PHP Velho Oeste 2024

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 */
/* 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")
)
change_user(string $user, string $password, string $database): bool
commit(int $flags = ?, string $name = ?): bool
debug(string $message): bool
mysqli_stmt::get_server_info(): string
kill(int $processid): bool
options(int $option, mixed $value): bool
public static poll(
    array &$read,
    array &$error,
    array &$reject,
    int $sec,
    int $usec = ?
): int
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
public refresh(int $options): bool
rollback(int $flags = ?, string $name = ?): bool
ssl_set(
    string $key,
    string $cert,
    string $ca,
    string $capath,
    string $cipher
): bool
}

Tabla de contenidos

add a note add a note

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));
    }

}

?>
To Top