when i run my program it keeps throwing these errors - php

Question

Warning: Missing argument 1 for MysqlDB::__construct(), called in C:\xampp\htdocs\ripplezsolution\index.php on line 9 and defined in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 10
Warning: Missing argument 2 for MysqlDB::__construct(), called in C:\xampp\htdocs\ripplezsolution\index.php on line 9 and defined in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 10
Warning: Missing argument 3 for MysqlDB::__construct(), called in C:\xampp\htdocs\ripplezsolution\index.php on line 9 and defined in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 10
Warning: Missing argument 4 for MysqlDB::__construct(), called in C:\xampp\htdocs\ripplezsolution\index.php on line 9 and defined in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 10
Notice: Undefined variable: host in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 11
Notice: Undefined variable: username in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 11
Notice: Undefined variable: password in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 11
Notice: Undefined variable: db in C:\xampp\htdocs\ripplezsolution\phpinclude\include\MySqlDb.php on line 11
This is my MysqlDB.php code
<?php
class MysqlDB {
protected $_mysql;
protected $_where = array();
protected $_query;
protected $_paramTypeList;
public function __construct ($host, $username, $password, $db) {
$this->_mysql = new mysqli($host, $username, $password, $db)
or die('There was a problem connecting to the database');
}
public function query($query)
{
$this->_query = filter_var($query, FILTER_SANITIZE_STRING);
$stmt = $this->_prepareQuery();
$stmt->execute();
$results = $this->_dynamicBindResults($stmt);
return $results;
}
/**
* A convenient SELECT * function.
*
* #param string $tableName The name of the database table to work with.
* #param int $numRows The number of rows total to return.
* #return array Contains the returned rows from the select query.
*/
public function get($tableName, $numRows = NULL)
{
$this->_query = "SELECT * FROM $tableName";
$stmt = $this->_buildQuery($numRows);
$stmt->execute();
$results = $this->_dynamicBindResults($stmt);
return $results;
}
/**
*
* #param <string $tableName The name of the table.
* #param array $insertData Data containing information for inserting into the DB.
* #return boolean Boolean indicating whether the insert query was completed succesfully.
*/
public function insert($tableName, $insertData)
{
$this->_query = "INSERT into $tableName";
$stmt = $this->_buildQuery(NULL, $insertData);
$stmt->execute();
if ($stmt->affected_rows)
return true;
}
public function update($tableName, $tableData)
{
$this->_query = "UPDATE $tableName SET ";
$stmt = $this->_buildQuery(NULL, $tableData);
$stmt->execute();
if ($stmt->affected_rows)
return true;
}
public function delete($tableName) {
$this->_query = "DELETE FROM $tableName";
$stmt = $this->_buildQuery();
$stmt->execute();
if ($stmt->affected_rows)
return true;
}
public function where($whereProp, $whereValue)
{
$this->_where[$whereProp] = $whereValue;
}
protected function _determineType($item)
{
switch (gettype($item)) {
case 'string':
return 's';
break;
case 'integer':
return 'i';
break;
case 'blob':
return 'b';
break;
case 'double':
return 'd';
break;
}
}
protected function _buildQuery($numRows = NULL, $tableData = false)
{
$hasTableData = null;
if (gettype($tableData) === 'array') {
$hasTableData = true;
}
// Did the user call the "where" method?
if (!empty($this->_where)) {
$keys = array_keys($this->_where);
$where_prop = $keys[0];
$where_value = $this->_where[$where_prop];
// if update data was passed, filter through
