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    La clase mysqli

    (PHP 5, PHP 7, PHP 8)

    Introducción

    Representa una conexión entre PHP y una base de datos MySQL.

    Sinopsis de la Clase

    class mysqli {
    /* Propiedades */
    int $affected_rows;
    int $connect_errno;
    string $connect_error;
    int $errno;
    array $error_list;
    string $error;
    int $field_count;
    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;
    /* Métodos */
    __construct(
        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")
    )
    autocommit(bool $mode): bool
    change_user(string $user, string $password, string $database): bool
    character_set_name(): string
    close(): bool
    commit(int $flags = ?, string $name = ?): bool
    debug(string $message): bool
    dump_debug_info(): bool
    get_charset(): object
    get_client_info(): string
    get_connection_stats(): bool
    mysqli_stmt::get_server_info(): string
    get_warnings(): mysqli_warning
    init(): mysqli
    kill(int $processid): bool
    more_results(): bool
    multi_query(string $query): bool
    next_result(): bool
    options(int $option, mixed $value): bool
    ping(): bool
    public static poll(
        array &$read,
        array &$error,
        array &$reject,
        int $sec,
        int $usec = ?
    ): 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(): mysqli_result
    public refresh(int $options): bool
    rollback(int $flags = ?, string $name = ?): bool
    select_db(string $dbname): bool
    set_charset(string $charset): bool
    ssl_set(
        string $key,
        string $cert,
        string $ca,
        string $capath,
        string $cipher
    ): bool
    stat(): string
    stmt_init(): mysqli_stmt
    store_result(int $option = ?): mysqli_result
    use_result(): mysqli_result
    }

    Tabla de contenidos

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    User Contributed Notes 2 notes

    up
    1
    user at note dot com
    4 years 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;
        }

    }

    ?>
    up
    -8
    user at note dot com
    4 years 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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