*
* It is possible to replace this class with your own
* by setting the $wpdb global variable in wp-content/db.php
- * file with your class. You can name it wpdb also, since
- * this file will not be included, if the other file is
- * available.
+ * file to your class. The wpdb class will still be included,
+ * so you can extend it or simply use your own.
*
* @link http://codex.wordpress.org/Function_Reference/wpdb_Class
*
* @package WordPress
* @subpackage Database
* @since 0.71
- * @final
*/
class wpdb {
* Whether to suppress errors during the DB bootstrapping.
*
* @access private
- * @since 2.5
+ * @since 2.5.0
* @var bool
*/
var $suppress_errors = false;
/**
* The last error during query.
*
- * @see get_last_error()
- * @since 2.5
- * @access private
+ * @since 2.5.0
* @var string
*/
var $last_error = '';
/**
* Count of rows returned by previous query
*
- * @since 1.2
+ * @since 1.2.0
* @access private
* @var int
*/
/**
* A textual description of the last query/get_row/get_var call
*
- * @since unknown
+ * @since 3.0.0
* @access public
* @var string
*/
var $func_call;
/**
- * Connects to the database server and selects a database
+ * Whether MySQL is used as the database engine.
*
- * PHP4 compatibility layer for calling the PHP5 constructor.
+ * Set in WPDB::db_connect() to true, by default. This is used when checking
+ * against the required MySQL version for WordPress. Normally, a replacement
+ * database drop-in (db.php) will skip these checks, but setting this to true
+ * will force the checks to occur.
*
- * @uses wpdb::__construct() Passes parameters and returns result
- * @since 0.71
- *
- * @param string $dbuser MySQL database user
- * @param string $dbpassword MySQL database password
- * @param string $dbname MySQL database name
- * @param string $dbhost MySQL database host
+ * @since 3.3.0
+ * @access public
+ * @var bool
*/
- function wpdb( $dbuser, $dbpassword, $dbname, $dbhost ) {
- if( defined( 'WP_USE_MULTIPLE_DB' ) && WP_USE_MULTIPLE_DB )
- $this->db_connect();
- return $this->__construct( $dbuser, $dbpassword, $dbname, $dbhost );
- }
+ public $is_mysql = null;
/**
* Connects to the database server and selects a database
if ( WP_DEBUG )
$this->show_errors();
- if ( is_multisite() ) {
+ $this->init_charset();
+
+ $this->dbuser = $dbuser;
+ $this->dbpassword = $dbpassword;
+ $this->dbname = $dbname;
+ $this->dbhost = $dbhost;
+
+ $this->db_connect();
+ }
+
+ /**
+ * PHP5 style destructor and will run when database object is destroyed.
+ *
+ * @see wpdb::__construct()
+ * @since 2.0.8
+ * @return bool true
+ */
+ function __destruct() {
+ return true;
+ }
+
+ /**
+ * Set $this->charset and $this->collate
+ *
+ * @since 3.1.0
+ */
+ function init_charset() {
+ if ( function_exists('is_multisite') && is_multisite() ) {
$this->charset = 'utf8';
if ( defined( 'DB_COLLATE' ) && DB_COLLATE )
$this->collate = DB_COLLATE;
if ( defined( 'DB_CHARSET' ) )
$this->charset = DB_CHARSET;
-
- $this->dbuser = $dbuser;
-
- $this->dbh = @mysql_connect( $dbhost, $dbuser, $dbpassword, true );
- if ( !$this->dbh ) {
- $this->bail( sprintf( /*WP_I18N_DB_CONN_ERROR*/"
-<h1>Error establishing a database connection</h1>
-<p>This either means that the username and password information in your <code>wp-config.php</code> file is incorrect or we can't contact the database server at <code>%s</code>. This could mean your host's database server is down.</p>
-<ul>
- <li>Are you sure you have the correct username and password?</li>
- <li>Are you sure that you have typed the correct hostname?</li>
- <li>Are you sure that the database server is running?</li>
-</ul>
-<p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='http://wordpress.org/support/'>WordPress Support Forums</a>.</p>
-"/*/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 {
- $query = $this->prepare( 'SET NAMES %s', $this->charset );
- if ( ! empty( $this->collate ) )
- $query .= $this->prepare( ' COLLATE %s', $this->collate );
- $this->query( $query );
- }
- }
-
- $this->select( $dbname, $this->dbh );
}
/**
- * PHP5 style destructor and will run when database object is destroyed.
+ * Sets the connection's character set.
*
- * @see wpdb::__construct()
- * @since 2.0.8
- * @return bool true
+ * @since 3.1.0
+ *
+ * @param resource $dbh The resource given by mysql_connect
+ * @param string $charset The character set (optional)
+ * @param string $collate The collation (optional)
*/
- function __destruct() {
- return true;
+ function set_charset($dbh, $charset = null, $collate = null) {
+ if ( !isset($charset) )
+ $charset = $this->charset;
+ if ( !isset($collate) )
+ $collate = $this->collate;
+ if ( $this->has_cap( 'collation', $dbh ) && !empty( $charset ) ) {
+ if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset', $dbh ) ) {
+ mysql_set_charset( $charset, $dbh );
+ $this->real_escape = true;
+ } else {
+ $query = $this->prepare( 'SET NAMES %s', $charset );
+ if ( ! empty( $collate ) )
+ $query .= $this->prepare( ' COLLATE %s', $collate );
+ mysql_query( $query, $dbh );
+ }
+ }
}
/**
* @since 2.5.0
*
* @param string $prefix Alphanumeric name for the new prefix.
