MySQLi类

(PHP 5, PHP 7)

简介

代表PHP和Mysql数据库之间的一个连接。

类摘要

mysqli {
/* 属性 */
int $affected_rows;
int $connect_errno;
string $connect_error;
int $errno;
array $error_list;
string $error;
int $field_count;
string $client_info;
int $client_version;
string $host_info;
string $protocol_version;
string $server_info;
int $server_version;
string $info;
mixed $insert_id;
string $sqlstate;
int $thread_id;
int $warning_count;
/* 方法 */
mysqli_affected_rows ( mysqli $link ) : int
autocommit ( bool $mode ) : bool
public begin_transaction ([ int $flags = 0 [, string $name ]] ) : bool
change_user ( string $user , string $password , string $database ) : bool
character_set_name ( void ) : string
close ( void ) : bool
commit ( void ) : bool
mysqli_connect_errno ( void ) : int
mysqli_connect_error ( void ) : string
connect ([ string $host = ini_get("mysqli.default_host") [, string $username = ini_get("mysqli.default_user") [, string $passwd = ini_get("mysqli.default_pw") [, string $dbname = "" [, int $port = ini_get("mysqli.default_port") [, string $socket = ini_get("mysqli.default_socket") ]]]]]] ) : void
debug ( string $message ) : bool
dump_debug_info ( void ) : bool
mysqli_errno ( mysqli $link ) : int
mysqli_error_list ( mysqli $link ) : array
mysqli_error ( mysqli $link ) : string
mysqli_field_count ( mysqli $link ) : int
get_charset ( void ) : object
get_client_info ( void ) : string
mysqli_get_client_version ( mysqli $link ) : int
get_connection_stats ( void ) : bool
mysqli_get_host_info ( mysqli $link ) : string
mysqli_get_proto_info ( mysqli $link ) : int
mysqli_get_server_info ( mysqli $link ) : string
mysqli_get_server_version ( mysqli $link ) : int
get_warnings ( void ) : mysqli_warning
mysqli_info ( mysqli $link ) : string
init ( void ) : mysqli
mysqli_insert_id ( mysqli $link ) : mixed
kill ( int $processid ) : bool
more_results ( void ) : bool
multi_query ( string $query ) : bool
next_result ( void ) : bool
options ( int $option , mixed $value ) : bool
ping ( void ) : bool
public static poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec = 0 ] ) : int
prepare ( string $query ) : mysqli_stmt
query ( string $query [, int $resultmode = MYSQLI_STORE_RESULT ] ) : mixed
real_connect ([ string $host [, string $username [, string $passwd [, string $dbname [, int $port [, string $socket [, int $flags ]]]]]]] ) : bool
escape_string ( string $escapestr ) : string
real_query ( string $query ) : bool
public reap_async_query ( void ) : mysqli_result
public refresh ( int $options ) : bool
public release_savepoint ( string $name ) : bool
rollback ( void ) : bool
rpl_query_type ( string $query ) : int
public savepoint ( string $name ) : bool
select_db ( string $dbname ) : bool
send_query ( string $query ) : bool
set_charset ( string $charset ) : bool
mysqli_set_local_infile_default ( mysqli $link ) : void
set_local_infile_handler ( mysqli $link , callable $read_func ) : bool
mysqli_sqlstate ( mysqli $link ) : string
ssl_set ( string $key , string $cert , string $ca , string $capath , string $cipher ) : bool
stat ( void ) : string
stmt_init ( void ) : mysqli_stmt
store_result ([ int $option ] ) : mysqli_result
mysqli_thread_id ( mysqli $link ) : int
mysqli_thread_safe ( void ) : bool
use_result ( void ) : mysqli_result
mysqli_warning_count ( mysqli $link ) : int
}

Table of Contents

User Contributed Notes

user at note dot com 24-Jan-2020 05:14
<?php

class Database{

    protected $url;
    protected $user;
    protected $password;
    protected $db;
    protected $connection = null;

    public function __construct($url, $user, $password, $db)
    {
        $this->url = $url;
        $this->user = $user;
        $this->password = $password;
        $this->db = $db;
    }
    public function __destruct()
    {
        if($this->connection != null){
            $this->closeConnection();
        }
    }
    protected function makeConnection(){

        $this->connection = new mysqli($this->url, $this->user, $this->password, $this->db);
        if($this->connection->connect_error){
            echo "Fail" . $this->connection->connect_error;
        }
    }
    protected function closeConnection(){
        if($this->connection != null){
            $this->connection->close();
            $this->connection = null;
        }
    }
    public function executeQuery($query, $params = null){
        // Is there a DB connection?
        $this->makeConnection();
        // Adjust query with params if available
        if($params != null){
            // Change ? to values from parameter array
            $queryParts = preg_split("/\?/", $query);
            // if amount of ? is not equal to amount of values => error
            if(count($queryParts) != count($params) + 1){
                return false;
            }
            // Add first part
            $finalQuery = $queryParts[0];
            // Loop over all parameters
            for($i = 0; $i < count($params); $i++){
                // Add clean parameter to query
                $finalQuery = $finalQuery . $this->cleanParameters($params[$i]) . $queryParts[$i + 1];
            }
            $query = $finalQuery;
        }
        // Check for SQL injection

        $result = $this->connection->query($query);
        return $result;
    }
    protected function cleanParameters($parameters){
        // prevent SQL injection
        $result = $this->connection->real_escape_string($parameters);
        return $result;
    }
}

?>
<?php
include_once("Database.php");

class DatabaseFactory{
    // Singleton
    private static $connection;

    public static function getDatabase(){
        if(self::$connection == null){
            $url = "dt5.ehb.be";
            $user = "1920WEBINT038";
            $passw = "94617528";
            $db = "1920WEBINT038";
            self::$connection = new Database($url, $user, $passw, $db);
        }
        return self::$connection;
    }
}

?>
<?php

class Book{
    public $bookId;
    public $title;
    public $releasedate;
    public $priceExclVAT;
    public $emailPublisher;

    public function __construct($bookId, $title, $releasedate, $priceExclVAT, $emailPublisher)
    {
        $this->bookId = $bookId;
        $this->title = $title;
        $this->releasedate = $releasedate;
        $this->priceExclVAT = $priceExclVAT;
        $this->emailPublisher = $emailPublisher;
    }

}

?>
user at note dot com 24-Jan-2020 05:14
<?php

include_once("data/Book.php");
include_once("DatabaseFactory.php");
// CRUD methods for book objects
class BookDB{

    private static function getConnection(){
        return DatabaseFactory::getDatabase();
    }

    public static function getAll(){
        $query = "SELECT * FROM Book";
        // Execute query
        $conn = self::getConnection();
        $results = $conn->executeQuery($query);

        $resultsArray = array();

        for($i = 0; $i < $results->num_rows; $i++){
            $row = $results->fetch_array(); // Retrieves the current selected row

            // Make a book
            $book = self::convertRowToObject($row);

            // Add book to resultsArray
            $resultsArray[$i] = $book;
        }
        return $resultsArray;
    }

    public static function convertRowToObject($row){
        return new Book(
            $row["BookId"],
            $row["Title"],
            $row["Releasedate"],
            $row["Price"],
            $row["EmailPublisher"]
        );
    }

    public static function insert($book){
        return self::getConnection()->executeQuery("INSERT INTO Book(Title, Releasedate, Price, EmailPublisher) VALUES ('?', '?', '?', '?')", array($book->title, $book->releasedate, $book->priceExclVAT, $book->emailPublisher));
    }

}

?>