The database has one or more tables.
You need CREATE permission to create or delete MySQL
database.
Creating a MySQL database using MySQLi and PDO
The CREATE DATABASE statement is used to create a database in MySQL.
In the following example, a database named "myDB" is created:
Instance (MySQLi - Object-oriented)
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// 创建连接
$conn =
new mysqli($servername, $username, $password);
// 检测连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 创建数据库
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
echo "数据库创建成功";
} else {
echo
"Error creating database: " . $conn->error;
}
$conn->close();
?> | ##Note: When you create a new database, you must specify three parameters for the mysqli object ( servername, username and
password).
Tip: If you use another port (default is 3306), add an empty string for the database parameter, such as: new mysqli("localhost",
"username", "password", "", port) |
|---|
Example (MySQLi Procedural)
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// 创建连接
$conn = mysqli_connect($servername,
$username, $password);
// 检测连接
if (!$conn) {
die("连接失败: " . mysqli_connect_error());
}
// 创建数据库
$sql = "CREATE
DATABASE myDB";
if (mysqli_query($conn, $sql)) {
echo "数据库创建成功";
} else {
echo "Error
creating database: " . mysqli_error($conn);
}
mysqli_close($conn);
?>Note: The following uses PDO instance to create database "myDBPDO":
Instance
Use PDO:
<?php
$servername = "localhost";
$username = "username";
$password = " password";
try {
$conn = new PDO( "mysql:host=$servername;dbname=myDB", $username, $password);
// Set PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE , PDO::ERRMODE_EXCEPTION);
$sql = "CREATE DATABASE myDBPDO";
// Use exec() because no result is returned
$ conn->exec($sql);
echo "Database created successfully<br>";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e-> ;getMessage();
}
$conn = null;
?>
## Tips: The biggest benefit of using PDO is to query in the database When there is a problem in the process, you can use the exception class to
solving issues. If an exception occurs in the try{ } code block, the script will stop execution and jump to the first catch(){ } code block to execute the code.
In the code block captured above we output the SQL statement and generate the error message.
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