The CREATE DATABASE statement is used to create a MySQL database. We must add the CREATE DATABASE statement to the mysql_query() function to execute the command. 

Ex: (Create database)

<?php  
	$host = "localhost";  
	$user = "";  
	$pass = "";  
	$conn = mysql_connect($host, $user, $pass);  
	if(!$conn )  
	{  
	  die("Could not connect:" . mysql_connect_error());  
	}  
	echo "Connected successfully<br/>";  
	  
	$sqlQuery = "CREATE Database mydatabase";  
	if(mysql_query( $conn,$sqlQuery)){  
		echo "Database mydb created successfully.";  
	}else{  
		echo "Sorry, database creation failed ".mysql_error($conn);  
	}  
	mysql_close($conn);  
?>  

Output:

Connected successfully

Database mydatabase created successfully.

In the above example first we create the connection with the database then we write statement to create a database of name mydatabase after that this statement is passed to mysql_query() along with the connection variable of the database.