<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$TOC_DEPRECATED = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/set.mysqlinfo.inc";
$setup = array (
  'home' => 
  array (
    0 => 'index.php',
    1 => 'PHP Manual',
  ),
  'head' => 
  array (
    0 => 'UTF-8',
    1 => 'it',
  ),
  'this' => 
  array (
    0 => 'book.mysqli.php',
    1 => 'MySQLi',
    2 => 'MySQL Improved Extension',
  ),
  'up' => 
  array (
    0 => 'set.mysqlinfo.php',
    1 => 'MySQL',
  ),
  'prev' => 
  array (
    0 => 'mysqlinfo.concepts.charset.php',
    1 => 'Character sets',
  ),
  'next' => 
  array (
    0 => 'mysqli.overview.php',
    1 => 'Overview',
  ),
  'alternatives' => 
  array (
  ),
  'source' => 
  array (
    'lang' => 'en',
    'path' => 'reference/mysqli/book.xml',
  ),
  'history' => 
  array (
  ),
  'extra_header_links' => 
  array (
    'rel' => 'alternate',
    'href' => '/manual/en/feeds/book.mysqli.atom',
    'type' => 'application/atom+xml',
  ),
);
$setup["toc"] = $TOC;
$setup["toc_deprecated"] = $TOC_DEPRECATED;
$setup["parents"] = $PARENTS;
manual_setup($setup);

contributors($setup);

?>
<div id="book.mysqli" class="book">
 

 <h1 class="title">MySQL Improved Extension</h1>

 



 <div id="intro.mysqli" class="preface">
  <h1 class="title">Introduzione</h1>
  <p class="para">
   The <code class="literal">mysqli</code> extension allows you to access the
   functionality provided by MySQL 4.1 and above. More information about
   the MySQL Database server can be found at
   <a href="http://www.mysql.com/" class="link external">&raquo;&nbsp;http://www.mysql.com/</a>
  </p>

  <p class="para">
   An overview of software available for using MySQL from PHP can be found
   at <a href="mysqli.overview.php" class="xref">Overview</a>
  </p>

  <p class="para">
   Documentation for MySQL can be found at
   <a href="http://dev.mysql.com/doc/" class="link external">&raquo;&nbsp;http://dev.mysql.com/doc/</a>.
  </p>

  <p class="para">
   Parts of this documentation included from MySQL manual with
   permissions of Oracle Corporation.
  </p>
  
  <p class="para">
   Examples use either the <a href="http://dev.mysql.com/doc/world-setup/en/index.html" class="link external">&raquo;&nbsp;world</a>
   or <a href="http://dev.mysql.com/doc/sakila/en/index.html" class="link external">&raquo;&nbsp;sakila</a> database, which are
   freely available.
  </p>

 </div>



 



 



 







 




 




 






 





 




 




 




 




 




 




 