// and create the SQL query, accordingly.
if ($hasTableData) {
$i = 1;
$pos = strpos($this->_query, 'UPDATE');
if ( $pos !== false) {
foreach ($tableData as $prop => $value) {
// determines what data type the item is, for binding purposes.
$this->_paramTypeList .= $this->_determineType($value);
// prepares the reset of the SQL query.
if ($i === count($tableData)) {
$this->_query .= $prop . " = ? WHERE " . $where_prop . "= " . $where_value;
} else {
$this->_query .= $prop . ' = ?, ';
}
$i++;
}
}
} else {
$this->_paramTypeList = $this->_determineType($where_value);
$this->_query .= " WHERE " . $where_prop . "= ?";
}
}
if ($hasTableData) {
$pos = strpos($this->_query, 'INSERT');
if ($pos !== false) {
$keys = array_keys($tableData);
$values = array_values($tableData);
$num = count($keys);
foreach ($values as $key => $val) {
$values[$key] = "'{$val}'";
$this->_paramTypeList .= $this->_determineType($val);
}
$this->_query .= '(' . implode($keys, ', ') . ')';
$this->_query .= ' VALUES(';
while ($num !== 0) {
($num !== 1) ? $this->_query .= '?, ' : $this->_query .= '?)';
$num--;
}
}
}
if (isset($numRows)) {
$this->_query .= " LIMIT " . (int) $numRows;
}
$stmt = $this->_prepareQuery();
if ($hasTableData) {
$args = array();
$args[] = $this->_paramTypeList;
foreach ($tableData as $prop => $val) {
$args[] = &$tableData[$prop];
}
call_user_func_array(array($stmt, 'bind_param'), $args);
} else {
if ($this->_where)
$stmt->bind_param($this->_paramTypeList, $where_value);
}
return $stmt;
}
protected function _dynamicBindResults($stmt)
{
$parameters = array();
$results = array();
$meta = $stmt->result_metadata();
while ($field = $meta->fetch_field()) {
$parameters[] = &$row[$field->name];
}
call_user_func_array(array($stmt, 'bind_result'), $parameters);
while ($stmt->fetch()) {
$x = array();
foreach ($row as $key => $val) {
$x[$key] = $val;
}
$results[] = $x;
}
return $results;
}
protected function _prepareQuery()
{
if (!$stmt = $this->_mysql->prepare($this->_query)) {
trigger_error("Problem preparing query", E_USER_ERROR);
}
return $stmt;
}
public function __destruct()
{
$this->_mysql->close();
}
}
?>
and i'm calling a function insert() through index.php
<?php
ob_start();
session_start();
require_once("phpinclude/include/membersite_config.php");
require_once("phpinclude/include/MySqlDB.php");
$DB = new MysqlDB('172.90.13.97','king','mi*****hhh','kxxxx_database');
if (isset($_GET['action'])){$action = htmlentities($_GET['action']);}
else{$action = NULL;}
$mysqldb = new MysqlDB();
?>
<?php if($action=='add_cart'){?>
<?php $data=array($arrival, $departure, $result, $roomID, $category_price); $table='tb_cart';?>
<?php $this->mysqldb->insert($table, $data); ?>
<?php }?>

Answer 1

Problem is in this line
$mysqldb = new MysqlDB();
The constructor requries arguments which are not passed. You need to pass $host, $username, $password, $db to constructor.
Your code acutally makes no sense. You could use $DB instead of creating new object. You also use $this->mysqldb in no object context. There are plenty of errors in your code.
To fix:
Remove this line $mysqldb = new MysqlDB();
Change <?php $this->mysqldb->insert($table, $data); ?> to $DB->insert($table, $data);
Script should +- look like:
<?php
ob_start();
session_start();
require_once("phpinclude/include/membersite_config.php");
require_once("phpinclude/include/MySqlDB.php");
$DB = new MysqlDB('172.90.13.97','king','mi*****hhh','kxxxx_database');
$action = !empty($_GET['action']) ? htmlentities($_GET['action']) : null;
if ($action == 'add_cart') {
$data = array(
'arrival' => $arrival,
'departure' => $departure,
'result' => $result,
'roomID' => $roomID,
'category_price' => $category_price
);
$DB->insert('tb_cart', $data);
}