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- <?php
- /* For licensing terms, see /license.txt */
- /**
- * This is the main database library for Chamilo.
- * Include/require it in your code to use its functionality.
- * Because this library contains all the basic database calls, it could be
- * replaced by another library for say, PostgreSQL, to actually use Chamilo
- * with another database (this is not ready yet because a lot of code still
- * uses the MySQL database functions extensively).
- *
- * If trying to replicate the database layer, don't forget to look for "sql"
- * named functions in main_api.lib.php
- *
- * @package chamilo.library
- */
- /**
- * Constants definition
- */
- require_once 'database.constants.inc.php';
- /**
- * Database class definition
- * @package chamilo.database
- */
- class Database
- {
- /* Variable use only in the installation process to log errors. See the Database::query function */
- static $log_queries = false;
- /*
- Accessor methods
- Usually, you won't need these directly but instead
- rely on of the get_xxx_table methods.
- */
- /**
- * Returns the name of the main database.
- */
- public static function get_main_database()
- {
- global $_configuration;
- return $_configuration['main_database'];
- }
- /**
- * Returns the name of the statistics database.
- * @todo use main_database
- */
- public static function get_statistic_database()
- {
- return self::get_main_database();
- }
- /**
- * Returns the name of the database where all the personal stuff of the user is stored
- * @todo use main_database
- */
- public static function get_user_personal_database()
- {
- return self::get_main_database();
- }
- /**
- * Returns the name of the current course database.
- * @return mixed Glued database name of false if undefined
- */
- public static function get_current_course_database()
- {
- $course_info = api_get_course_info();
- if (empty($course_info['dbName'])) {
- return false;
- }
- return $course_info['dbName'];
- }
- /**
- * Returns the glued name of the current course database.
- * @return mixed Glued database name of false if undefined
- */
- public static function get_current_course_glued_database()
- {
- $course_info = api_get_course_info();
- if (empty($course_info['dbNameGlu'])) {
- return false;
- }
- return $course_info['dbNameGlu'];
- }
- /**
- * The glue is the string needed between database and table.
- * The trick is: in multiple databases, this is a period (with backticks).
- * In single database, this can be e.g. an underscore so we just fake
- * there are multiple databases and the code can be written independent
- * of the single / multiple database setting.
- */
- public static function get_database_glue()
- {
- global $_configuration;
- return $_configuration['db_glue'];
- }
- /**
- * Returns the database prefix.
- * All created COURSE databases are prefixed with this string.
- *
- * TIP: This can be convenient if you have multiple system installations
- * on the same physical server.
- */
- public static function get_database_name_prefix()
- {
- global $_configuration;
- return $_configuration['db_prefix'];
- }
- /**
- * Returns the course table prefix for single database.
- * Not certain exactly when this is used.
- * Do research.
- * It's used in local.inc.php.
- */
- public static function get_course_table_prefix()
- {
- global $_configuration;
- return $_configuration['table_prefix'];
- }
- /*
- Table name methods
- Use these methods to get table names for queries,
- instead of constructing them yourself.
- Backticks automatically surround the result,
- e.g. COURSE_NAME.link
- so the queries can look cleaner.
- Example:
- $table = Database::get_course_table(TABLE_DOCUMENT);
- $sql_query = "SELECT * FROM $table WHERE $condition";
- $sql_result = Database::query($sql_query);
- $result = Database::fetch_array($sql_result);
- */
- /**
- * A more generic method than the other get_main_xxx_table methods,
- * This one returns the correct complete name of any table of the main
- * database of which you pass the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_main_table($short_table_name)
- {
- return self::format_table_name(
- self::get_main_database(),
- $short_table_name);
- }
- /**
- * A more generic method than the older get_course_xxx_table methods,
- * This one can return the correct complete name of any course table of
- * which you pass the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- * @param string $database_name, optional, name of the course database
- * - if you don't specify this, you work on the current course.
