Ciò significa che le informazioni sul nome utente o sulla password presenti nel file wp-config.php non sono corrette o che non è possibile contattare il server del database a %s. Il che potrebbe voler dire che il database server del fornitore di hosting non è attivo.
Nel caso non si abbia certezza sul significato di questi termini è opportuno contattare il proprio host. Se si ha bisogno di ulteriore aiuto è sempre possibile visitare il Forum di supporto italiano su WordPress.
'/*/WP_I18N_DB_CONN_ERROR*/, $dbhost)); return; } $this->ready = true; if ( $this->has_cap( 'collation' ) ) { if ( !empty($this->charset) ) { if ( function_exists('mysql_set_charset') ) { mysql_set_charset($this->charset, $this->dbh); $this->real_escape = true; } else { $collation_query = "SET NAMES '{$this->charset}'"; if ( !empty($this->collate) ) $collation_query .= " COLLATE '{$this->collate}'"; $this->query($collation_query); } } } $this->select($dbname); } /** * PHP5 style destructor and will run when database object is destroyed. * * @since 2.0.8 * * @return bool Always true */ function __destruct() { return true; } /** * Sets the table prefix for the WordPress tables. * * Also allows for the CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE to * override the WordPress users and usersmeta tables that would otherwise be determined by the $prefix. * * @since 2.5.0 * * @param string $prefix Alphanumeric name for the new prefix. * @return string|WP_Error Old prefix or WP_Error on error */ function set_prefix($prefix) { if ( preg_match('|[^a-z0-9_]|i', $prefix) ) return new WP_Error('invalid_db_prefix', /*WP_I18N_DB_BAD_PREFIX*/'Prefisso database non valido'/*/WP_I18N_DB_BAD_PREFIX*/); $old_prefix = $this->prefix; $this->prefix = $prefix; foreach ( (array) $this->tables as $table ) $this->$table = $this->prefix . $table; if ( defined('CUSTOM_USER_TABLE') ) $this->users = CUSTOM_USER_TABLE; if ( defined('CUSTOM_USER_META_TABLE') ) $this->usermeta = CUSTOM_USER_META_TABLE; return $old_prefix; } /** * Selects a database using the current database connection. * * The database name will be changed based on the current database * connection. On failure, the execution will bail and display an DB error. * * @since 0.71 * * @param string $db MySQL database name * @return null Always null. */ function select($db) { if (!@mysql_select_db($db, $this->dbh)) { $this->ready = false; $this->bail(sprintf(/*WP_I18N_DB_SELECT_DB*/'È stato possibile connettersi al server del database (il che significa che il nome utente e la password sono ok) ma non è stato possibile selezionare il database %1$s.
%2$s ha i permessi di usare il database %1$s?Se non si sa come impostare un database sarebbe opportuno contattare il proprio host. Se tutto questo fallisce è possibile trovare aiuto sul Forum di supporto italiano su WordPress.
'/*/WP_I18N_DB_SELECT_DB*/, $db, DB_USER)); return; } } function _weak_escape($string) { return addslashes($string); } function _real_escape($string) { if ( $this->dbh && $this->real_escape ) return mysql_real_escape_string( $string, $this->dbh ); else return addslashes( $string ); } function _escape($data) { if ( is_array($data) ) { foreach ( (array) $data as $k => $v ) { if ( is_array($v) ) $data[$k] = $this->_escape( $v ); else $data[$k] = $this->_real_escape( $v ); } } else { $data = $this->_real_escape( $data ); } return $data; } /** * Escapes content for insertion into the database using addslashes(), for security * * @since 0.71 * * @param string|array $data * @return string query safe string */ function escape($data) { if ( is_array($data) ) { foreach ( (array) $data as $k => $v ) { if ( is_array($v) ) $data[$k] = $this->escape( $v ); else $data[$k] = $this->_weak_escape( $v ); } } else { $data = $this->_weak_escape( $data ); } return $data; } /** * Escapes content by reference for insertion into the database, for security * * @since 2.3.0 * * @param string $s */ function escape_by_ref(&$string) { $string = $this->_real_escape( $string ); } /** * Prepares a SQL query for safe execution. Uses sprintf()-like syntax. * * This function only supports a small subset of the sprintf syntax; it only supports %d (decimal number), %s (string). * Does not support sign, padding, alignment, width or precision specifiers. * Does not support argument numbering/swapping. * * May be called like {@link http://php.net/sprintf sprintf()} or like {@link http://php.net/vsprintf vsprintf()}. * * Both %d and %s should be left unquoted in the query string. * *
* wpdb::prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d", "foo", 1337 )
*
*
* @link http://php.net/sprintf Description of syntax.
