--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/database.mysqli.inc	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,374 @@
+<?php
+// $Id: database.mysqli.inc,v 1.54 2008/01/23 09:59:29 goba Exp $
+
+/**
+ * @file
+ * Database interface code for MySQL database servers using the mysqli client libraries. mysqli is included in PHP 5 by default and allows developers to use the advanced features of MySQL 4.1.x, 5.0.x and beyond.
+ */
+
+ // Maintainers of this file should consult:
+ // http://www.php.net/manual/en/ref.mysqli.php
+
+/**
+ * @ingroup database
+ * @{
+ */
+
+// Include functions shared between mysql and mysqli.
+require_once './includes/database.mysql-common.inc';
+
+/**
+ * Report database status.
+ */
+function db_status_report($phase) {
+  $t = get_t();
+
+  $version = db_version();
+
+  $form['mysql'] = array(
+    'title' => $t('MySQL database'),
+    'value' => ($phase == 'runtime') ? l($version, 'admin/reports/status/sql') : $version,
+  );
+
+  if (version_compare($version, DRUPAL_MINIMUM_MYSQL) < 0) {
+    $form['mysql']['severity'] = REQUIREMENT_ERROR;
+    $form['mysql']['description'] = $t('Your MySQL Server is too old. Drupal requires at least MySQL %version.', array('%version' => DRUPAL_MINIMUM_MYSQL));
+  }
+
+  return $form;
+}
+
+/**
+ * Returns the version of the database server currently in use.
+ *
+ * @return Database server version
+ */
+function db_version() {
+  global $active_db;
+  list($version) = explode('-', mysqli_get_server_info($active_db));
+  return $version;
+}
+
+/**
+ * Initialise a database connection.
+ *
+ * Note that mysqli does not support persistent connections.
+ */
+function db_connect($url) {
+  // Check if MySQLi support is present in PHP
+  if (!function_exists('mysqli_init') && !extension_loaded('mysqli')) {
+    _db_error_page('Unable to use the MySQLi database because the MySQLi extension for PHP is not installed. Check your <code>php.ini</code> to see how you can enable it.');
+  }
+
+  $url = parse_url($url);
+
+  // Decode url-encoded information in the db connection string
+  $url['user'] = urldecode($url['user']);
+  // Test if database url has a password.
+  $url['pass'] = isset($url['pass']) ? urldecode($url['pass']) : '';
+  $url['host'] = urldecode($url['host']);
+  $url['path'] = urldecode($url['path']);
+  if (!isset($url['port'])) {
+    $url['port'] = NULL;
+  }
+
+  $connection = mysqli_init();
+  @mysqli_real_connect($connection, $url['host'], $url['user'], $url['pass'], substr($url['path'], 1), $url['port'], NULL, MYSQLI_CLIENT_FOUND_ROWS);
+
+  if (mysqli_connect_errno() > 0) {
+    _db_error_page(mysqli_connect_error());
+  }
+
+  // Force UTF-8.
+  mysqli_query($connection, 'SET NAMES "utf8"');
+
+  return $connection;
+}
+
+/**
+ * Helper function for db_query().
+ */
+function _db_query($query, $debug = 0) {
+  global $active_db, $queries, $user;
+
+  if (variable_get('dev_query', 0)) {
+    list($usec, $sec) = explode(' ', microtime());
+    $timer = (float)$usec + (float)$sec;
+    // If devel.module query logging is enabled, prepend a comment with the username and calling function
+    // to the SQL string. This is useful when running mysql's SHOW PROCESSLIST to learn what exact
+    // code is issueing the slow query.
+    $bt = debug_backtrace();
+    // t() may not be available yet so we don't wrap 'Anonymous'
+    $name = $user->uid ? $user->name : variable_get('anonymous', 'Anonymous');
+    // str_replace() to prevent SQL injection via username or anonymous name.
+    $name = str_replace(array('*', '/'), '', $name);
+    $query = '/* '. $name .' : '. $bt[2]['function'] .' */ '. $query;
+  }
+
+  $result = mysqli_query($active_db, $query);
+
+  if (variable_get('dev_query', 0)) {
+    $query = $bt[2]['function'] ."\n". $query;
+    list($usec, $sec) = explode(' ', microtime());
+    $stop = (float)$usec + (float)$sec;
+    $diff = $stop - $timer;
+    $queries[] = array($query, $diff);
+  }
+
+  if ($debug) {
+    print '<p>query: '. $query .'<br />error:'. mysqli_error($active_db) .'</p>';
+  }
+
+  if (!mysqli_errno($active_db)) {
+    return $result;
+  }
+  else {
+    // Indicate to drupal_error_handler that this is a database error.
