APLIKACJE INTERNETOWE 8 PHP WYKORZYSTANIE BAZY DANYCH MYSQL

Transcription

1 APLIKACJE INTERNETOWE 8 PHP WYKORZYSTANIE BAZY DANYCH MYSQL

2 PLAN PREZENTACJI Bazy danych w PHP Połączenie z bazą danych Zamknięcie połączenie Tworzenie bazy danych Tworzenie tabeli Operacje na tabelach Wstawianie nowego rekordu Kasowanie rekordu Aktualizacja rekordu Wyświetlanie rekordów

3 PODŁĄCZENIE DO BAZY DANYCH $servername = "localhost"; $username = "username"; $password = "password"; MySQLi Object-Oriented // Create connection $conn = new mysqli($servername, $username, $password); // Check connection if ($conn->connect_error) { die("connection failed: ". $conn->connect_error); echo "Connected successfully";

4 PODŁĄCZENIE DO BAZY DANYCH MySQLi Procedural // Create connection $conn = mysqli_connect($servername, $username, $password); // Check connection if (!$conn) { die("connection failed: ". mysqli_connect_error()); echo "Connected successfully";

5 PODŁĄCZENIE DO BAZY DANYCH PDO - PHP Data Objects try { $conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password); // set the PDO error mode to exception $conn->setattribute(pdo::attr_errmode, PDO::ERRMODE_EXCEPTION); echo "Connected successfully"; catch(pdoexception $e) { echo "Connection failed: ". $e->getmessage();

6 ZAMKNIĘCIE POŁĄCZENIA DO BAZY DANYCH MySQLi Object-Oriented $conn->close(); MySQLi Procedural mysqli_close($conn); PDO - PHP Data Objects $conn = null;

7 TWORZENIE BAZY DANYCH MySQLi Object-Oriented $sql = "CREATE DATABASE mydb"; if ($conn->query($sql) === TRUE) { echo "Database created successfully"; else { echo "Error creating database: ". $conn->error;

8 TWORZENIE BAZY DANYCH MySQLi Procedural $sql = "CREATE DATABASE mydb"; if (mysqli_query($conn, $sql)) { echo "Database created successfully"; else { echo "Error creating database: ". mysqli_error($conn);

9 TWORZENIE BAZY DANYCH PDO - PHP Data Objects try { $conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password); $conn->setattribute(pdo::attr_errmode, PDO::ERRMODE_EXCEPTION); $sql = "CREATE DATABASE mydbpdo"; $conn->exec($sql); echo "Database created successfully<br>"; catch(pdoexception $e) { echo $sql. "<br>". $e->getmessage();

10 TWORZENIE TABELI MySQL CREATE TABLE MyGuests ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, VARCHAR(50), reg_date TIMESTAMP )

11 TWORZENIE TABELI MySQLi Object-Oriented $sql = "CREATE TABLE MyGuests ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, VARCHAR(50), reg_date TIMESTAMP )"; if ($conn->query($sql) === TRUE) { echo "Table MyGuests created successfully"; else { echo "Error creating table: ". $conn->error;

12 TWORZENIE TABELI MySQLi Procedural $sql = "CREATE TABLE MyGuests ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, VARCHAR(50), reg_date TIMESTAMP )"; if (mysqli_query($conn, $sql)) { echo "Table MyGuests created successfully"; else { echo "Error creating table: ". mysqli_error($conn);

13 TWORZENIE TABELI PDO - PHP Data Objects $sql = "CREATE TABLE MyGuests ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, VARCHAR(50), reg_date TIMESTAMP )"; // use exec() because no results are returned $conn->exec($sql); echo "Table MyGuests created successfully";

14 DODANIE REKORDU DO TABELI MySQL INSERT INTO table_name (column1, column2, column3,...) VALUES (value1, value2, value3,...)

15 DODANIE REKORDU DO TABELI MySQLi Object-Oriented $dbname = "mydb"; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die("connection failed: ". $conn->connect_error); $sql = "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com')";

16 DODANIE REKORDU DO TABELI MySQLi Procedural $dbname = "mydb"; // Create connection $conn = mysqli_connect($servername, $username, $password, $dbname); // Check connection if (!$conn) { die("connection failed: ". mysqli_connect_error()); $sql = "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com')";

17 DODANIE REKORDU DO TABELI PDO - PHP Data Objects $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password); // set the PDO error mode to exception $conn->setattribute(pdo::attr_errmode, PDO::ERRMODE_EXCEPTION); $sql = "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com')"; // use exec() because no results are returned $conn->exec($sql); echo "New record created successfully";

18 DODANIE WIELU REKORDÓW DO TABELI MySQLi Object-Oriented $sql = "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com');"; $sql.= "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('Mary', 'Moe', 'mary@example.com');"; $sql.= "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('Julie', 'Dooley', 'julie@example.com')"; if ($conn->multi_query($sql) === TRUE) { echo "New records created successfully"; else { echo "Error: ". $sql. "<br>". $conn->error;

