Php 使用对象的Mysqli连接
我刚开始将我的项目从mysql切换到mysqli。我所做的就是创建一个类db和函数connect。如何创建对象并重用它 这是我的代码： 类别数据库：Php 使用对象的Mysqli连接,php,mysql,mysqli,Php,Mysql,Mysqli,我刚开始将我的项目从mysql切换到mysqli。我所做的就是创建一个类db和函数connect。如何创建对象并重用它 这是我的代码： 类别数据库： class db { //global var session private $biz; //constructor function db (&$b) { $this->biz = $b; $this->connect();
class db {
//global var session
private $biz;
//constructor
function db (&$b) {
$this->biz = $b;
$this->connect();
}
function connect() {
mysqli_connect(
$this->biz->_db['host']
, $this->biz->_db['username']
, $this->biz->_db['password']
,$this->biz->_db['database']
) or die("Unable to connect to database");
//$cont=mysqli_select_db($con,$this->biz->_db['database']) or die("Unable to select database: {$this->biz->_db['database']}");
//return $connt;
}
/*
This function will perform a simple query and return all the results
@return object Object containing the rows, num_rows and result
@param string $sql The SQL query
*/
function query($sql) {
$result = new fetchQuery($sql);
return $result;
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function updateQuery($sql) {
return new updateQuery($sql);
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function insertQuery($sql) {
return new insertQuery($sql);
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function deleteQuery($sql) {
return new deleteQuery($sql);
}
/*
This function will automatically decide if data is being updated or inserted
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
/*
This function will perform an update query from the post data that has the correct form - fields matching table field names
@return object Object containing num rows affected and result
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
function autoUpdate($data, $table,$wheredata) {
//id is required, return false if not found
if (!isset($wheredata))
{
return false;
}
$sql = "
UPDATE
`$table`
SET
";
foreach ($data as $key => $value) {
$sql .= " `$key` = '$value' ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= " WHERE 0=0 ";
foreach ($wheredata as $key => $value) {
$sql .= " and `$key` = '$value' ";
}
return new updateQuery($sql);
}
/*
This function will perform an insert query from the matching form table
@return object Object containing num rows affected and result
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
function autoInsert($data, $table, $validate = false)
{
$_fields = array();
$_values = array();
foreach ($data as $field => $value) {
$_fields[] = $field;
$_values[] = $value;
}
$sql = "
INSERT INTO
`$table`
(
";
foreach($_fields as $field) {
$sql .= "`$field` ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= "
) VALUES (
";
foreach($_values as $value) {
$sql .= "'$value' ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= "
)
";
return new insertQuery($sql);
}
/*
This function will perform an auto delete query from the matching form table
@return object Object containing num rows affected and result
@param int $id The related id
@param string $table The table to be affected
*/
function autoDelete($sql) {
return new deleteQuery($sql); }
}
class fetchQuery {
public $result;
public $num = 0;
public $rows = array();
public $error = false;
function fetchQuery($sql) {
$this->result = mysql_query($sql);
if ($this->result) {
$this->num = mysql_num_rows($this->result);
if ($this->num) {
while($row = mysql_fetch_assoc($this->result)) {
$this->rows[] = $row;
}
} else {
$this->result = false;
}
} else {
$this->result = false;
$this->error = mysql_error();
}
}
class db {
//global var session
private $biz;
//constructor
function db (&$b) {
$this->biz = $b;
$this->connect();
}
function connect() {
mysqli_connect(
$this->biz->_db['host']
, $this->biz->_db['username']
, $this->biz->_db['password']
,$this->biz->_db['database']
) or die("Unable to connect to database");
//$cont=mysqli_select_db($con,$this->biz->_db['database']) or die("Unable to select database: {$this->biz->_db['database']}");
//return $connt;
}
/*
This function will perform a simple query and return all the results
@return object Object containing the rows, num_rows and result
@param string $sql The SQL query
*/
function query($sql) {
$result = new fetchQuery($sql);
return $result;
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function updateQuery($sql) {
return new updateQuery($sql);
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function insertQuery($sql) {
return new insertQuery($sql);