+ * @param bool $set_table_names Optional. Whether the table names, e.g. wpdb::$posts, should be updated or not.
* @return string|WP_Error Old prefix or WP_Error on error
*/
function set_prefix( $prefix, $set_table_names = true ) {
if ( is_multisite() ) {
if ( null === $blog_id )
$blog_id = $this->blogid;
+ $blog_id = (int) $blog_id;
if ( defined( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) )
return $this->base_prefix;
else
* Returns an array of 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
+ * override the WordPress users and usermeta tables that would otherwise
* be determined by the prefix.
*
* The scope argument can take one of the following:
* @param resource $dbh Optional link identifier.
* @return null Always null.
*/
- function select( $db, $dbh = null) {
- if ( is_null($dbh) )
+ function select( $db, $dbh = null ) {
+ if ( is_null($dbh) )
$dbh = $this->dbh;
if ( !@mysql_select_db( $db, $dbh ) ) {
$this->ready = false;
- $this->bail( sprintf( /*WP_I18N_DB_SELECT_DB*/'
-<h1>Can’t select database</h1>
+ $this->bail( sprintf( /*WP_I18N_DB_SELECT_DB*/'<h1>Can’t select database</h1>
<p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>%1$s</code> database.</p>
<ul>
<li>Are you sure it exists?</li>
*
* @see mysql_real_escape_string()
* @see addslashes()
- * @since 2.8
+ * @since 2.8.0
* @access private
*
* @param string $string to escape
/**
* Escape data. Works on arrays.
*
- * @uses wpdb::_escape()
- * @uses wpdb::_real_escape()
- * @since 2.8
+ * @uses wpdb::_escape()
+ * @uses wpdb::_real_escape()
+ * @since 2.8.0
* @access private
*
* @param string|array $data
* Prepares a SQL query for safe execution. Uses sprintf()-like syntax.
*
* The following directives can be used in the query format string:
- * %d (decimal number)
+ * %d (integer)
+ * %f (float)
* %s (string)
* %% (literal percentage sign - no argument needed)
*
- * Both %d and %s are to be left unquoted in the query string and they need an argument passed for them.
+ * All of %d, %f, and %s are to be left unquoted in the query string and they need an argument passed for them.
* Literals (%) as parts of the query must be properly written as %%.
*
- * This function only supports a small subset of the sprintf syntax; it only supports %d (decimal number), %s (string).
+ * This function only supports a small subset of the sprintf syntax; it only supports %d (integer), %f (float), and %s (string).
* Does not support sign, padding, alignment, width or precision specifiers.
* Does not support argument numbering/swapping.
*
* By default database errors are suppressed, with a simple
* call to this function they can be enabled.
*
- * @since 2.5
+ * @since 2.5.0
* @see wpdb::hide_errors()
* @param bool $suppress Optional. New value. Defaults to true.
* @return bool Old value
$this->last_query = null;
}
- function db_connect( $query = "SELECT" ) {
- global $db_list, $global_db_list;
- if ( ! is_array( $db_list ) )
- return true;
-
- if ( $this->blogs != '' && preg_match("/(" . $this->blogs . "|" . $this->users . "|" . $this->usermeta . "|" . $this->site . "|" . $this->sitemeta . "|" . $this->sitecategories . ")/i",$query) ) {
- $action = 'global';
- $details = $global_db_list[ mt_rand( 0, count( $global_db_list ) -1 ) ];
- $this->db_global = $details;
- } elseif ( preg_match("/^\\s*(alter table|create|insert|delete|update|replace) /i",$query) ) {
- $action = 'write';
- $details = $db_list[ 'write' ][ mt_rand( 0, count( $db_list[ 'write' ] ) -1 ) ];
- $this->db_write = $details;
+ /**
+ * Connect to and select database
+ *
+ * @since 3.0.0
+ */
+ function db_connect() {
+
+ $this->is_mysql = true;
+
+ if ( WP_DEBUG ) {
+ $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, true );
} else {
- $action = '';
- $details = $db_list[ 'read' ][ mt_rand( 0, count( $db_list[ 'read' ] ) -1 ) ];
- $this->db_read = $details;
+ $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, true );
}
- $dbhname = "dbh" . $action;
- $this->$dbhname = @mysql_connect( $details[ 'db_host' ], $details[ 'db_user' ], $details[ 'db_password' ] );
- if (!$this->$dbhname ) {
+ if ( !$this->dbh ) {
$this->bail( sprintf( /*WP_I18N_DB_CONN_ERROR*/"
<h1>Error establishing a database connection</h1>
<p>This either means that the username and password information in your <code>wp-config.php</code> file is incorrect or we can't contact the database server at <code>%s</code>. This could mean your host's database server is down.</p>
<li>Are you sure that the database server is running?</li>
</ul>
<p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='http://wordpress.org/support/'>WordPress Support Forums</a>.</p>
-"/*/WP_I18N_DB_CONN_ERROR*/, $details['db_host'] ), 'db_connect_fail' );
+"/*/WP_I18N_DB_CONN_ERROR*/, $this->dbhost ), 'db_connect_fail' );
+
+ return;
}
- $this->select( $details[ 'db_name' ], $this->$dbhname );
+
+ $this->set_charset( $this->dbh );