19 DODANIE WIELU REKORDÓW DO TABELI MySQLi Procedural $sql = "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com');"; $sql.= "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('Mary', 'Moe', 'mary@example.com');"; $sql.= "INSERT INTO MyGuests (firstname, lastname, ) VALUES ('Julie', 'Dooley', 'julie@example.com')"; if (mysqli_multi_query($conn, $sql)) { echo "New records created successfully"; else { echo "Error: ". $sql. "<br>". mysqli_error($conn);

20 DODANIE WIELU REKORDÓW DO TABELI PDO - PHP Data Objects try {... $conn->begintransaction(); $conn->exec("insert INTO MyGuests (firstname, lastname, ) VALUES ('John', 'Doe', 'john@example.com')"); $conn->exec("insert INTO MyGuests (firstname, lastname, ) VALUES ('Mary', 'Moe', 'mary@example.com')"); $conn->exec("insert INTO MyGuests (firstname, lastname, ) VALUES ('Julie', 'Dooley', 'julie@example.com')"); $conn->commit(); // commit the transaction echo "New records created successfully"; catch(pdoexception $e) { $conn->rollback(); echo "Error: ". $e->getmessage();

21 WYŚWIETLANIE ELEMENTÓW TABLICY MySQL Wyświetlane danych z danej kolumny SELECT column_name(s) FROM table_name Wyświetlanie wszystkich danych SELECT * FROM table_name

22 WYŚWIETLANIE ELEMENTÓW TABLICY MySQLi Object-Oriented $sql = "SELECT id, firstname, lastname FROM MyGuests"; $result = $conn->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { else { echo "id: ". $row["id"]. " - Name: ". $row["firstname"]. " ". $row["lastname"]. "<br>"; echo "0 results";

23 WYŚWIETLANIE ELEMENTÓW TABLICY MySQLi Procedural $sql = "SELECT id, firstname, lastname FROM MyGuests"; $result = mysqli_query($conn, $sql); if (mysqli_num_rows($result) > 0) { while($row = mysqli_fetch_assoc($result)) { else { echo "id: ". $row["id"]. " - Name: ". $row["firstname"]. " ". $row["lastname"]. "<br>"; echo "0 results";

24 WYŚWIETLANIE ELEMENTÓW TABLICY PDO - PHP Data Objects $sql = "SELECT id, firstname, lastname FROM MyGuests"; $result = $conn->query($sql); if ($result->num_rows > 0) { echo "<table><tr><th>id</th><th>name</th></tr>"; while($row = $result->fetch_assoc()) { echo "<tr><td>".$row["id"]."</td><td>". $row["firstname"]." ".$row["lastname"]."</td></tr>"; echo "</table>"; else { echo "0 results";

25 KASOWANIE REKORDÓW Z TABELI MySQL DELETE FROM table_name WHERE some_column = some_value

26 KASOWANIE REKORDÓW Z TABELI MySQLi Object-Oriented $sql = "DELETE FROM MyGuests WHERE id=3"; if ($conn->query($sql) === TRUE) { echo "Record deleted successfully"; else { echo "Error deleting record: ". $conn->error;

27 KASOWANIE REKORDÓW Z TABELI MySQLi Procedural $sql = "DELETE FROM MyGuests WHERE id=3"; if (mysqli_query($conn, $sql)) { echo "Record deleted successfully"; else { echo "Error deleting record: ". mysqli_error($conn);

28 KASOWANIE REKORDÓW Z TABELI PDO - PHP Data Objects $sql = "DELETE FROM MyGuests WHERE id=3"; // use exec() because no results are returned $conn->exec($sql); echo "Record deleted successfully";

29 AKTUALIZACJA REKORDU TABELI MySQL UPDATE table_name SET column1=value, column2=value2,... WHERE some_column=some_value

30 AKTUALIZACJA REKORDU TABELI MySQLi Object-Oriented $sql = "UPDATE MyGuests SET lastname='doe' WHERE id=2"; if ($conn->query($sql) === TRUE) { echo "Record updated successfully"; else { echo "Error updating record: ". $conn->error;

31 AKTUALIZACJA REKORDU TABELI MySQLi Procedural $sql = "UPDATE MyGuests SET lastname='doe' WHERE id=2"; if (mysqli_query($conn, $sql)) { echo "Record updated successfully"; else { echo "Error updating record: ". mysqli_error($conn);

32 AKTUALIZACJA REKORDU TABELI PDO - PHP Data Objects $sql = "UPDATE MyGuests SET lastname='doe' WHERE id=2"; $stmt = $conn->prepare($sql); $stmt->execute(); echo $stmt->rowcount(). " records UPDATED successfully";