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A classe MySQLi

Introdução

Representa uma conexão entre o PHP e um banco de dados MySQL.

Sinopse da classe

MySQLi {

/* Propriedades */

int $affected_rows;

int $errno;

array $mysqli->error_list;

string $error;

string $host_info;

string $protocol_version;

string $server_info;

int $server_version;

string $info;

int $insert_id;

string $mysqli->sqlstate;

int $mysqli->thread_id;

int $mysqli->warning_count;

/* Métodos */

mysqli_affected_rows ( mysqli $link ) : int

mysqli::autocommit ( bool $mode ) : bool

public mysqli::begin_transaction ([ int $flags = 0 [, string $name ]] ) : bool

mysqli::change_user ( string $user , string $password , string $database ) : bool

mysqli::character_set_name ( void ) : string

mysqli::commit ( void ) : bool

mysqli::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

mysqli::dump_debug_info ( void ) : bool

mysqli_errno ( mysqli $link ) : int

mysqli_error_list ( mysqli $link ) : array

mysqli_error ( mysqli $link ) : string

mysqli::get_charset ( void ) : object

mysqli::get_client_info ( void ) : string

mysqli::get_client_version ( void ) : int

mysqli::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

mysqli::get_warnings ( void ) : mysqli_warning

mysqli_info ( mysqli $link ) : string

mysqli_init ( void ) : mysqli

mysqli_insert_id ( mysqli $link ) : int

mysqli::kill ( int $processid ) : bool

mysqli::more_results ( void ) : bool

mysqli::multi_query ( string $query ) : bool

mysqli::next_result ( void ) : bool

mysqli::options ( int $option , mixed $value ) : bool

mysqli::ping ( void ) : bool

public static mysqli::poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec = 0 ] ) : int

mysqli::prepare ( string $query ) : mysqli_stmt

mysqli::query ( string $query [, int $resultmode = MYSQLI_STORE_RESULT ] ) : mixed

mysqli::real_connect ([ string $host [, string $username [, string $passwd [, string $dbname [, int $port [, string $socket [, int $flags ]]]]]]] ) : bool

mysqli::escape_string ( string $escapestr ) : string

mysqli::real_query ( string $query ) : bool

public mysqli::reap_async_query ( void ) : mysqli_result

public mysqli::refresh ( int $options ) : bool

public mysqli::release_savepoint ( string $name ) : bool

mysqli::rollback ([ int $flags = 0 [, string $name ]] ) : bool

mysqli::rpl_query_type ( string $query ) : int

public mysqli::savepoint ( string $name ) : bool

mysqli::select_db ( string $dbname ) : bool

mysqli::send_query ( string $query ) : bool

mysqli::set_charset ( string $charset ) : bool

mysqli_set_local_infile_default ( mysqli $link ) : void

mysqli::set_local_infile_handler ( mysqli $link , callable $read_func ) : bool

mysqli_sqlstate ( mysqli $link ) : string

mysqli::ssl_set ( string $key , string $cert , string $ca , string $capath , string $cipher ) : bool

mysqli::stat ( void ) : string

mysqli::stmt_init ( void ) : mysqli_stmt

mysqli::store_result ([ int $option ] ) : mysqli_result

mysqli_thread_id ( mysqli $link ) : int

mysqli_thread_safe ( void ) : bool

mysqli::use_result ( void ) : mysqli_result

mysqli_warning_count ( mysqli $link ) : int

}

Índice

mysqli->affected_rows — Retorna o número de linhas afetadas pela operação MySQL anterior
mysqli::autocommit — Ativa ou desativa o salvar automaticamente as modificações no banco de dados
mysqli::begin_transaction — Starts a transaction
mysqli::change_user — Modifica o usuário para a conexão com o banco de dados especificada
mysqli::character_set_name — Retorna o conjunto de caracteres padrão para a conexão com o banco de dados
mysqli_close — Fecha uma conexão aberta anteriormente com o banco de dados
mysqli::commit — Salva a transação atual
mysqli_connect_errno — Retorna o código de erro da ultima chamada a função connect
mysqli_connect_error — Retorna uma string descrevendo o ultimo erro da função connect
mysqli::__construct — Open a new connection to the MySQL server
mysqli_debug — Realiza operações de debug
mysqli::dump_debug_info — Descarrega informação de debug no log
mysqli->errno — Retorna o código de erro para a chamada de função mais recente
mysqli::$error_list — Returns a list of errors from the last command executed
mysqli->error — Retorna uma string descrevendo o ultimo erro
mysqli_field_count — Retorna o número de colunas para a consulta mais recente
mysqli::get_charset — Returns a character set object
mysqli::get_client_info — Retorna a versão do cliente MySQL como uma string
mysqli::get_client_version — Obtém informação sobre o cliente MySQL
mysqli::get_connection_stats — Returns statistics about the client connection
mysqli_get_host_info — Retorna uma string representando o tipo da conexão usada
mysqli->protocol_version — Retorna a versão do protocolo MySQL usada
mysqli->server_info — Retorna a versão do servidor MySQL
mysqli->server_version — Retorna a versão do servidor MySQL como um integer
mysqli::get_warnings — Get result of SHOW WARNINGS
mysqli_info — Recupera informação sobre a mais recente query executada
mysqli_init — Inicializa a MySQLi e retorna um resource para usar com mysqli_real_connect()
mysqli_insert_id — Retorna o id gerado automaticamente na última consulta
mysqli::kill — Solicita ao servidor o encerramento de um thread do MySQL
mysqli::more_results — Verifica se há mais algum resultado de uma multi query
mysqli::multi_query — Performs a query on the database
mysqli::next_result — Prepara o próximo resultado de multi_query
mysqli::options — Set options
mysqli::ping — Pings a server connection, or tries to reconnect if the connection has gone down
mysqli::poll — Poll connections
mysqli::prepare — Prepare an SQL statement for execution
mysqli::query — Performs a query on the database
mysqli::real_connect — Opens a connection to a mysql server
mysqli::real_escape_string — Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the connection
mysqli::real_query — Execute an SQL query
mysqli::reap_async_query — Get result from async query
mysqli::refresh — Refreshes
mysqli::release_savepoint — Removes the named savepoint from the set of savepoints of the current transaction
mysqli::rollback — Rolls back current transaction
mysqli::rpl_query_type — Returns RPL query type
mysqli::savepoint — Set a named transaction savepoint
mysqli::select_db — Selects the default database for database queries
mysqli::send_query — Send the query and return
mysqli::set_charset — Sets the default client character set
mysqli::set_local_infile_default — Unsets user defined handler for load local infile command
mysqli::set_local_infile_handler — Set callback function for LOAD DATA LOCAL INFILE command
mysqli::$sqlstate — Returns the SQLSTATE error from previous MySQL operation
mysqli::ssl_set — Used for establishing secure connections using SSL
mysqli::stat — Gets the current system status
mysqli::stmt_init — Initializes a statement and returns an object for use with mysqli_stmt_prepare
mysqli::store_result — Transfers a result set from the last query
mysqli::$thread_id — Returns the thread ID for the current connection
mysqli::thread_safe — Returns whether thread safety is given or not
mysqli::use_result — Initiate a result set retrieval
mysqli::$warning_count — Returns the number of warnings from the last query for the given link

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User Contributed Notes 2 notes

down

user at note dot com ¶

1 month ago


<?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;
    }

}

?>

down

user at note dot com ¶

1 month ago


<?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));
    }

}

?>

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