- */
- public static function get_course_table($short_table_name, $extra = null) {
- //forces fatal errors so we can debug more easily
- if (!empty($extra)) {
- var_dump($extra);
- //@todo remove this
- echo "<h3>Dev Message: get_course_table() doesn't have a 2nd parameter</h3>";
- //exit;
- }
- return self::format_table_name(self::get_main_database(), DB_COURSE_PREFIX.$short_table_name);
- //return self::format_glued_course_table_name(self::fix_database_parameter($database_name), $short_table_name);
- }
- /**
- * This generic method returns the correct and complete name of any
- * statistic table of which you pass the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_statistic_table($short_table_name)
- {
- return self::get_main_table($short_table_name);
- }
- /**
- * This generic method returns the correct and complete name of any user
- * table of which you pass the short name as a parameter. Please, define
- * table names as constants in this library and use them instead of directly
- * using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_user_personal_table($short_table_name)
- {
- return self::get_main_table($short_table_name);
- }
- public static function get_course_chat_connected_table($database_name = '')
- {
- return self::format_glued_course_table_name(self::fix_database_parameter($database_name), TABLE_CHAT_CONNECTED);
- }
- /*
- Query methods
- These methods execute a query and return the result(s).
- */
- /**
- * @return a list (array) of all courses.
- * @todo shouldn't this be in the course.lib.php script?
- */
- public static function get_course_list()
- {
- $table = self::get_main_table(TABLE_MAIN_COURSE);
- return self::store_result(self::query("SELECT *, id as real_id FROM $table"));
- }
- /**
- * Returns an array with all database fields for the specified course.
- *
- * @param string The real (system) course code (main course table ID)
- * @todo shouldn't this be in the course.lib.php script?
- */
- public static function get_course_info($course_code)
- {
- $course_code = self::escape_string($course_code);
- $table = self::get_main_table(TABLE_MAIN_COURSE);
- $result = self::generate_abstract_course_field_names(
- self::fetch_array(self::query("SELECT *, id as real_id FROM $table WHERE code = '$course_code'")));
- return $result === false ? array('db_name' => '') : $result;
- }
- /**
- * Gets user details from the "user" table
- * @param $user_id (integer): the id of the user
- * @return $user_info (array): user_id, lname, fname, username, email, ...
- * @author Patrick Cool <patrick.cool@UGent.be>, expanded to get info for any user
- * @author Roan Embrechts, first version + converted to Database API
- * @version 30 September 2004
- * @deprecated use api_get_user_info();
- * @desc find all the information about a specified user. Without parameter this is the current user.
- * @todo shouldn't this be in the user.lib.php script?
- */
- public static function get_user_info_from_id($user_id = '')
- {
- if (empty($user_id)) {
- return $GLOBALS['_user'];
- }
- $table = self::get_main_table(TABLE_MAIN_USER);
- $user_id = self::escape_string($user_id);
- return self::generate_abstract_user_field_names(
- self::fetch_array(self::query("SELECT * FROM $table WHERE user_id = '$user_id'")));
- }
- /**
- * Returns course code from a given gradebook category's id
- * @param int Category ID
- * @return string Course code
- * @todo move this function in a gradebook-related library
- */
- public static function get_course_by_category($category_id)
- {
- $category_id = intval($category_id);
- $info = self::fetch_array(self::query('SELECT course_code FROM '.self::get_main_table(TABLE_MAIN_GRADEBOOK_CATEGORY).' WHERE id='.$category_id), 'ASSOC');
- return $info ? $info['course_code'] : false;
- }
- /**
- * This method creates an abstraction layer between database field names
- * and field names expected in code.
- *
- * This approach helps when changing database names.
- * It's also useful now to get rid of the 'franglais'.
- *
- * @todo add more array entries to abstract course info from field names
- * @author Roan Embrechts
- *
- * @todo What's the use of this method. I think this is better removed.