}
/*
This function will perform a query given the sql
@return object Object containing num rows affected and result
@param string $sql The SQL query
*/
function deleteQuery($sql) {
return new deleteQuery($sql);
}
/*
This function will automatically decide if data is being updated or inserted
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
/*
This function will perform an update query from the post data that has the correct form - fields matching table field names
@return object Object containing num rows affected and result
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
function autoUpdate($data, $table,$wheredata) {
//id is required, return false if not found
if (!isset($wheredata))
{
return false;
}
$sql = "
UPDATE
`$table`
SET
";
foreach ($data as $key => $value) {
$sql .= " `$key` = '$value' ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= " WHERE 0=0 ";
foreach ($wheredata as $key => $value) {
$sql .= " and `$key` = '$value' ";
}
return new updateQuery($sql);
}
/*
This function will perform an insert query from the matching form table
@return object Object containing num rows affected and result
@param array $data The post object, key/value pairs , already validated
@param string $table The table to be updated
*/
function autoInsert($data, $table, $validate = false)
{
$_fields = array();
$_values = array();
foreach ($data as $field => $value) {
$_fields[] = $field;
$_values[] = $value;
}
$sql = "
INSERT INTO
`$table`
(
";
foreach($_fields as $field) {
$sql .= "`$field` ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= "
) VALUES (
";
foreach($_values as $value) {
$sql .= "'$value' ,";
}
//remove extra comma
$sql = substr($sql, 0, (strlen($sql) - 1));
$sql .= "
)
";
return new insertQuery($sql);
}
/*
This function will perform an auto delete query from the matching form table
@return object Object containing num rows affected and result
@param int $id The related id
@param string $table The table to be affected
*/
function autoDelete($sql) {
return new deleteQuery($sql); }
}
class fetchQuery {
public $result;
public $num = 0;
public $rows = array();
public $error = false;
function fetchQuery($sql) {
$this->result = mysql_query($sql);
if ($this->result) {
$this->num = mysql_num_rows($this->result);
if ($this->num) {
while($row = mysql_fetch_assoc($this->result)) {
$this->rows[] = $row;
}
} else {
$this->result = false;
}
} else {
$this->result = false;
$this->error = mysql_error();
}
}
请给我一个使用connect函数创建fetch查询的解决方案。您可以创建一个类似于策略的基本函数来处理此类场景。因此，如果您单独包含函数文件，您的数据库将动态连接，您可以使用连接到数据库的变量来使用它 您可以有两个文件，然后可以像这样执行场景 db.php
<?php
class DB {
function __construct(){
$username='root';
$password='';
$host='localhost';
$db='store';
$this->connection = mysqli_connect($username,$password,$host,$db);
if(mysqli_connect_errno){
echo "Failed to connect to MYSQL: " . mysqli_connect_error();
}
}
function fetchData(){
$get_query = "SELECT * FROM TABLE"
$result = mysqli_query($this->connection, $get_query);
}
}
?>
<?php
include('db.php'); // Include the DB file over this line
$conn= new DB(); // Initialize the class that we have created
$conn->fetchData();// This query will select all the data and return it.
?>
<?php
class DB {
function __construct(){
$username='root';
$password='';
$host='localhost';
$db='store';
$this->connection = mysqli_connect($username,$password,$host,$db);
if(mysqli_connect_errno){
echo "Failed to connect to MYSQL: " . mysqli_connect_error();
}
}
function fetchData(){
$get_query = "SELECT * FROM TABLE"
$result = mysqli_query($this->connection, $get_query);
}
}
?>
<?php
include('db.php'); // Include the DB file over this line
$conn= new DB(); // Initialize the class that we have created
$conn->fetchData();// This query will select all the data and return it.
?>
快乐编码：）您可以创建一个基本的函数式策略来处理这种类型的场景。因此，如果您单独包含函数文件，您的数据库将动态连接，您可以使用连接到数据库的变量来使用它 您可以有两个文件，然后可以像这样执行场景 db.php
<?php
class DB {
function __construct(){
$username='root';
$password='';
$host='localhost';
$db='store';
$this->connection = mysqli_connect($username,$password,$host,$db);
if(mysqli_connect_errno){
echo "Failed to connect to MYSQL: " . mysqli_connect_error();
}
}
function fetchData(){
$get_query = "SELECT * FROM TABLE"
$result = mysqli_query($this->connection, $get_query);
}
}
?>
<?php
include('db.php'); // Include the DB file over this line
$conn= new DB(); // Initialize the class that we have created
$conn->fetchData();// This query will select all the data and return it.
