MySQLi - Select DB

Syntax

bool mysqli_select_db ( mysqli $link , string $dbname )

Definition and Usage

It is used to selects the default database for database queries.

Example

Try out following example −

<?php
   $servername = "localhost:3306";
   $username = "root";
   $password = "";
   $dbname = "TUTORIALS";
   $tmp = NULL;
   $conn = new mysqli($servername, $username, $password, $dbname);

   if (!$conn->real_connect($servername, $username, $password, $dbname)) {
      die('Connect Error (' . mysqli_connect_errno() . ') '. mysqli_connect_error());
   }
   echo 'Success... ' . mysqli_get_host_info($conn) . "\n";

   if ($result = $conn->query("SELECT DATABASE()")) {
      $row = $result->fetch_row();
      printf("Default database is %s.\n", $row[0]);
      $result->close();
   }
   $conn->select_db("test");

   if ($result = $conn->query("SELECT DATABASE()")) {
      $row = $result->fetch_row();
      printf("Default database is %s.\n", $row[0]);
      $result->close();
   }
   $conn->close();
?>

The sample output of the above code should be like this −

Success... localhost:3306 via TCP/IP Default database is tutorials.
Default database is test.