- * There should be consistency in the variable names and the
- * use throughout the scripts
- * for the database name we should consistently use or db_name
- * or database (db_name probably being the better one)
- */
- public static function generate_abstract_course_field_names($result_array)
- {
- $visual_code = isset($result_array['visual_code']) ? $result_array['visual_code'] : null;
- $code = isset($result_array['code']) ? $result_array['code'] : null;
- $title = isset($result_array['title']) ? $result_array['title'] : null;
- $db_name = isset($result_array['db_name']) ? $result_array['db_name'] : null;
- $category_code = isset($result_array['category_code']) ? $result_array['category_code'] : null;
- $result_array['official_code'] = $visual_code;
- $result_array['visual_code'] = $visual_code;
- $result_array['real_code'] = $code;
- $result_array['system_code'] = $code;
- $result_array['title'] = $title;
- $result_array['database'] = $db_name;
- $result_array['faculty'] = $category_code;
- //$result_array['directory'] = $result_array['directory'];
- /*
- still to do: (info taken from local.inc.php)
- $_course['id' ] = $cData['cours_id' ]; //auto-assigned integer
- $_course['name' ] = $cData['title' ];
- $_course['official_code'] = $cData['visual_code' ]; // use in echo
- $_course['sysCode' ] = $cData['code' ]; // use as key in db
- $_course['path' ] = $cData['directory' ]; // use as key in path
- $_course['dbName' ] = $cData['db_name' ]; // use as key in db list
- $_course['dbNameGlu' ] = $_configuration['table_prefix'] . $cData['dbName'] . $_configuration['db_glue']; // use in all queries
- $_course['titular' ] = $cData['tutor_name' ];
- $_course['language' ] = $cData['course_language' ];
- $_course['extLink' ]['url' ] = $cData['department_url' ];
- $_course['extLink' ]['name'] = $cData['department_name'];
- $_course['categoryCode'] = $cData['faCode' ];
- $_course['categoryName'] = $cData['faName' ];
- $_course['visibility' ] = (bool) ($cData['visibility'] == 2 || $cData['visibility'] == 3);
- $_course['registrationAllowed'] = (bool) ($cData['visibility'] == 1 || $cData['visibility'] == 2);
- */
- return $result_array;
- }
- /**
- * This method creates an abstraction layer between database field names
- * and field names expected in code.
- *
- * This helps when changing database names.
- * It's also useful now to get rid of the 'franglais'.
- *
- * @todo add more array entries to abstract user info from field names
- * @author Roan Embrechts
- * @author Patrick Cool
- *
- * @todo what's the use of this function. I think this is better removed.
- * There should be consistency in the variable names and the use throughout the scripts
- */
- public static function generate_abstract_user_field_names($result_array) {
- $result_array['firstName'] = $result_array['firstname'];
- $result_array['lastName'] = $result_array['lastname'];
- $result_array['mail'] = $result_array['email'];
- #$result_array['picture_uri'] = $result_array['picture_uri'];
- #$result_array ['user_id'] = $result_array['user_id'];
- return $result_array;
- }
- /**
- * Counts the number of rows in a table
- * @param string $table The table of which the rows should be counted
- * @return int The number of rows in the given table.
- * @deprecated
- */
- public static function count_rows($table) {
- $obj = self::fetch_object(self::query("SELECT COUNT(*) AS n FROM $table")); //
- return $obj->n;
- }
- /*
- An intermediate API-layer between the system and the database server.
- */
- /**
- * Returns the number of affected rows in the last database operation.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int Returns the number of affected rows on success, and -1 if the last query failed.
- */
- public static function affected_rows($connection = null) {
- return self::use_default_connection($connection) ? mysql_affected_rows() : mysql_affected_rows($connection);
- }
- /**
- * Closes non-persistent database connection.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return bool Returns TRUE on success or FALSE on failure.
- */
- public static function close($connection = null) {
- return self::use_default_connection($connection) ? mysql_close() : mysql_close($connection);
- }
- /**
- * Opens a connection to a database server.
- * @param array $parameters (optional) An array that contains the necessary parameters for accessing the server.
- * @return resource/boolean Returns a database connection on success or FALSE on failure.
- * Note: Currently the array could contain MySQL-specific parameters:
- * $parameters['server'], $parameters['username'], $parameters['password'],
- * $parameters['new_link'], $parameters['client_flags'], $parameters['persistent'].
- * For details see documentation about the functions mysql_connect() and mysql_pconnect().
- * @link http://php.net/manual/en/function.mysql-connect.php
- * @link http://php.net/manual/en/function.mysql-pconnect.php
- */
- public static function connect($parameters = array()) {
- // A MySQL-specific implementation.