* @since 2.3.0
*
* @param string $query Query statement with sprintf()-like placeholders
* @param array|mixed $args The array of variables to substitute into the query's placeholders if being called like {@link http://php.net/vsprintf vsprintf()}, or the first variable to substitute into the query's placeholders if being called like {@link http://php.net/sprintf sprintf()}.
* @param mixed $args,... further variables to substitute into the query's placeholders if being called like {@link http://php.net/sprintf sprintf()}.
* @return null|string Sanitized query string
*/
function prepare($query = null) { // ( $query, *$args )
if ( is_null( $query ) )
return;
$args = func_get_args();
array_shift($args);
// If args were passed as an array (as in vsprintf), move them up
if ( isset($args[0]) && is_array($args[0]) )
$args = $args[0];
$query = str_replace("'%s'", '%s', $query); // in case someone mistakenly already singlequoted it
$query = str_replace('"%s"', '%s', $query); // doublequote unquoting
$query = str_replace('%s', "'%s'", $query); // quote the strings
array_walk($args, array(&$this, 'escape_by_ref'));
return @vsprintf($query, $args);
}
/**
* Print SQL/DB error.
*
* @since 0.71
* @global array $EZSQL_ERROR Stores error information of query and error string
*
* @param string $str The error to display
* @return bool False if the showing of errors is disabled.
*/
function print_error($str = '') {
global $EZSQL_ERROR;
if (!$str) $str = mysql_error($this->dbh);
$EZSQL_ERROR[] = array ('query' => $this->last_query, 'error_str' => $str);
if ( $this->suppress_errors )
return false;
if ( $caller = $this->get_caller() )
$error_str = sprintf(/*WP_I18N_DB_QUERY_ERROR_FULL*/'WordPress errore sul database %1$s per la query %2$s fatta da %3$s'/*/WP_I18N_DB_QUERY_ERROR_FULL*/, $str, $this->last_query, $caller);
else
$error_str = sprintf(/*WP_I18N_DB_QUERY_ERROR*/'WordPress errore database %1$s per la query %2$s'/*/WP_I18N_DB_QUERY_ERROR*/, $str, $this->last_query);
$log_error = true;
if ( ! function_exists('error_log') )
$log_error = false;
$log_file = @ini_get('error_log');
if ( !empty($log_file) && ('syslog' != $log_file) && !@is_writable($log_file) )
$log_error = false;
if ( $log_error )
@error_log($error_str, 0);
// Is error output turned on or not..
if ( !$this->show_errors )
return false;
$str = htmlspecialchars($str, ENT_QUOTES);
$query = htmlspecialchars($this->last_query, ENT_QUOTES);
// If there is an error then take note of it
print "WordPress database error: [$str]
$query
* wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) )
*
*
* @since 2.5.0
* @see wpdb::prepare()
*
* @param string $table table name
* @param array $data Data to insert (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped).
* @param array|string $format (optional) An array of formats to be mapped to each of the value in $data. If string, that format will be used for all of the values in $data. A format is one of '%d', '%s' (decimal number, string). If omitted, all values in $data will be treated as strings.
