PHP Create a MySQL Database

To create and delete a database you should have admin privilege. Its very easy to create a new MySQL database. PHP uses mysql_query function to create a MySQL database. This function takes two parameters and returns TRUE on success or FALSE on failure.You will need special CREATE privileges to create or to delete a MySQL database.

The CREATE DATABASE statement is used to create a database in MySQL.

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(); ?>

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); ?>

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; ?>

Selecting a Database

Once you establish a connection with a database server then it is required to select a particular database where your all the tables are associated. This is required because there may be multiple databases residing on a single server and you can do work with a single database at a time.

PHP provides function mysql_select_db to select a database.It returns TRUE on success or FALSE on failure.

Example -

<?php $dbhost = 'localhost:3036'; $dbuser = 'root'; $dbpass = 'rootpassword'; $conn = mysql_connect($dbhost, $dbuser, $dbpass); if(! $conn ) { die('Could not connect: ' . mysql_error()); } echo 'Connected successfully'; $sql = 'CREATE TABLE employee( '. 'emp_id INT NOT NULL AUTO_INCREMENT, '. 'emp_name VARCHAR(20) NOT NULL, '. 'emp_address VARCHAR(20) NOT NULL, '. 'emp_salary INT NOT NULL, '. 'join_date timestamp(14) NOT NULL, '. 'primary key ( emp_id ))'; mysql_select_db('test_db'); $retval = mysql_query( $sql, $conn ); if(! $retval ) { die('Could not create table: ' . mysql_error()); } echo "Table employee created successfully\n"; mysql_close($conn); ?>