- if (!isset($parameters['server'])) {
- $parameters['server'] = @ini_get('mysql.default_host');
- if (empty($parameters['server'])) {
- $parameters['server'] = 'localhost:3306';
- }
- }
- if (!isset($parameters['username'])) {
- $parameters['username'] = @ini_get('mysql.default_user');
- }
- if (!isset($parameters['password'])) {
- $parameters['password'] = @ini_get('mysql.default_password');
- }
- if (!isset($parameters['new_link'])) {
- $parameters['new_link'] = false;
- }
- if (!isset($parameters['client_flags'])) {
- $parameters['client_flags'] = 0;
- }
- $persistent = isset($parameters['persistent']) ? $parameters['persistent'] : null;
- $server = isset($parameters['server']) ? $parameters['server'] : null;
- $username = isset($parameters['username']) ? $parameters['username'] : null;
- $password = isset($parameters['password']) ? $parameters['password'] : null;
- $client_flag = isset($parameters['client_flags']) ? $parameters['client_flags'] : null;
- $new_link = isset($parameters['new_link']) ? $parameters['new_link'] : null;
- $client_flags = isset($parameters['client_flags']) ? $parameters['client_flags'] : null;
- return $persistent
- ? mysql_pconnect($server, $username, $password, $client_flags)
- : mysql_connect($server, $username, $password, $new_link, $client_flags);
- }
- /**
- * Returns error number from the last operation done on the database server.
- * @param resource $connection (optional) The database server connection,
- * for detailed description see the method query().
- * @return int Returns the error number from the last database (operation, or 0 (zero) if no error occurred.
- */
- public static function errno($connection = null) {
- return self::use_default_connection($connection) ? mysql_errno() : mysql_errno($connection);
- }
- /**
- * Returns error text from the last operation done on the database server.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string Returns the error text from the last database operation, or '' (empty string) if no error occurred.
- */
- public static function error($connection = null) {
- return self::use_default_connection($connection) ? mysql_error() : mysql_error($connection);
- }
- /**
- * Escape MySQL wildchars _ and % in LIKE search
- * @param string The string to escape
- * @return string The escaped string
- */
- public static function escape_sql_wildcards($in_txt) {
- $out_txt = api_preg_replace("/_/", "\_", $in_txt);
- $out_txt = api_preg_replace("/%/", "\%", $out_txt);
- return $out_txt;
- }
- /**
- * Escapes a string to insert into the database as text
- * @param string The string to escape
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string The escaped string
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
- */
- public static function escape_string($string, $connection = null) {
- return get_magic_quotes_gpc()
- ? (self::use_default_connection($connection)
- ? mysql_real_escape_string(stripslashes($string))
- : mysql_real_escape_string(stripslashes($string), $connection))
- : (self::use_default_connection($connection)
- ? mysql_real_escape_string($string)
- : mysql_real_escape_string($string, $connection));
- }
- /**
- * Gets the array from a SQL result (as returned by Database::query) - help achieving database independence
- * @param resource The result from a call to sql_query (e.g. Database::query)
- * @param string Optional: "ASSOC","NUM" or "BOTH", as the constant used in mysql_fetch_array.
- * @return array Array of results as returned by php
- * @author Yannick Warnier <yannick.warnier@beeznest.com>
- */
- public static function fetch_array($result, $option = 'BOTH') {
- if ($result === false) { return array(); }
- return $option == 'ASSOC' ? mysql_fetch_array($result, MYSQL_ASSOC) : ($option == 'NUM' ? mysql_fetch_array($result, MYSQL_NUM) : mysql_fetch_array($result));
- }
- /**
- * Gets an associative array from a SQL result (as returned by Database::query).
- * This method is equivalent to calling Database::fetch_array() with 'ASSOC' value for the optional second parameter.
- * @param resource $result The result from a call to sql_query (e.g. Database::query).
- * @return array Returns an associative array that corresponds to the fetched row and moves the internal data pointer ahead.
- */
- public static function fetch_assoc($result) {
- return mysql_fetch_assoc($result);
- }
- /**
- * Gets the next row of the result of the SQL query (as returned by Database::query) in an object form
- * @param resource The result from a call to sql_query (e.g. Database::query)
- * @param string Optional class name to instanciate
- * @param array Optional array of parameters
- * @return object Object of class StdClass or the required class, containing the query result row
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- */
- public static function fetch_object($result, $class = null, $params = null) {
- return !empty($class) ? (is_array($params) ? mysql_fetch_object($result, $class, $params) : mysql_fetch_object($result, $class)) : mysql_fetch_object($result);
- }
- /**
- * Gets the array from a SQL result (as returned by Database::query) - help achieving database independence
- * @param resource The result from a call to sql_query (see Database::query()).