?>
<?php
class DB {
function __construct(){
$username='root';
$password='';
$host='localhost';
$db='store';
$this->connection = mysqli_connect($username,$password,$host,$db);
if(mysqli_connect_errno){
echo "Failed to connect to MYSQL: " . mysqli_connect_error();
}
}
function fetchData(){
$get_query = "SELECT * FROM TABLE"
$result = mysqli_query($this->connection, $get_query);
}
}
?>
<?php
include('db.php'); // Include the DB file over this line
$conn= new DB(); // Initialize the class that we have created
$conn->fetchData();// This query will select all the data and return it.
?>
快乐编码：）制作一个如下所示的结构并尝试 数据库配置：dbconfig.php
<?php
$glob['dbhost'] = 'localhost';
$glob['dbusername'] = 'username';
$glob['dbpassword'] = 'password';
$glob['dbdatabase'] = 'database';
?>
<?php
class database {
var $_sql = '';
/** @var Internal variable to hold the connector resource */
var $_resource = '';
/** @var Internal variable to hold the query result*/
var $_result = '';
/**
* Database object constructor
* @param string Database host
* @param string Database user name
* @param string Database user password
* @param string Database name
*/
function database() {
global $glob;
$host = $glob['dbhost'];
$user = $glob['dbusername'];
$pass = $glob['dbpassword'];
$db = $glob['dbdatabase'];
$this->_resource = @mysqli_connect( $host, $user, $pass, $db );
if (mysqli_connect_errno()){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
else{
echo "Could not connect to the database!";
exit;
}
}
/**
* Execute the query
* @return mixed A database resource if successful, FALSE if not.
*/
function query($sql) {
$_sql = $sql;
return $_result = @mysqli_query($this->_resource, $_sql);
}
function fetchArray($result) {
return @mysqli_fetch_array($result);
}
function fetchAssoc($result) {
return @mysqli_fetch_assoc($result);
}
}
?>
<?php
session_start();
ob_start("ob_gzhandler");
@ob_gzhandler();
error_reporting(E_ERROR);
require_once('dbconfig.php');
require_once('database.class.php');
$dbclass = new database();
?>
<?php
require('configuration.php');
$sqltepm="SELECT * FROM tblname";
$restepm=$dbclass->query($sqltepm);
while($row=$dbclass->fetchArray($restepm)){
extract($row);
}
?>
制作一个如下所示的结构并尝试 数据库配置：dbconfig.php
<?php
$glob['dbhost'] = 'localhost';
$glob['dbusername'] = 'username';
$glob['dbpassword'] = 'password';
$glob['dbdatabase'] = 'database';
?>
<?php
class database {
var $_sql = '';
/** @var Internal variable to hold the connector resource */
var $_resource = '';
/** @var Internal variable to hold the query result*/
var $_result = '';
/**
* Database object constructor
* @param string Database host
* @param string Database user name
* @param string Database user password
* @param string Database name
*/
function database() {
global $glob;
$host = $glob['dbhost'];
$user = $glob['dbusername'];
$pass = $glob['dbpassword'];
$db = $glob['dbdatabase'];
$this->_resource = @mysqli_connect( $host, $user, $pass, $db );
if (mysqli_connect_errno()){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
else{
echo "Could not connect to the database!";
exit;
}
}
/**
* Execute the query
* @return mixed A database resource if successful, FALSE if not.
*/
function query($sql) {
$_sql = $sql;
return $_result = @mysqli_query($this->_resource, $_sql);
}
function fetchArray($result) {
return @mysqli_fetch_array($result);
}
function fetchAssoc($result) {
return @mysqli_fetch_assoc($result);
}
}
?>
<?php
session_start();
ob_start("ob_gzhandler");
@ob_gzhandler();
error_reporting(E_ERROR);
require_once('dbconfig.php');
require_once('database.class.php');
$dbclass = new database();
?>
<?php
require('configuration.php');
$sqltepm="SELECT * FROM tblname";
$restepm=$dbclass->query($sqltepm);
while($row=$dbclass->fetchArray($restepm)){
extract($row);
}
?>