<ul class="chunklist chunklist_book"><li><a href="mysqli.overview.php">Overview</a></li><li><a href="mysqli.quickstart.php">Quick start guide</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli.quickstart.dual-interface.php">Dual procedural and object-oriented interface</a></li><li><a href="mysqli.quickstart.connections.php">Connections</a></li><li><a href="mysqli.quickstart.statements.php">Executing statements</a></li><li><a href="mysqli.quickstart.prepared-statements.php">Prepared Statements</a></li><li><a href="mysqli.quickstart.stored-procedures.php">Stored Procedures</a></li><li><a href="mysqli.quickstart.multiple-statement.php">Multiple Statements</a></li><li><a href="mysqli.quickstart.transactions.php">API support for transactions</a></li><li><a href="mysqli.quickstart.metadata.php">Metadata</a></li></ul></li><li><a href="mysqli.setup.php">Installazione/Configurazione</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli.requirements.php">Requisiti</a></li><li><a href="mysqli.installation.php">Installazione</a></li><li><a href="mysqli.configuration.php">Configurazione di Runtime</a></li></ul></li><li><a href="mysqli.persistconns.php">The mysqli Extension and Persistent Connections</a></li><li><a href="mysqli.constants.php">Costanti predefinite</a></li><li><a href="mysqli.notes.php">Notes</a></li><li><a href="mysqli.summary.php">The MySQLi Extension Function Summary</a></li><li><a href="class.mysqli.php">mysqli</a> — The mysqli class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli.affected-rows.php">mysqli::$affected_rows</a> — Gets the number of affected rows in a previous MySQL operation</li><li><a href="mysqli.autocommit.php">mysqli::autocommit</a> — Turns on or off auto-committing database modifications</li><li><a href="mysqli.begin-transaction.php">mysqli::begin_transaction</a> — Starts a transaction</li><li><a href="mysqli.change-user.php">mysqli::change_user</a> — Changes the user of the database connection</li><li><a href="mysqli.character-set-name.php">mysqli::character_set_name</a> — Returns the current character set of the database connection</li><li><a href="mysqli.close.php">mysqli::close</a> — Closes a previously opened database connection</li><li><a href="mysqli.commit.php">mysqli::commit</a> — Commits the current transaction</li><li><a href="mysqli.connect-errno.php">mysqli::$connect_errno</a> — Returns the error code from last connect call</li><li><a href="mysqli.connect-error.php">mysqli::$connect_error</a> — Returns a description of the last connection error</li><li><a href="mysqli.construct.php">mysqli::__construct</a> — Open a new connection to the MySQL server</li><li><a href="mysqli.debug.php">mysqli::debug</a> — Performs debugging operations</li><li><a href="mysqli.dump-debug-info.php">mysqli::dump_debug_info</a> — Dump debugging information into the log</li><li><a href="mysqli.errno.php">mysqli::$errno</a> — Returns the error code for the most recent function call</li><li><a href="mysqli.error.php">mysqli::$error</a> — Returns a string description of the last error</li><li><a href="mysqli.error-list.php">mysqli::$error_list</a> — Returns a list of errors from the last command executed</li><li><a href="mysqli.execute-query.php">mysqli::execute_query</a> — Prepares, binds parameters, and executes SQL statement</li><li><a href="mysqli.field-count.php">mysqli::$field_count</a> — Returns the number of columns for the most recent query</li><li><a href="mysqli.get-charset.php">mysqli::get_charset</a> — Returns a character set object</li><li><a href="mysqli.get-client-info.php">mysqli::$client_info</a> — Get MySQL client info</li><li><a href="mysqli.get-client-version.php">mysqli::$client_version</a> — Returns the MySQL client version as an integer</li><li><a href="mysqli.get-connection-stats.php">mysqli::get_connection_stats</a> — Returns statistics about the client connection</li><li><a href="mysqli.get-host-info.php">mysqli::$host_info</a> — Returns a string representing the type of connection used</li><li><a