- * @return array Array of results as returned by php (mysql_fetch_row)
- */
- public static function fetch_row($result) {
- return mysql_fetch_row($result);
- }
- /**
- * Frees all the memory associated with the provided result identifier.
- * @return bool Returns TRUE on success or FALSE on failure.
- * Notes: Use this method if you are concerned about how much memory is being used for queries that return large result sets.
- * Anyway, all associated result memory is automatically freed at the end of the script's execution.
- */
- public static function free_result($result) {
- return mysql_free_result($result);
- }
- /**
- * Returns the database client library version.
- * @return strung Returns a string that represents the client library version.
- */
- public static function get_client_info() {
- return mysql_get_client_info();
- }
- /**
- * Returns a list of databases created on the server. The list may contain all of the
- * available database names or filtered database names by using a pattern.
- * @param string $pattern (optional) A pattern for filtering database names as if it was needed for the SQL's LIKE clause, for example 'chamilo_%'.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of database names.
- */
- public static function get_databases($pattern = '', $connection = null) {
- $result = array();
- $query_result = Database::query(!empty($pattern) ? "SHOW DATABASES LIKE '".self::escape_string($pattern, $connection)."'" : "SHOW DATABASES", $connection);
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- return $result;
- }
- /**
- * Returns a list of the fields that a given table contains. The list may contain all of the available field names or filtered field names by using a pattern.
- * By using a special option, this method is able to return an indexed list of fields' properties, where field names are keys.
- * @param string $table This is the examined table.
- * @param string $pattern (optional) A pattern for filtering field names as if it was needed for the SQL's LIKE clause, for example 'column_%'.
- * @param string $database (optional) The name of the targeted database. If it is omited, the current database is assumed, see Database::select_db().
- * @param bool $including_properties (optional) When this option is true, the returned result has the followong format:
- * array(field_name_1 => array(0 => property_1, 1 => property_2, ...), fieald_name_2 => array(0 => property_1, ...), ...)
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of field names.
- */
- public static function get_fields($table, $pattern = '', $database = '', $including_properties = false, $connection = null) {
- $result = array();
- $query = "SHOW COLUMNS FROM `".self::escape_string($table, $connection)."`";
- if (!empty($database)) {
- $query .= " FROM `".self::escape_string($database, $connection)."`";
- }
- if (!empty($pattern)) {
- $query .= " LIKE '".self::escape_string($pattern, $connection)."'";
- }
- $query_result = Database::query($query, $connection);
- if ($including_properties) {
- // Making an indexed list of the fields and their properties.
- while ($row = Database::fetch_row($query_result)) {
- $result[$row[0]] = $row;
- }
- } else {
- // Making a plain, flat list.
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- }
- return $result;
- }
- /**
- * Returns information about the type of the current connection and the server host name.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string/boolean Returns string data on success or FALSE on failure.
- */
- public static function get_host_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_host_info() : mysql_get_host_info($connection);
- }
- /**
- * Retrieves database client/server protocol version.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int/boolean Returns the protocol version on success or FALSE on failure.
- */
- public static function get_proto_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_proto_info() : mysql_get_proto_info($connection);
- }
- /**
- * Retrieves the database server version.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string/boolean Returns the MySQL server version on success or FALSE on failure.
- */
- public static function get_server_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_server_info() : mysql_get_server_info($connection);
- }
- /**
- * Returns a list of tables within a database. The list may contain all of the
- * available table names or filtered table names by using a pattern.
- * @param string $database (optional) The name of the examined database. If it is omited, the current database is assumed, see Database::select_db().
- * @param string $pattern (optional) A pattern for filtering table names as if it was needed for the SQL's LIKE clause, for example 'access_%'.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of table names.
