This either means that the username and password information in your wp-config.php file is incorrect or we can't contact the database server at %s. This could mean your host's database server is down.
If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.
"/*/WP_I18N_DB_CONN_ERROR*/, $dbhost), 'db_connect_fail'); return; } $this->ready = true; if ( $this->has_cap( 'collation' ) && !empty($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*/'Invalid database prefix'/*/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; $this->bail(sprintf(/*WP_I18N_DB_SELECT_DB*/'We were able to connect to the database server (which means your username and password is okay) but not able to select the %1$s database.
%2$s have permission to use the %1$s database?username_%1$s. Could that be the problem?If you don\'t know how to setup a database you should contact your host. If all else fails you may find help at the WordPress Support Forums.
'/*/WP_I18N_DB_SELECT_DB*/, $db, $this->dbuser), 'db_select_fail'); return; } } function _weak_escape($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() )
$error_str = sprintf(/*WP_I18N_DB_QUERY_ERROR_FULL*/'WordPress database error %1$s for query %2$s made by %3$s'/*/WP_I18N_DB_QUERY_ERROR_FULL*/, $str, $this->last_query, $caller);
else
$error_str = sprintf(/*WP_I18N_DB_QUERY_ERROR*/'WordPress database error %1$s for 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) -- Output type must be one of: 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 The Error message
* @param string $error_code (optional) A Computer readable string to identify the error.
* @return false|void
*/
function bail($message, $error_code = '500') {
if ( !$this->show_errors ) {
if ( class_exists('WP_Error') )
$this->error = new WP_Error($error_code, $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 $wp_version;
// Make sure the server has MySQL 4.1.2
if ( version_compare($this->db_version(), '4.1.2', '<') )
return new WP_Error('database_version',sprintf(__('ERROR: WordPress %s requires MySQL 4.1.2 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);
}
?>