* @return int|false The number of rows inserted, or false on error.
*/
function insert($table, $data, $format = null) {
$formats = $format = (array) $format;
$fields = array_keys($data);
$formatted_fields = array();
foreach ( $fields as $field ) {
if ( !empty($format) )
$form = ( $form = array_shift($formats) ) ? $form : $format[0];
elseif ( isset($this->field_types[$field]) )
$form = $this->field_types[$field];
else
$form = '%s';
$formatted_fields[] = $form;
}
$sql = "INSERT INTO `$table` (`" . implode( '`,`', $fields ) . "`) VALUES ('" . implode( "','", $formatted_fields ) . "')";
return $this->query( $this->prepare( $sql, $data) );
}
/**
* Update a row in the table
*
*
* wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) )
*
*
* @since 2.5.0
* @see wpdb::prepare()
*
* @param string $table table name
* @param array $data Data to update (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped).
* @param array $where A named array of WHERE clauses (in column => value pairs). Multiple clauses will be joined with ANDs. Both $where columns and $where values should be "raw".
* @param array|string $format (optional) An array of formats to be mapped to each of the values in $data. If string, that format will be used for all of the values in $data. A format is one of '%d', '%s' (decimal number, string). If omitted, all values in $data will be treated as strings.
* @param array|string $format_where (optional) An array of formats to be mapped to each of the values in $where. If string, that format will be used for all of the items in $where. A format is one of '%d', '%s' (decimal number, string). If omitted, all values in $where will be treated as strings.
* @return int|false The number of rows updated, or false on error.
*/
function update($table, $data, $where, $format = null, $where_format = null) {
if ( !is_array( $where ) )
return false;
$formats = $format = (array) $format;
$bits = $wheres = array();
foreach ( (array) array_keys($data) as $field ) {
if ( !empty($format) )
$form = ( $form = array_shift($formats) ) ? $form : $format[0];
elseif ( isset($this->field_types[$field]) )
$form = $this->field_types[$field];
else
$form = '%s';
$bits[] = "`$field` = {$form}";
}
$where_formats = $where_format = (array) $where_format;
foreach ( (array) array_keys($where) as $field ) {
if ( !empty($where_format) )
$form = ( $form = array_shift($where_formats) ) ? $form : $where_format[0];
elseif ( isset($this->field_types[$field]) )
$form = $this->field_types[$field];
else
$form = '%s';
$wheres[] = "`$field` = {$form}";
}
$sql = "UPDATE `$table` SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres );
return $this->query( $this->prepare( $sql, array_merge(array_values($data), array_values($where))) );
}
/**
* Retrieve one variable from the database.
*
* Executes a SQL query and returns the value from the SQL result.
* If the SQL result contains more than one column and/or more than one row, this function returns the value in the column and row specified.
* If $query is null, this function returns the value in the specified column and row from the previous SQL result.
*
* @since 0.71
*
* @param string|null $query SQL query. If null, use the result from the previous query.
* @param int $x (optional) Column of value to return. Indexed from 0.
* @param int $y (optional) Row of value to return. Indexed from 0.
* @return string Database query result
*/
function get_var($query=null, $x = 0, $y = 0) {
$this->func_call = "\$db->get_var(\"$query\",$x,$y)";
if ( $query )
$this->query($query);
// Extract var out of cached results based x,y vals
if ( !empty( $this->last_result[$y] ) ) {
$values = array_values(get_object_vars($this->last_result[$y]));
}
// If there is a value return it else return null
return (isset($values[$x]) && $values[$x]!=='') ? $values[$x] : null;
}
/**
* Retrieve one row from the database.
*
* Executes a SQL query and returns the row from the SQL result.
*
* @since 0.71
*
* @param string|null $query SQL query.
* @param string $output (optional) one of ARRAY_A | ARRAY_N | OBJECT constants. Return an associative array (column => value, ...), a numerically indexed array (0 => value, ...) or an object ( ->column = value ), respectively.
