A database consists of one or more tables.
You will need special CREATE privileges to create or to delete a MySQL database.
Create a MySQL Database Using MySQLi and PDO
The CREATE DATABASE statement is used to create a database in MySQL.
The following examples create a database named "myDB":
Example (MySQLi Object-oriented)
<?php
$servername = "localhost";
$username = "username";
$password =
"password";
// Create connection
$conn =
new mysqli($servername, $username, $password);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// Create database
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
echo "Database created successfully";
} else {
echo
"Error creating database: " . $conn->error;
}
$conn->close();
?>
Note: When you create a new database, you must only specify
the first three arguments to the mysqli object (servername, username and
password).
Tip: If you have to use a specific port,
add an empty string for the database-name argument, like this: new mysqli("localhost",
"username", "password", "", port)
Example (MySQLi Procedural)
<?php
$servername = "localhost";
$username = "username";
$password =
"password";
// Create connection
$conn = mysqli_connect($servername,
$username, $password);
// Check connection
if (!$conn) {
die("Connection
failed: " . mysqli_connect_error());
}
// Create database
$sql = "CREATE
DATABASE myDB";
if (mysqli_query($conn, $sql)) {
echo "Database
created successfully";
} else {
echo "Error
creating database: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
Note: The following PDO example create a database named "myDBPDO":
Example (PDO)
<?php
$servername = "localhost";
$username = "username";
$password = "password";
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);
$sql = "CREATE DATABASE myDBPDO";
// use exec() because no
results are returned
$conn->exec($sql);
echo "Database created successfully<br>";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>
Tip: A great benefit of PDO is that it has exception class to handle any problems that may occur in our database queries. If an exception is thrown within the try{ } block, the script stops executing and flows directly to the first catch(){ } block. In the catch block above we echo the SQL statement and the generated error message.