href="mysqli.get-proto-info.php">mysqli::$protocol_version</a> — Returns the version of the MySQL protocol used</li><li><a href="mysqli.get-server-info.php">mysqli::$server_info</a> — Returns the version of the MySQL server</li><li><a href="mysqli.get-server-version.php">mysqli::$server_version</a> — Returns the version of the MySQL server as an integer</li><li><a href="mysqli.get-warnings.php">mysqli::get_warnings</a> — Get result of SHOW WARNINGS</li><li><a href="mysqli.info.php">mysqli::$info</a> — Retrieves information about the most recently executed query</li><li><a href="mysqli.init.php">mysqli::init</a> — Initializes MySQLi and returns an object for use with mysqli_real_connect()</li><li><a href="mysqli.insert-id.php">mysqli::$insert_id</a> — Returns the value generated for an AUTO_INCREMENT column by the last query</li><li><a href="mysqli.kill.php">mysqli::kill</a> — Asks the server to kill a MySQL thread</li><li><a href="mysqli.more-results.php">mysqli::more_results</a> — Check if there are any more query results from a multi query</li><li><a href="mysqli.multi-query.php">mysqli::multi_query</a> — Performs one or more queries on the database</li><li><a href="mysqli.next-result.php">mysqli::next_result</a> — Prepare next result from multi_query</li><li><a href="mysqli.options.php">mysqli::options</a> — Set options</li><li><a href="mysqli.ping.php">mysqli::ping</a> — Pings a server connection, or tries to reconnect if the connection has gone down</li><li><a href="mysqli.poll.php">mysqli::poll</a> — Poll connections</li><li><a href="mysqli.prepare.php">mysqli::prepare</a> — Prepares an SQL statement for execution</li><li><a href="mysqli.query.php">mysqli::query</a> — Performs a query on the database</li><li><a href="mysqli.real-connect.php">mysqli::real_connect</a> — Opens a connection to the MySQL server</li><li><a href="mysqli.real-escape-string.php">mysqli::real_escape_string</a> — Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the connection</li><li><a href="mysqli.real-query.php">mysqli::real_query</a> — Execute an SQL query</li><li><a href="mysqli.reap-async-query.php">mysqli::reap_async_query</a> — Get result from async query</li><li><a href="mysqli.refresh.php">mysqli::refresh</a> — Refreshes</li><li><a href="mysqli.release-savepoint.php">mysqli::release_savepoint</a> — Removes the named savepoint from the set of savepoints of the current transaction</li><li><a href="mysqli.rollback.php">mysqli::rollback</a> — Rolls back current transaction</li><li><a href="mysqli.savepoint.php">mysqli::savepoint</a> — Set a named transaction savepoint</li><li><a href="mysqli.select-db.php">mysqli::select_db</a> — Selects the default database for database queries</li><li><a href="mysqli.set-charset.php">mysqli::set_charset</a> — Sets the client character set</li><li><a href="mysqli.sqlstate.php">mysqli::$sqlstate</a> — Returns the SQLSTATE error from previous MySQL operation</li><li><a href="mysqli.ssl-set.php">mysqli::ssl_set</a> — Used for establishing secure connections using SSL</li><li><a href="mysqli.stat.php">mysqli::stat</a> — Gets the current system status</li><li><a href="mysqli.stmt-init.php">mysqli::stmt_init</a> — Initializes a statement and returns an object for use with mysqli_stmt_prepare</li><li><a href="mysqli.store-result.php">mysqli::store_result</a> — Transfers a result set from the last query</li><li><a href="mysqli.thread-id.php">mysqli::$thread_id</a> — Returns the thread ID for the current connection</li><li><a href="mysqli.thread-safe.php">mysqli::thread_safe</a> — Returns whether thread safety is given or not</li><li><a href="mysqli.use-result.php">mysqli::use_result</a> — Initiate a result set retrieval</li><li><a href="mysqli.warning-count.php">mysqli::$warning_count</a> — Returns the number of warnings generated by the most recently executed query</li></ul></li><li><a href="class.mysqli-stmt.php">mysqli_stmt</a> — The mysqli_stmt class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli-stmt.affected-rows.php">mysqli_stmt::$affected_rows</a> — Returns the total number of rows changed, deleted, inserted, or
