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<?php
/*
* @Author Rory Standley <rorystandley@gmail.com>
* @Version 1.0
* @Package Database
*/
define('DOMAIN_URL', ''); /* chnage to your domain here - don't forget to add forward slash at the end of the URL like this "/" */
define('ALLOW_MODIFICATION', 1);
define('JWT_SECRET_KEY', 'replace_with_your_strong_jwt_secret_key'); /* chnage to your secret key here set it to anything you like*/
class Database
{
/*
* Create variables for credentials to MySQL database
* The variables have been declared as private. This
* means that they will only be available with the
* Database class
*/
private $db_host = ""; // Change as required
private $db_user = ""; // Change as required
private $db_pass = ""; // Change as required
private $db_name = ""; // Change as required
/*
* Extra variables that are required by other function such as boolean con variable
*/
private $con = false; // Check to see if the connection is active
private $myconn = ""; // This will be our mysqli object
private $result = array(); // Any results from a query will be stored here
private $myQuery = ""; // used for debugging process with SQL return
private $numResults = ""; // used for returning the number of rows
// Function to make connection to database
public function connect()
{
if (!$this->con) {
$this->myconn = new mysqli($this->db_host, $this->db_user, $this->db_pass, $this->db_name); // mysql_connect() with variables defined at the start of Database class
if ($this->myconn->connect_errno > 0) {
array_push($this->result, $this->myconn->connect_error);
return false; // Problem selecting database return FALSE
} else {
$this->con = true;
return true; // Connection has been made return TRUE
}
} else {
return true; // Connection has already been made return TRUE
}
}
// Function to disconnect from the database
public function disconnect()
{
// If there is a connection to the database
if ($this->con) {
// We have found a connection, try to close it
if ($this->myconn->close()) {
// We have successfully closed the connection, set the connection variable to false
$this->con = false;
// Return true tjat we have closed the connection
return true;
} else {
// We could not close the connection, return false
return false;
}
}
}
public function sql($sql)
{
$this->myconn->query("SET NAMES utf8"); /* manually added for supporting utf 8 unicode characters */
$query = $this->myconn->query($sql);
// echo $query;
$this->myQuery = $sql; // Pass back the SQL
if ($query) {
// If the query returns >= 1 assign the number of rows to numResults
$this->numResults = 0;
if (isset($query->num_rows) && ($query->num_rows > 0)) {
$this->numResults = $query->num_rows;
}
// Loop through the query results by the number of rows returned
for ($i = 0; $i < $this->numResults; $i++) {
$r = $query->fetch_array();
$key = array_keys($r);
// $value = array_values($r);
// print_r($key);
// print_r($value);
for ($x = 0; $x < count($key); $x++) {
// print_r($key);
// Sanitizes keys so only alphavalues are allowed
if (!is_int($key[$x])) {
if ($query->num_rows >= 1) {
$this->result[$i][$key[$x]] = $r[$key[$x]];
} else {
$this->result = null;
}
}
}
}
return true; // Query was successful
} else {
array_push($this->result, $this->myconn->error);
return false; // No rows where returned
}
}
// Function to SELECT from the database
public function select($table, $rows = '*', $join = null, $where = null, $order = null, $limit = null)
{
// Create query from the variables passed to the function
$q = 'SELECT ' . $rows . ' FROM ' . $table;
// echo $q;
if ($join != null) {
$q .= ' JOIN ' . $join;
}
if ($where != null) {
$q .= ' WHERE ' . $where;
}
if ($order != null) {
$q .= ' ORDER BY ' . $order;
}
if ($limit != null) {
$q .= ' LIMIT ' . $limit;
}
// echo $table;
$this->myQuery = $q; // Pass back the SQL
// Check to see if the table exists
if ($this->tableExists($table)) {
// The table exists, run the query
$query = $this->myconn->query($q);
if ($query) {
// If the query returns >= 1 assign the number of rows to numResults
$this->numResults = $query->num_rows;