* @param int $y (optional) Row to return. Indexed from 0.
* @return mixed Database query result in format specifed by $output
*/
function get_row($query = null, $output = OBJECT, $y = 0) {
$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
if ( $query )
$this->query($query);
else
return null;
if ( !isset($this->last_result[$y]) )
return null;
if ( $output == OBJECT ) {
return $this->last_result[$y] ? $this->last_result[$y] : null;
} elseif ( $output == ARRAY_A ) {
return $this->last_result[$y] ? get_object_vars($this->last_result[$y]) : null;
} elseif ( $output == ARRAY_N ) {
return $this->last_result[$y] ? array_values(get_object_vars($this->last_result[$y])) : null;
} else {
$this->print_error(/*WP_I18N_DB_GETROW_ERROR*/' $db->get_row(string query, output type, int offset) -- Il risultato deve essere uno fra questi: OBJECT, ARRAY_A, ARRAY_N'/*/WP_I18N_DB_GETROW_ERROR*/);
}
}
/**
* Retrieve one column from the database.
*
* Executes a SQL query and returns the column from the SQL result.
* If the SQL result contains more than one column, this function returns the column specified.
* If $query is null, this function returns the specified column from the previous SQL result.
*
* @since 0.71
*
* @param string|null $query SQL query. If null, use the result from the previous query.
* @param int $x Column to return. Indexed from 0.
* @return array Database query result. Array indexed from 0 by SQL result row number.
*/
function get_col($query = null , $x = 0) {
if ( $query )
$this->query($query);
$new_array = array();
// Extract the column values
for ( $i=0; $i < count($this->last_result); $i++ ) {
$new_array[$i] = $this->get_var(null, $x, $i);
}
return $new_array;
}
/**
* Retrieve an entire SQL result set from the database (i.e., many rows)
*
* Executes a SQL query and returns the entire SQL result.
*
* @since 0.71
*
* @param string $query SQL query.
* @param string $output (optional) ane of ARRAY_A | ARRAY_N | OBJECT | OBJECT_K constants. With one of the first three, return an array of rows indexed from 0 by SQL result row number. Each row is an associative array (column => value, ...), a numerically indexed array (0 => value, ...), or an object. ( ->column = value ), respectively. With OBJECT_K, return an associative array of row objects keyed by the value of each row's first column's value. Duplicate keys are discarded.
* @return mixed Database query results
*/
function get_results($query = null, $output = OBJECT) {
$this->func_call = "\$db->get_results(\"$query\", $output)";
if ( $query )
$this->query($query);
else
return null;
if ( $output == OBJECT ) {
// Return an integer-keyed array of row objects
return $this->last_result;
} elseif ( $output == OBJECT_K ) {
// Return an array of row objects with keys from column 1
// (Duplicates are discarded)
foreach ( $this->last_result as $row ) {
$key = array_shift( get_object_vars( $row ) );
if ( !isset( $new_array[ $key ] ) )
$new_array[ $key ] = $row;
}
return $new_array;
} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
// Return an integer-keyed array of...
if ( $this->last_result ) {
$i = 0;
foreach( (array) $this->last_result as $row ) {
if ( $output == ARRAY_N ) {
// ...integer-keyed row arrays
$new_array[$i] = array_values( get_object_vars( $row ) );
} else {
// ...column name-keyed row arrays
$new_array[$i] = get_object_vars( $row );
}
++$i;
}
return $new_array;
}
}
}
/**
* Retrieve column metadata from the last query.
*
* @since 0.71
*
* @param string $info_type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill
* @param int $col_offset 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type
* @return mixed Column Results
*/
function get_col_info($info_type = 'name', $col_offset = -1) {
if ( $this->col_info ) {
if ( $col_offset == -1 ) {
$i = 0;
foreach( (array) $this->col_info as $col ) {
$new_array[$i] = $col->{$info_type};
$i++;
}
return $new_array;
} else {
return $this->col_info[$col_offset]->{$info_type};
}
}
}
/**
* Starts the timer, for debugging purposes.