  matched by the last statement executed</li><li><a href="mysqli-stmt.attr-get.php">mysqli_stmt::attr_get</a> — Used to get the current value of a statement attribute</li><li><a href="mysqli-stmt.attr-set.php">mysqli_stmt::attr_set</a> — Used to modify the behavior of a prepared statement</li><li><a href="mysqli-stmt.bind-param.php">mysqli_stmt::bind_param</a> — Binds variables to a prepared statement as parameters</li><li><a href="mysqli-stmt.bind-result.php">mysqli_stmt::bind_result</a> — Binds variables to a prepared statement for result storage</li><li><a href="mysqli-stmt.close.php">mysqli_stmt::close</a> — Closes a prepared statement</li><li><a href="mysqli-stmt.construct.php">mysqli_stmt::__construct</a> — Constructs a new mysqli_stmt object</li><li><a href="mysqli-stmt.data-seek.php">mysqli_stmt::data_seek</a> — Adjusts the result pointer to an arbitrary row in the buffered result</li><li><a href="mysqli-stmt.errno.php">mysqli_stmt::$errno</a> — Returns the error code for the most recent statement call</li><li><a href="mysqli-stmt.error.php">mysqli_stmt::$error</a> — Returns a string description for last statement error</li><li><a href="mysqli-stmt.error-list.php">mysqli_stmt::$error_list</a> — Returns a list of errors from the last statement executed</li><li><a href="mysqli-stmt.execute.php">mysqli_stmt::execute</a> — Executes a prepared statement</li><li><a href="mysqli-stmt.fetch.php">mysqli_stmt::fetch</a> — Fetch results from a prepared statement into the bound variables</li><li><a href="mysqli-stmt.field-count.php">mysqli_stmt::$field_count</a> — Returns the number of columns in the given statement</li><li><a href="mysqli-stmt.free-result.php">mysqli_stmt::free_result</a> — Frees stored result memory for the given statement handle</li><li><a href="mysqli-stmt.get-result.php">mysqli_stmt::get_result</a> — Gets a result set from a prepared statement as a mysqli_result object</li><li><a href="mysqli-stmt.get-warnings.php">mysqli_stmt::get_warnings</a> — Get result of SHOW WARNINGS</li><li><a href="mysqli-stmt.insert-id.php">mysqli_stmt::$insert_id</a> — Get the ID generated from the previous INSERT operation</li><li><a href="mysqli-stmt.more-results.php">mysqli_stmt::more_results</a> — Check if there are more query results from a multiple query</li><li><a href="mysqli-stmt.next-result.php">mysqli_stmt::next_result</a> — Reads the next result from a multiple query</li><li><a href="mysqli-stmt.num-rows.php">mysqli_stmt::$num_rows</a> — Returns the number of rows fetched from the server</li><li><a href="mysqli-stmt.param-count.php">mysqli_stmt::$param_count</a> — Returns the number of parameters for the given statement</li><li><a href="mysqli-stmt.prepare.php">mysqli_stmt::prepare</a> — Prepares an SQL statement for execution</li><li><a href="mysqli-stmt.reset.php">mysqli_stmt::reset</a> — Resets a prepared statement</li><li><a href="mysqli-stmt.result-metadata.php">mysqli_stmt::result_metadata</a> — Returns result set metadata from a prepared statement</li><li><a href="mysqli-stmt.send-long-data.php">mysqli_stmt::send_long_data</a> — Send data in blocks</li><li><a href="mysqli-stmt.sqlstate.php">mysqli_stmt::$sqlstate</a> — Returns SQLSTATE error from previous statement operation</li><li><a href="mysqli-stmt.store-result.php">mysqli_stmt::store_result</a> — Stores a result set in an internal buffer</li></ul></li><li><a href="class.mysqli-result.php">mysqli_result</a> — The mysqli_result class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli-result.construct.php">mysqli_result::__construct</a> — Constructs a mysqli_result object</li><li><a href="mysqli-result.current-field.php">mysqli_result::$current_field</a> — Get current field offset of a result pointer</li><li><a href="mysqli-result.data-seek.php">mysqli_result::data_seek</a> — Adjusts the result pointer to an arbitrary row in the result</li><li><a href="mysqli-result.fetch-all.php">mysqli_result::fetch_all</a> — Fetch all result rows