// Loop through the query results by the number of rows returned
for ($i = 0; $i < $this->numResults; $i++) {
$r = $query->fetch_array();
$key = array_keys($r);
for ($x = 0; $x < count($key); $x++) {
// Sanitizes keys so only alphavalues are allowed
if (!is_int($key[$x])) {
if ($query->num_rows >= 1) {
$this->result[$i][$key[$x]] = $r[$key[$x]];
} else {
$this->result[$i][$key[$x]] = null;
}
}
}
}
return true; // Query was successful
} else {
array_push($this->result, $this->myconn->error);
return false; // No rows where returned
}
} else {
return false; // Table does not exist
}
}
// Function to insert into the database
public function insert($table, $params = array())
{
$this->myconn->query("SET NAMES utf8"); /* manually added for supporting utf 8 unicode characters */
// Check to see if the table exists
if ($this->tableExists($table)) {
$sql = 'INSERT INTO `' . $table . '` (`' . implode('`, `', array_keys($params)) . '`) VALUES ("' . implode('", "', $params) . '")';
// echo $sql;
$this->myQuery = $sql; // Pass back the SQL
// Make the query to insert to the database
if ($ins = $this->myconn->query($sql)) {
array_push($this->result, $this->myconn->insert_id);
// print_r($this->result);
return true; // The data has been inserted
} else {
array_push($this->result, $this->myconn->error);
return false; // The data has not been inserted
}
} else {
return false; // Table does not exist
}
}
//Function to delete table or row(s) from database
public function delete($table, $where = null)
{
// Check to see if table exists
if ($this->tableExists($table)) {
// The table exists check to see if we are deleting rows or table
if ($where == null) {
$delete = 'DROP TABLE ' . $table; // Create query to delete table
} else {
$delete = 'DELETE FROM ' . $table . ' WHERE ' . $where;
// echo $sql;// Create query to delete rows
}
// Submit query to database
if ($del = $this->myconn->query($delete)) {
array_push($this->result, $this->myconn->affected_rows);
$this->myQuery = $delete; // Pass back the SQL
return true; // The query exectued correctly
} else {
array_push($this->result, $this->myconn->error);
return false; // The query did not execute correctly
}
} else {
return false; // The table does not exist
}
}
// Function to update row in database
public function update($table, $params = array(), $where)
{
// Check to see if table exists
if ($this->tableExists($table)) {
// Create Array to hold all the columns to update
$args = array();
foreach ($params as $field => $value) {
// Seperate each column out with it's corresponding value
$args[] = $field . '="' . $value . '"';
}
// Create the query
$sql = 'UPDATE ' . $table . ' SET ' . implode(',', $args) . ' WHERE ' . $where;
// echo $sql;
// Make query to database
$this->myQuery = $sql; // Pass back the SQL
if ($query = $this->myconn->query($sql)) {
array_push($this->result, $this->myconn->affected_rows);
return true; // Update has been successful
} else {
array_push($this->result, $this->myconn->error);
return false; // Update has not been successful
}
} else {
return false; // The table does not exist
}
}
// Private function to check if table exists for use with queries
private function tableExists($table)
{
$tablesInDb = $this->myconn->query('SHOW TABLES FROM ' . $this->db_name . ' LIKE "' . $table . '"');
if ($tablesInDb) {
if ($tablesInDb->num_rows == 1) {
return true; // The table exists
} else {
array_push($this->result, $table . " does not exist in this database");
return false; // The table does not exist
}
}
}
// Public function to return the data to the user
public function getResult()
{
$val = $this->result;
$this->result = array();
return $val;
}
//Pass the SQL back for debugging
public function getSql()
{
$val = $this->myQuery;
$this->myQuery = array();
return $val;
}
//Pass the number of rows back
public function numRows()
{
$val = $this->numResults;
$this->numResults = array();
return $val;
}
// Escape your string
public function escapeString($data)
{
return $this->myconn->real_escape_string($data);
}
}
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