+
+ $this->ready = true;
+
+ $this->select( $this->dbname, $this->dbh );
}
/**
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES )
$this->timer_start();
- // use $this->dbh for read ops, and $this->dbhwrite for write ops
- // use $this->dbhglobal for gloal table ops
- unset( $dbh );
- if( defined( 'WP_USE_MULTIPLE_DB' ) && WP_USE_MULTIPLE_DB ) {
- if( $this->blogs != '' && preg_match("/(" . $this->blogs . "|" . $this->users . "|" . $this->usermeta . "|" . $this->site . "|" . $this->sitemeta . "|" . $this->sitecategories . ")/i",$query) ) {
- if( false == isset( $this->dbhglobal ) ) {
- $this->db_connect( $query );
- }
- $dbh =& $this->dbhglobal;
- $this->last_db_used = "global";
- } elseif ( preg_match("/^\\s*(alter table|create|insert|delete|update|replace) /i",$query) ) {
- if( false == isset( $this->dbhwrite ) ) {
- $this->db_connect( $query );
- }
- $dbh =& $this->dbhwrite;
- $this->last_db_used = "write";
- } else {
- $dbh =& $this->dbh;
- $this->last_db_used = "read";
- }
- } else {
- $dbh =& $this->dbh;
- $this->last_db_used = "other/read";
- }
-
- $this->result = @mysql_query( $query, $dbh );
+ $this->result = @mysql_query( $query, $this->dbh );
$this->num_queries++;
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES )
$this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() );
// If there is an error then take note of it..
- if ( $this->last_error = mysql_error( $dbh ) ) {
+ if ( $this->last_error = mysql_error( $this->dbh ) ) {
$this->print_error();
return false;
}
- if ( preg_match( "/^\\s*(insert|delete|update|replace|alter) /i", $query ) ) {
- $this->rows_affected = mysql_affected_rows( $dbh );
+ if ( preg_match( '/^\s*(create|alter|truncate|drop) /i', $query ) ) {
+ $return_val = $this->result;
+ } elseif ( preg_match( '/^\s*(insert|delete|update|replace) /i', $query ) ) {
+ $this->rows_affected = mysql_affected_rows( $this->dbh );
// Take note of the insert_id
- if ( preg_match( "/^\\s*(insert|replace) /i", $query ) ) {
- $this->insert_id = mysql_insert_id($dbh);
+ if ( preg_match( '/^\s*(insert|replace) /i', $query ) ) {
+ $this->insert_id = mysql_insert_id($this->dbh);
}
// Return number of rows affected
$return_val = $this->rows_affected;
* @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 $data will be treated as strings unless otherwise specified in wpdb::$field_types.
+ * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types.
* @return int|false The number of rows inserted, or false on error.
*/
function insert( $table, $data, $format = null ) {
* @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 $data will be treated as strings unless otherwise specified in wpdb::$field_types.
+ * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types.
* @return int|false The number of rows affected, or false on error.
*/
function replace( $table, $data, $format = null ) {
* @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 $data will be treated as strings unless otherwise specified in wpdb::$field_types.
+ * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types.
+ * @param string $type Optional. What type of operation is this? INSERT or REPLACE. Defaults to INSERT.
* @return int|false The number of rows affected, or false on error.
*/
function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {
* @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 $data will be treated as strings unless otherwise specified in wpdb::$field_types.
- * @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.
+ * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types.
+ * @param array|string $where_format 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', '%f', '%s' (integer, float, 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 ) {
* @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 or null on failure
+ * @return mixed Database query result in format specified by $output or null on failure
*/
function get_row( $query = null, $output = OBJECT, $y = 0 ) {
$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
// 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 ) );
+ $var_by_ref = get_object_vars( $row );
+ $key = array_shift( $var_by_ref );
if ( ! isset( $new_array[ $key ] ) )
$new_array[ $key ] = $row;
}
/**
* Determine if a database supports a particular feature
*
- * @since 2.7
+ * @since 2.7.0
* @see wpdb::db_version()
*
* @param string $db_cap the feature
case 'group_concat' : // @since 2.7
case 'subqueries' : // @since 2.7
return version_compare( $version, '4.1', '>=' );
+ case 'set_charset' :
+ return version_compare($version, '5.0.7', '>=');
};
return false;
/**
* The database version number.
*
+ * @since 2.7.0
+ *
* @return false|string false on failure, version number on success
*/
function db_version() {
}
}
-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 );
-}
?>
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