mysqli_select_db(3) [php man page]

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)

MYSQLI_MULTI_QUERY(3)							 1						     MYSQLI_MULTI_QUERY(3)

mysqli::multi_query - Performs a query on the database

       Object oriented style

SYNOPSIS

       bool mysqli::multi_query (string  $query)

DESCRIPTION

       Procedural style
       bool mysqli_multi_query (mysqli	$link, string  $query)

	Executes one or multiple queries which are concatenated by a semicolon.

	To  retrieve  the  resultset from the first query you can use mysqli_use_result(3) or mysqli_store_result(3). All subsequent query results
       can be processed using mysqli_more_results(3) and mysqli_next_result(3).

PARAMETERS

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

	      o $query
		- The query, as a string.  Data inside the query should be properly escaped.

RETURN VALUES

	Returns FALSE if the first statement failed. To retrieve subsequent errors from other statements you have  to  call  mysqli_next_result(3)
       first.

EXAMPLES

       Example #1

	      mysqli::multi_query example

	      Object oriented style

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

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

	      $query  = "SELECT CURRENT_USER();";
	      $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

	      /* execute multi query */
	      if ($mysqli->multi_query($query)) {
		  do {
		      /* store first result set */
		      if ($result = $mysqli->store_result()) {
			  while ($row = $result->fetch_row()) {
			      printf("%s
", $row[0]);
			  }
			  $result->free();
		      }
		      /* print divider */
		      if ($mysqli->more_results()) {
			  printf("-----------------
");
		      }
		  } while ($mysqli->next_result());
	      }

	      /* close connection */
	      $mysqli->close();
	      ?>

	      Procedural style

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

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

	      $query  = "SELECT CURRENT_USER();";
	      $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

	      /* execute multi query */
	      if (mysqli_multi_query($link, $query)) {
		  do {
		      /* store first result set */
		      if ($result = mysqli_store_result($link)) {
			  while ($row = mysqli_fetch_row($result)) {
			      printf("%s
", $row[0]);
			  }
			  mysqli_free_result($result);
		      }
		      /* print divider */
		      if (mysqli_more_results($link)) {
			  printf("-----------------
");
		      }
		  } while (mysqli_next_result($link));
	      }

	      /* close connection */
	      mysqli_close($link);
	      ?>

	      The above examples will output something similar to:

	      my_user@localhost
	      -----------------
	      Amersfoort
	      Maastricht
	      Dordrecht
	      Leiden
	      Haarlemmermeer

SEE ALSO

       mysqli_query(3), mysqli_use_result(3), mysqli_store_result(3), mysqli_next_result(3), mysqli_more_results(3).

PHP Documentation Group 												     MYSQLI_MULTI_QUERY(3)