+    ${DB_ERROR} = TRUE;
+    trigger_error(check_plain(mysqli_error($active_db) ."\nquery: ". $query), E_USER_WARNING);
+    return FALSE;
+  }
+}
+
+/**
+ * Fetch one result row from the previous query as an object.
+ *
+ * @param $result
+ *   A database query result resource, as returned from db_query().
+ * @return
+ *   An object representing the next row of the result, or FALSE. The attributes
+ *   of this object are the table fields selected by the query.
+ */
+function db_fetch_object($result) {
+  if ($result) {
+    $object = mysqli_fetch_object($result);
+    return isset($object) ? $object : FALSE;
+  }
+}
+
+/**
+ * Fetch one result row from the previous query as an array.
+ *
+ * @param $result
+ *   A database query result resource, as returned from db_query().
+ * @return
+ *   An associative array representing the next row of the result, or FALSE.
+ *   The keys of this object are the names of the table fields selected by the
+ *   query, and the values are the field values for this result row.
+ */
+function db_fetch_array($result) {
+  if ($result) {
+    $array = mysqli_fetch_array($result, MYSQLI_ASSOC);
+    return isset($array) ? $array : FALSE;
+  }
+}
+
+/**
+ * Return an individual result field from the previous query.
+ *
+ * Only use this function if exactly one field is being selected; otherwise,
+ * use db_fetch_object() or db_fetch_array().
+ *
+ * @param $result
+ *   A database query result resource, as returned from db_query().
+ * @return
+ *   The resulting field or FALSE.
+ */
+function db_result($result) {
+  if ($result && mysqli_num_rows($result) > 0) {
+    // The mysqli_fetch_row function has an optional second parameter $row
+    // but that can't be used for compatibility with Oracle, DB2, etc.
+    $array = mysqli_fetch_row($result);
+    return $array[0];
+  }
+  return FALSE;
+}
+
+/**
+ * Determine whether the previous query caused an error.
+ */
+function db_error() {
+  global $active_db;
+  return mysqli_errno($active_db);
+}
+
+/**
+ * Determine the number of rows changed by the preceding query.
+ */
+function db_affected_rows() {
+  global $active_db; /* mysqli connection resource */
+  return mysqli_affected_rows($active_db);
+}
+
+/**
+ * Runs a limited-range query in the active database.
+ *
+ * Use this as a substitute for db_query() when a subset of the query is to be
+ * returned.
+ * User-supplied arguments to the query should be passed in as separate parameters
+ * so that they can be properly escaped to avoid SQL injection attacks.
+ *
+ * @param $query
+ *   A string containing an SQL query.
+ * @param ...
+ *   A variable number of arguments which are substituted into the query
+ *   using printf() syntax. The query arguments can be enclosed in one
+ *   array instead.
+ *   Valid %-modifiers are: %s, %d, %f, %b (binary data, do not enclose
+ *   in '') and %%.
+ *
+ *   NOTE: using this syntax will cast NULL and FALSE values to decimal 0,
+ *   and TRUE values to decimal 1.
+ *
+ * @param $from
+ *   The first result row to return.
+ * @param $count
+ *   The maximum number of result rows to return.
+ * @return
+ *   A database query result resource, or FALSE if the query was not executed
+ *   correctly.
+ */
+function db_query_range($query) {
+  $args = func_get_args();
+  $count = array_pop($args);
+  $from = array_pop($args);
+  array_shift($args);
+
+  $query = db_prefix_tables($query);
+  if (isset($args[0]) and is_array($args[0])) { // 'All arguments in one array' syntax
+    $args = $args[0];
+  }
+  _db_query_callback($args, TRUE);
+  $query = preg_replace_callback(DB_QUERY_REGEXP, '_db_query_callback', $query);
+  $query .= ' LIMIT '. (int)$from .', '. (int)$count;
+  return _db_query($query);
+}
+
+/**
+ * Runs a SELECT query and stores its results in a temporary table.
