php man page for mysqli_select_db

MYSQLI_SELECT_DB(3)							 1						       MYSQLI_SELECT_DB(3)

mysqli::select_db - Selects the default database for database queries

       Object oriented style

SYNOPSIS
       bool mysqli::select_db (string  $dbname)

DESCRIPTION
       Procedural style
       bool mysqli_select_db (mysqli  $link, string  $dbname)

	Selects the default database to be used when performing queries against the database connection.

       Note

	       This  function  should only be used to change the default database for the connection. You can select the default database with 4th
	      parameter in mysqli_connect(3).

PARAMETERS
	      o $
		link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3)

	      o $dbname
		- The database name.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      mysqli::select_db example

	      Object oriented style

	      <?php
	      $mysqli = new mysqli("localhost", "my_user", "my_password", "test");

	      /* check connection */
	      if (mysqli_connect_errno()) {
		  printf("Connect failed: %s
", mysqli_connect_error());
		  exit();
	      }

	      /* return name of current default database */
	      if ($result = $mysqli->query("SELECT DATABASE()")) {
		  $row = $result->fetch_row();
		  printf("Default database is %s.
", $row[0]);
		  $result->close();
	      }

	      /* change db to world db */
	      $mysqli->select_db("world");

	      /* return name of current default database */
	      if ($result = $mysqli->query("SELECT DATABASE()")) {
		  $row = $result->fetch_row();
		  printf("Default database is %s.
", $row[0]);
		  $result->close();
	      }

	      $mysqli->close();
	      ?>

	      Procedural style

	      <?php
	      $link = mysqli_connect("localhost", "my_user", "my_password", "test");

	      /* check connection */
	      if (mysqli_connect_errno()) {
		  printf("Connect failed: %s
", mysqli_connect_error());
		  exit();
	      }

	      /* return name of current default database */
	      if ($result = mysqli_query($link, "SELECT DATABASE()")) {
		  $row = mysqli_fetch_row($result);
		  printf("Default database is %s.
", $row[0]);
		  mysqli_free_result($result);
	      }

	      /* change db to world db */
	      mysqli_select_db($link, "world");

	      /* return name of current default database */
	      if ($result = mysqli_query($link, "SELECT DATABASE()")) {
		  $row = mysqli_fetch_row($result);
		  printf("Default database is %s.
", $row[0]);
		  mysqli_free_result($result);
	      }

	      mysqli_close($link);
	      ?>

	      The above examples will output:

	      Default database is test.
	      Default database is world.

SEE ALSO
       mysqli_connect(3), mysqli_real_connect(3).

PHP Documentation Group 												       MYSQLI_SELECT_DB(3)