Wordpress 3.5
[autoinstalls/wordpress.git] / wp-includes / wp-db.php
index f418745929e79943ab48d10951a2da54b65ad716..391cfa4dc96fd6e027b539f059ac1245be20f18a 100644 (file)
@@ -88,7 +88,7 @@ class wpdb {
        /**
         * Count of rows returned by previous query
         *
-        * @since 1.2.0
+        * @since 0.71
         * @access private
         * @var int
         */
@@ -113,9 +113,9 @@ class wpdb {
        var $insert_id = 0;
 
        /**
-        * Saved result of the last query made
+        * Last query made
         *
-        * @since 1.2.0
+        * @since 0.71
         * @access private
         * @var array
         */
@@ -124,20 +124,29 @@ class wpdb {
        /**
         * Results of the last query made
         *
-        * @since 1.0.0
+        * @since 0.71
         * @access private
         * @var array|null
         */
        var $last_result;
 
+       /**
+        * MySQL result, which is either a resource or boolean.
+        *
+        * @since 0.71
+        * @access protected
+        * @var mixed
+        */
+       protected $result;
+
        /**
         * Saved info on the table column
         *
-        * @since 1.2.0
-        * @access private
+        * @since 0.71
+        * @access protected
         * @var array
         */
-       var $col_info;
+       protected $col_info;
 
        /**
         * Saved queries that were executed
@@ -155,7 +164,7 @@ class wpdb {
         * in a single database. The second reason is for possible
         * security precautions.
         *
-        * @since 0.71
+        * @since 2.5.0
         * @access private
         * @var string
         */
@@ -164,7 +173,7 @@ class wpdb {
        /**
         * Whether the database queries are ready to start executing.
         *
-        * @since 2.5.0
+        * @since 2.3.2
         * @access private
         * @var bool
         */
@@ -445,10 +454,46 @@ class wpdb {
         * Database Username
         *
         * @since 2.9.0
-        * @access private
+        * @access protected
+        * @var string
+        */
+       protected $dbuser;
+
+       /**
+        * Database Password
+        *
+        * @since 3.1.0
+        * @access protected
         * @var string
         */
-       var $dbuser;
+       protected $dbpassword;
+
+       /**
+        * Database Name
+        *
+        * @since 3.1.0
+        * @access protected
+        * @var string
+        */
+       protected $dbname;
+
+       /**
+        * Database Host
+        *
+        * @since 3.1.0
+        * @access protected
+        * @var string
+        */
+       protected $dbhost;
+
+       /**
+        * Database Handle
+        *
+        * @since 0.71
+        * @access protected
+        * @var string
+        */
+       protected $dbh;
 
        /**
         * A textual description of the last query/get_row/get_var call
@@ -489,7 +534,7 @@ class wpdb {
         * @param string $dbhost MySQL database host
         */
        function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {
-               register_shutdown_function( array( &$this, '__destruct' ) );
+               register_shutdown_function( array( $this, '__destruct' ) );
 
                if ( WP_DEBUG )
                        $this->show_errors();
@@ -515,6 +560,57 @@ class wpdb {
                return true;
        }
 
+       /**
+        * PHP5 style magic getter, used to lazy-load expensive data.
+        *
+        * @since 3.5.0
+        *
+        * @param string $name The private member to get, and optionally process
+        * @return mixed The private member
+        */
+       function __get( $name ) {
+               if ( 'col_info' == $name )
+                       $this->load_col_info();
+
+               return $this->$name;
+       }
+
+       /**
+        * Magic function, for backwards compatibility
+        *
+        * @since 3.5.0
+        *
+        * @param string $name  The private member to set
+        * @param mixed  $value The value to set
+        */
+       function __set( $name, $value ) {
+               $this->$name = $value;
+       }
+
+       /**
+        * Magic function, for backwards compatibility
+        *
+        * @since 3.5.0
+        *
+        * @param string $name  The private member to check
+        *
+        * @return bool If the member is set or not
+        */
+       function __isset( $name ) {
+               return isset( $this->$name );
+       }
+
+       /**
+        * Magic function, for backwards compatibility
+        *
+        * @since 3.5.0
+        *
+        * @param string $name  The private member to unset
+        */
+       function __unset( $name ) {
+               unset( $this->$name );
+       }
+
        /**
         * Set $this->charset and $this->collate
         *
@@ -850,7 +946,8 @@ class wpdb {
         * @return void
         */
        function escape_by_ref( &$string ) {
-               $string = $this->_real_escape( $string );
+               if ( ! is_float( $string ) )
+                       $string = $this->_real_escape( $string );
        }
 
        /**
@@ -890,7 +987,7 @@ class wpdb {
         * @return null|false|string Sanitized query string, null if there is no query, false if there is an error and string
         *      if there was something to prepare
         */
-       function prepare( $query = null ) { // ( $query, *$args )
+       function prepare( $query, $args ) {
                if ( is_null( $query ) )
                        return;
 