+ *
+ * Use this as a substitute for db_query() when the results need to stored
+ * in a temporary table. Temporary tables exist for the duration of the page
+ * request.
+ * User-supplied arguments to the query should be passed in as separate parameters
+ * so that they can be properly escaped to avoid SQL injection attacks.
+ *
+ * Note that if you need to know how many results were returned, you should do
+ * a SELECT COUNT(*) on the temporary table afterwards. db_affected_rows() does
+ * not give consistent result across different database types in this case.
+ *
+ * @param $query
+ *   A string containing a normal SELECT SQL query.
+ * @param ...
+ *   A variable number of arguments which are substituted into the query
+ *   using printf() syntax. The query arguments can be enclosed in one
+ *   array instead.
+ *   Valid %-modifiers are: %s, %d, %f, %b (binary data, do not enclose
+ *   in '') and %%.
+ *
+ *   NOTE: using this syntax will cast NULL and FALSE values to decimal 0,
+ *   and TRUE values to decimal 1.
+ *
+ * @param $table
+ *   The name of the temporary table to select into. This name will not be
+ *   prefixed as there is no risk of collision.
+ * @return
+ *   A database query result resource, or FALSE if the query was not executed
+ *   correctly.
+ */
+function db_query_temporary($query) {
+  $args = func_get_args();
+  $tablename = array_pop($args);
+  array_shift($args);
+
+  $query = preg_replace('/^SELECT/i', 'CREATE TEMPORARY TABLE '. $tablename .' Engine=HEAP SELECT', db_prefix_tables($query));
+  if (isset($args[0]) and is_array($args[0])) { // 'All arguments in one array' syntax
+    $args = $args[0];
+  }
+  _db_query_callback($args, TRUE);
+  $query = preg_replace_callback(DB_QUERY_REGEXP, '_db_query_callback', $query);
+  return _db_query($query);
+}
+
+/**
+ * Returns a properly formatted Binary Large Object value.
+ *
+ * @param $data
+ *   Data to encode.
+ * @return
+ *  Encoded data.
+ */
+function db_encode_blob($data) {
+  global $active_db;
+  return "'". mysqli_real_escape_string($active_db, $data) ."'";
+}
+
+/**
+ * Returns text from a Binary Large OBject value.
+ *
+ * @param $data
+ *   Data to decode.
+ * @return
+ *  Decoded data.
+ */
+function db_decode_blob($data) {
+  return $data;
+}
+
+/**
+ * Prepare user input for use in a database query, preventing SQL injection attacks.
+ */
+function db_escape_string($text) {
+  global $active_db;
+  return mysqli_real_escape_string($active_db, $text);
+}
+
+/**
+ * Lock a table.
+ */
+function db_lock_table($table) {
+  db_query('LOCK TABLES {'. db_escape_table($table) .'} WRITE');
+}
+
+/**
+ * Unlock all locked tables.
+ */
+function db_unlock_tables() {
+  db_query('UNLOCK TABLES');
+}
+
+/**
+ * Check if a table exists.
+ */
+function db_table_exists($table) {
+  return (bool) db_fetch_object(db_query("SHOW TABLES LIKE '{". db_escape_table($table) ."}'"));
+}
+
+/**
+ * Check if a column exists in the given table.
+ */
+function db_column_exists($table, $column) {
+  return (bool) db_fetch_object(db_query("SHOW COLUMNS FROM {". db_escape_table($table) ."} LIKE '". db_escape_table($column) ."'"));
+}
+
+/**
+ * Wraps the given table.field entry with a DISTINCT(). The wrapper is added to
+ * the SELECT list entry of the given query and the resulting query is returned.
+ * This function only applies the wrapper if a DISTINCT doesn't already exist in
+ * the query.
+ *
+ * @param $table Table containing the field to set as DISTINCT
+ * @param $field Field to set as DISTINCT
+ * @param $query Query to apply the wrapper to
+ * @return SQL query with the DISTINCT wrapper surrounding the given table.field.
+ */
+function db_distinct_field($table, $field, $query) {
+  $field_to_select = 'DISTINCT('. $table .'.'. $field .')';
+  // (?<!text) is a negative look-behind (no need to rewrite queries that already use DISTINCT).
+  return preg_replace('/(SELECT.*)(?:'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\('. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
+}
+
+/**
+ * @} End of "ingroup database".
+ */
+