- */
- public static function get_tables($database = '', $pattern = '', $connection = null) {
- $result = array();
- $query = "SHOW TABLES";
- if (!empty($database)) {
- $query .= " FROM `".self::escape_string($database, $connection)."`";
- }
- if (!empty($pattern)) {
- $query .= " LIKE '".self::escape_string($pattern, $connection)."'";
- }
- $query_result = Database::query($query, $connection);
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- return $result;
- }
- /**
- * Gets the ID of the last item inserted into the database
- * This should be updated to use ADODB at some point
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int The last ID as returned by the DB function
- */
- public static function insert_id($connection = null) {
- return self::use_default_connection($connection) ? mysql_insert_id() : mysql_insert_id($connection);
- }
- /**
- * Gets the number of rows from the last query result - help achieving database independence
- * @param resource The result
- * @return integer The number of rows contained in this result
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- **/
- public static function num_rows($result) {
- return is_resource($result) ? mysql_num_rows($result) : false;
- }
- /**
- * Acts as the relative *_result() function of most DB drivers and fetches a
- * specific line and a field
- * @param resource The database resource to get data from
- * @param integer The row number
- * @param string Optional field name or number
- * @return mixed One cell of the result, or FALSE on error
- */
- public static function result($resource, $row, $field = '') {
- return self::num_rows($resource) > 0 ? (!empty($field) ? mysql_result($resource, $row, $field) : mysql_result($resource, $row)) : null;
- }
- /**
- * This method returns a resource
- * Documentation has been added by Arthur Portugal
- * Some adaptations have been implemented by Ivan Tcholakov, 2009, 2010
- * @author Olivier Brouckaert
- * @param string $query The SQL query
- * @param resource $connection (optional) The database server (MySQL) connection.
- * If it is not specified, the connection opened by mysql_connect() is assumed.
- * If no connection is found, the server will try to create one as if mysql_connect() was called with no arguments.
- * If no connection is found or established, an E_WARNING level error is generated.
- * @param string $file (optional) On error it shows the file in which the error has been trigerred (use the "magic" constant __FILE__ as input parameter)
- * @param string $line (optional) On error it shows the line in which the error has been trigerred (use the "magic" constant __LINE__ as input parameter)
- * @return resource The returned result from the query
- * Note: The parameter $connection could be skipped. Here are examples of this method usage:
- * Database::query($query);
- * $result = Database::query($query);
- * Database::query($query, $connection);
- * $result = Database::query($query, $connection);
- * The following ways for calling this method are obsolete:
- * Database::query($query, __FILE__, __LINE__);
- * $result = Database::query($query, __FILE__, __LINE__);
- * Database::query($query, $connection, __FILE__, __LINE__);
- * $result = Database::query($query, $connection, __FILE__, __LINE__);
- */
- public static function query($query, $connection = null, $file = null, $line = null) {
- $use_default_connection = self::use_default_connection($connection);
- if ($use_default_connection) {
- // Let us do parameter shifting, thus the method would be similar
- // (in regard to parameter order) to the original function mysql_query().
- $line = $file;
- $file = $connection;
- $connection = null;
- }
- //@todo remove this before the stable release
- //Check if the table contains a c_ (means a course id)
- if (api_get_setting('server_type')==='test' && strpos($query, 'c_')) {
- //Check if the table contains inner joins
- if (
- strpos($query, 'assoc_handle') === false &&
- strpos($query, 'olpc_peru_filter') === false &&
- strpos($query, 'allow_public_certificates') === false &&
- strpos($query, 'DROP TABLE IF EXISTS') === false &&
- strpos($query, 'thematic_advance') === false &&
- strpos($query, 'thematic_plan') === false &&
- strpos($query, 'track_c_countries') === false &&
- strpos($query, 'track_c_os') === false &&
- strpos($query, 'track_c_providers') === false &&
- strpos($query, 'track_c_referers') === false &&
- strpos($query, 'track_c_browsers') === false &&
- strpos($query, 'settings_current') === false &&
- strpos($query, 'dokeos_classic_2D') === false &&
- strpos($query, 'cosmic_campus') === false &&
- strpos($query, 'static_') === false &&
- strpos($query, 'public_admin') === false &&
- strpos($query, 'chamilo_electric_blue') === false &&
- strpos($query, 'wcag_anysurfer_public_pages') === false &&
- strpos($query, 'specific_field') === false &&
- strpos($query, 'down_doc_path') === false &&
- strpos($query, 'INNER JOIN') === false &&
- strpos($query, 'inner join') === false &&
- strpos($query, 'left join') === false &&
- strpos($query, 'LEFT JOIN') === false &&
- strpos($query, 'insert') === false &&
- strpos($query, 'INSERT') === false &&
- strpos($query, 'ALTER') === false &&
- strpos($query, 'alter') === false &&
- strpos($query, 'c_id') === false &&
- strpos($query, 'create table') === false &&
- strpos($query, 'CREATE TABLE') === false &&
- strpos($query, 'AUTO_INCREMENT') === false
- ) {
- //@todo remove this
- echo '<pre>';
- $message = '<h4>Dev message: please add the c_id field in this query or report this error in support.chamilo.org </h4>';
- $message .= $query;
- echo $message;
- echo '</pre>';
- //error_log($message);
- }
- }
- if (!($result = $use_default_connection ? mysql_query($query) : mysql_query($query, $connection))) {
- $backtrace = debug_backtrace(); // Retrieving information about the caller statement.