*
* @since 1.5.0
*
* @return true
*/
function timer_start() {
$mtime = microtime();
$mtime = explode(' ', $mtime);
$this->time_start = $mtime[1] + $mtime[0];
return true;
}
/**
* Stops the debugging timer.
*
* @since 1.5.0
*
* @return int Total time spent on the query, in milliseconds
*/
function timer_stop() {
$mtime = microtime();
$mtime = explode(' ', $mtime);
$time_end = $mtime[1] + $mtime[0];
$time_total = $time_end - $this->time_start;
return $time_total;
}
/**
* Wraps errors in a nice header and footer and dies.
*
* Will not die if wpdb::$show_errors is true
*
* @since 1.5.0
*
* @param string $message
* @return false|void
*/
function bail($message) {
if ( !$this->show_errors ) {
if ( class_exists('WP_Error') )
$this->error = new WP_Error('500', $message);
else
$this->error = $message;
return false;
}
wp_die($message);
}
/**
* Whether or not MySQL database is at least the required minimum version.
*
* @since 2.5.0
* @uses $wp_version
*
* @return WP_Error
*/
function check_database_version()
{
global $wp_version;
// Make sure the server has MySQL 4.0
if ( version_compare($this->db_version(), '4.0.0', '<') )
return new WP_Error('database_version',sprintf(__('ERROR: WordPress %s requires MySQL 4.0.0 or higher'), $wp_version));
}
/**
* Whether of not the database supports collation.
*
* Called when WordPress is generating the table scheme.
*
* @since 2.5.0
*
* @return bool True if collation is supported, false if version does not
*/
function supports_collation()
{
return $this->has_cap( 'collation' );
}
/**
* Generic function to determine if a database supports a particular feature
* @param string $db_cap the feature
* @param false|string|resource $dbh_or_table (not implemented) Which database to test. False = the currently selected database, string = the database containing the specified table, resource = the database corresponding to the specified mysql resource.
* @return bool
*/
function has_cap( $db_cap ) {
$version = $this->db_version();
switch ( strtolower( $db_cap ) ) :
case 'collation' : // @since 2.5.0
case 'group_concat' : // @since 2.7
case 'subqueries' : // @since 2.7
return version_compare($version, '4.1', '>=');
break;
endswitch;
return false;
}
/**
* Retrieve the name of the function that called wpdb.
*
* Requires PHP 4.3 and searches up the list of functions until it reaches
* the one that would most logically had called this method.
*
* @since 2.5.0
*
* @return string The name of the calling function
*/
function get_caller() {
// requires PHP 4.3+
if ( !is_callable('debug_backtrace') )
return '';
$bt = debug_backtrace();
$caller = array();
$bt = array_reverse( $bt );
foreach ( (array) $bt as $call ) {
if ( @$call['class'] == __CLASS__ )
continue;
$function = $call['function'];
if ( isset( $call['class'] ) )
$function = $call['class'] . "->$function";
$caller[] = $function;
}
$caller = join( ', ', $caller );
return $caller;
}
/**
* The database version number
* @param false|string|resource $dbh_or_table (not implemented) Which database to test. False = the currently selected database, string = the database containing the specified table, resource = the database corresponding to the specified mysql resource.
* @return false|string false on failure, version number on success
*/
function db_version() {
return preg_replace('/[^0-9.].*/', '', mysql_get_server_info( $this->dbh ));
}
}
if ( ! isset($wpdb) ) {
/**
* WordPress Database Object, if it isn't set already in wp-content/db.php
* @global object $wpdb Creates a new wpdb object based on wp-config.php Constants for the database
* @since 0.71
*/
$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
}
?>