as an associative array, a numeric array, or both</li><li><a href="mysqli-result.fetch-array.php">mysqli_result::fetch_array</a> — Fetch the next row of a result set as an associative, a numeric array, or both</li><li><a href="mysqli-result.fetch-assoc.php">mysqli_result::fetch_assoc</a> — Fetch the next row of a result set as an associative array</li><li><a href="mysqli-result.fetch-column.php">mysqli_result::fetch_column</a> — Fetch a single column from the next row of a result set</li><li><a href="mysqli-result.fetch-field.php">mysqli_result::fetch_field</a> — Returns the next field in the result set</li><li><a href="mysqli-result.fetch-field-direct.php">mysqli_result::fetch_field_direct</a> — Fetch meta-data for a single field</li><li><a href="mysqli-result.fetch-fields.php">mysqli_result::fetch_fields</a> — Returns an array of objects representing the fields in a result set</li><li><a href="mysqli-result.fetch-object.php">mysqli_result::fetch_object</a> — Fetch the next row of a result set as an object</li><li><a href="mysqli-result.fetch-row.php">mysqli_result::fetch_row</a> — Fetch the next row of a result set as an enumerated array</li><li><a href="mysqli-result.field-count.php">mysqli_result::$field_count</a> — Gets the number of fields in the result set</li><li><a href="mysqli-result.field-seek.php">mysqli_result::field_seek</a> — Set result pointer to a specified field offset</li><li><a href="mysqli-result.free.php">mysqli_result::free</a> — Frees the memory associated with a result</li><li><a href="mysqli-result.getiterator.php">mysqli_result::getIterator</a> — Retrieve an external iterator</li><li><a href="mysqli-result.lengths.php">mysqli_result::$lengths</a> — Returns the lengths of the columns of the current row in the result set</li><li><a href="mysqli-result.num-rows.php">mysqli_result::$num_rows</a> — Gets the number of rows in the result set</li></ul></li><li><a href="class.mysqli-driver.php">mysqli_driver</a> — The mysqli_driver class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli-driver.embedded-server-end.php">mysqli_driver::embedded_server_end</a> — Stop embedded server</li><li><a href="mysqli-driver.embedded-server-start.php">mysqli_driver::embedded_server_start</a> — Initialize and start embedded server</li><li><a href="mysqli-driver.report-mode.php">mysqli_driver::$report_mode</a> — Sets mysqli error reporting mode</li></ul></li><li><a href="class.mysqli-warning.php">mysqli_warning</a> — The mysqli_warning class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli-warning.construct.php">mysqli_warning::__construct</a> — Private constructor to disallow direct instantiation</li><li><a href="mysqli-warning.next.php">mysqli_warning::next</a> — Fetch next warning</li></ul></li><li><a href="class.mysqli-sql-exception.php">mysqli_sql_exception</a> — The mysqli_sql_exception class<ul class="chunklist chunklist_book chunklist_children"><li><a href="mysqli-sql-exception.getsqlstate.php">mysqli_sql_exception::getSqlState</a> — Returns the SQLSTATE error code</li></ul></li><li><a href="ref.mysqli.php">Aliases and deprecated Mysqli Funzioni</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="function.mysqli-connect.php">mysqli_connect</a> — Alias di mysqli::__construct</li><li><a href="function.mysqli-escape-string.php">mysqli::escape_string</a> — Alias di mysqli_real_escape_string</li><li><a href="function.mysqli-execute.php">mysqli_execute</a> — Alias di mysqli_stmt_execute</li><li><a href="function.mysqli-get-client-stats.php">mysqli_get_client_stats</a> — Returns client per-process statistics</li><li><a href="function.mysqli-get-links-stats.php">mysqli_get_links_stats</a> — Return information about open and cached links</li><li><a href="function.mysqli-report.php">mysqli_report</a> — Alias di mysqli_driver-&gt;report_mode</li><li><a href="function.mysqli-set-opt.php">mysqli::set_opt</a> — Alias di mysqli_options</li></ul></li><li><a href="changelog.mysqli.php">Storico dei cambiamenti</a></li></ul></div><?php manual_footer($setup); ?>