PHP Create a MySQL Database

🗄️ PHP Create a MySQL Database Tutorial

PHP can be used to create a MySQL database dynamically using the mysqli or PDO extension. This is useful when setting up applications programmatically.

1️⃣ Using `mysqli` (Procedural)

<?php
$servername = "localhost";
$username = "root";
$password = "";

// Create connection
$conn = mysqli_connect($servername, $username, $password);

// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}

// Create database
$sql = "CREATE DATABASE test_db";
if (mysqli_query($conn, $sql)) {
echo "Database created successfully";
} else {
echo "Error creating database: " . mysqli_error($conn);
}

// Close connection
mysqli_close($conn);
?>

<?php

$servername = "localhost";

$username = "root";

$password = "";

// Create connection

$conn = mysqli_connect($servername, $username, $password);

// Check connection

if (!$conn) {

die("Connection failed: " . mysqli_connect_error());

}

// Create database

$sql = "CREATE DATABASE test_db";

if (mysqli_query($conn, $sql)) {

echo "Database created successfully";

} else {

echo "Error creating database: " . mysqli_error($conn);

}

// Close connection

mysqli_close($conn);

Explanation:

Connect to MySQL without specifying a database.
Use CREATE DATABASE dbname SQL query.
Check for success or failure with mysqli_query().

2️⃣ Using `mysqli` (Object-Oriented)

<?php
$conn = new mysqli("localhost", "root", "");

// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}

// Create database
$sql = "CREATE DATABASE test_db";
if ($conn->query($sql) === TRUE) {
echo "Database created successfully";
} else {
echo "Error creating database: " . $conn->error;
}

// Close connection
$conn->close();
?>

<?php

$conn = new mysqli("localhost", "root", "");

// Check connection

if ($conn->connect_error) {

die("Connection failed: " . $conn->connect_error);

}

// Create database

$sql = "CREATE DATABASE test_db";

if ($conn->query($sql) === TRUE) {

echo "Database created successfully";

} else {

echo "Error creating database: " . $conn->error;

}

// Close connection

$conn->close();

✅ $conn->query($sql) executes the SQL statement.

3️⃣ Using PDO

<?php
try {
$conn = new PDO("mysql:host=localhost", "root", "");
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$sql = "CREATE DATABASE test_db";
$conn->exec($sql);

echo "Database created successfully";
} catch(PDOException $e) {
echo "Error creating database: " . $e->getMessage();
}
?>

<?php

try {

$conn = new PDO("mysql:host=localhost", "root", "");

$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$sql = "CREATE DATABASE test_db";

$conn->exec($sql);

echo "Database created successfully";

} catch(PDOException $e) {

echo "Error creating database: " . $e->getMessage();

}

✅ PDO::exec() executes SQL statements that don’t return data (like CREATE, UPDATE, DELETE).

4️⃣ Key Points

You don’t specify a database in the connection when creating one.
Use mysqli_query() or PDO::exec() to execute SQL.
Always check for errors to ensure the database is created.
After creation, you can connect to the new database to create tables.

PHP Create a MySQL Database