a></td>

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