@@ -901,8 +998,9 @@ class wpdb {
                        $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 = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware
                $query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s
-               array_walk( $args, array( &$this, 'escape_by_ref' ) );
+               array_walk( $args, array( $this, 'escape_by_ref' ) );
                return @vsprintf( $query, $args );
        }
 
@@ -932,11 +1030,7 @@ class wpdb {
                else
                        $error_str = sprintf( __( 'WordPress database error %1$s for query %2$s' ), $str, $this->last_query );
 
-               if ( function_exists( 'error_log' )
-                       && ( $log_file = @ini_get( 'error_log' ) )
-                       && ( 'syslog' == $log_file || @is_writable( $log_file ) )
-                       )
-                       @error_log( $error_str );
+               error_log( $error_str );
 
                // Are we showing errors?
                if ( ! $this->show_errors )
@@ -1023,6 +1117,9 @@ class wpdb {
                $this->last_result = array();
                $this->col_info    = null;
                $this->last_query  = null;
+
+               if ( is_resource( $this->result ) )
+                       mysql_free_result( $this->result );
        }
 
        /**
@@ -1034,10 +1131,13 @@ class wpdb {
 
                $this->is_mysql = true;
 
+               $new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true;
+               $client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0;
+
                if ( WP_DEBUG ) {
-                       $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, true );
+                       $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
                } else {
-                       $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, true );
+                       $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
                }
 
                if ( !$this->dbh ) {
@@ -1104,30 +1204,23 @@ class wpdb {
                        return false;
                }
 
-               if ( preg_match( '/^\s*(create|alter|truncate|drop) /i', $query ) ) {
+               if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) {
                        $return_val = $this->result;
-               } elseif ( preg_match( '/^\s*(insert|delete|update|replace) /i', $query ) ) {
+               } elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) {
                        $this->rows_affected = mysql_affected_rows( $this->dbh );
                        // Take note of the insert_id
-                       if ( preg_match( '/^\s*(insert|replace) /i', $query ) ) {
+                       if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
                                $this->insert_id = mysql_insert_id($this->dbh);
                        }
                        // Return number of rows affected
                        $return_val = $this->rows_affected;
                } else {
-                       $i = 0;
-                       while ( $i < @mysql_num_fields( $this->result ) ) {
-                               $this->col_info[$i] = @mysql_fetch_field( $this->result );
-                               $i++;
-                       }
                        $num_rows = 0;
                        while ( $row = @mysql_fetch_object( $this->result ) ) {
                                $this->last_result[$num_rows] = $row;
                                $num_rows++;
                        }
 
-                       @mysql_free_result( $this->result );
-
                        // Log number of rows the query returned
                        // and return number of rows selected
                        $this->num_rows = $num_rows;
@@ -1455,6 +1548,22 @@ class wpdb {
                return null;
        }
 
+       /**
+        * Load the column metadata from the last query.
+        *
+        * @since 3.5.0
+        *
+        * @access protected
+        */
+       protected function load_col_info() {
+               if ( $this->col_info )
+                       return;
+
+               for ( $i = 0; $i < @mysql_num_fields( $this->result ); $i++ ) {
+                       $this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i );
+               }
+       }
+
        /**
         * Retrieve column metadata from the last query.
         *
@@ -1465,6 +1574,8 @@ class wpdb {
         * @return mixed Column Results
         */
        function get_col_info( $info_type = 'name', $col_offset = -1 ) {
+               $this->load_col_info();
+
                if ( $this->col_info ) {
                        if ( $col_offset == -1 ) {
                                $i = 0;
@@ -1506,7 +1617,7 @@ class wpdb {
        /**
         * Wraps errors in a nice header and footer and dies.
         *
-        * Will not die if wpdb::$show_errors is true
+        * Will not die if wpdb::$show_errors is false.
         *
         * @since 1.5.0
         *
@@ -1547,13 +1658,34 @@ class wpdb {
         * Called when WordPress is generating the table scheme.
         *
         * @since 2.5.0
+        * @deprecated 3.5.0
+        * @deprecated Use wpdb::has_cap( 'collation' )
         *
         * @return bool True if collation is supported, false if version does not
         */
        function supports_collation() {
+               _deprecated_function( __FUNCTION__, '3.5', 'wpdb::has_cap( \'collation\' )' );
                return $this->has_cap( 'collation' );
        }
 
+       /**
+        * The database character collate.
+        *
+        * @since 3.5.0
+        *
+        * @return string The database character collate.
+        */
+       public function get_charset_collate() {
+               $charset_collate = '';
+
+               if ( ! empty( $this->charset ) )
+                       $charset_collate = "DEFAULT CHARACTER SET $this->charset";
+               if ( ! empty( $this->collate ) )
+                       $charset_collate .= " COLLATE $this->collate";
+
+               return $charset_collate;
+       }
+
        /**
         * Determine if a database supports a particular feature
         *