- if (isset($backtrace[0])) {
- $caller = & $backtrace[0];
- } else {
- $caller = array();
- }
- if (isset($backtrace[1])) {
- $owner = & $backtrace[1];
- } else {
- $owner = array();
- }
- if (empty($file)) {
- $file = $caller['file'];
- }
- if (empty($line) && $line !== false) {
- $line = $caller['line'];
- }
- $type = isset($owner['type']) ? $owner['type'] : null;
- $function = $owner['function'];
- $class = isset($owner['class']) ? $owner['class'] : null;
- $server_type = api_get_setting('server_type');
- if (!empty($line) && !empty($server_type) && $server_type != 'production') {
- $info = '<pre>' .
- '<strong>DATABASE ERROR #'.self::errno($connection).':</strong><br /> ' .
- self::remove_XSS(self::error($connection)) . '<br />' .
- '<strong>QUERY :</strong><br /> ' .
- self::remove_XSS($query) . '<br />' .
- '<strong>FILE :</strong><br /> ' .
- (empty($file) ? ' unknown ' : $file) . '<br />' .
- '<strong>LINE :</strong><br /> ' .
- (empty($line) ? ' unknown ' : $line) . '<br />';
- if (empty($type)) {
- if (!empty($function)) {
- $info .= '<strong>FUNCTION :</strong><br /> ' . $function;
- }
- } else {
- if (!empty($class) && !empty($function)) {
- $info .= '<strong>CLASS :</strong><br /> ' . $class . '<br />';
- $info .= '<strong>METHOD :</strong><br /> ' . $function;
- }
- }
- $info .= '</pre>';
- echo $info;
- }
- if (isset(self::$log_queries) && self::$log_queries) {
- error_log("---------------- SQL error ---------------- ");
- error_log($query);
- error_log('error #'.self::errno($connection));
- error_log('error: '.self::error($connection));
- $info = 'FILE: ' .(empty($file) ? ' unknown ' : $file);
- $info .= ' +'.(empty($line) ? ' unknown ' : $line);
- error_log($info);
- if (empty($type)) {
- if (!empty($function)) {
- $info = 'FUNCTION: ' . $function;
- error_log($info);
- }
- } else {
- if (!empty($class) && !empty($function)) {
- $info = 'CLASS: ' . $class.' METHOD: '.$function;
- error_log($info);
- }
- }
- error_log("---------------- end ----------------");
- }
- }
- return $result;
- }
- /**
- * Selects a database.
- * @param string $database_name The name of the database that is to be selected.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return bool Returns TRUE on success or FALSE on failure.
- */
- public static function select_db($database_name, $connection = null) {
- return self::use_default_connection($connection) ? mysql_select_db($database_name) : mysql_select_db($database_name, $connection);
- }
- /**
- * Stores a query result into an array.
- *
- * @author Olivier Brouckaert
- * @param resource $result - the return value of the query
- * @param option BOTH, ASSOC, or NUM
- * @return array - the value returned by the query
- */
- public static function store_result($result, $option = 'BOTH') {
- $array = array();
- if ($result !== false) { // For isolation from database engine's behaviour.
- while ($row = self::fetch_array($result, $option)) {
- $array[] = $row;
- }
- }
- return $array;
- }
- /*
- Encodings and collations supported by MySQL database server
- */
- /**
- * Checks whether a given encoding is supported by the database server.
- * @param string $encoding The encoding (a system conventional id, for example 'UTF-8') to be checked.
- * @return bool Returns a boolean value as a check-result.
- * @author Ivan Tcholakov
- */
- public static function is_encoding_supported($encoding) {
- static $supported = array();
- if (!isset($supported[$encoding])) {
- $supported[$encoding] = false;
- if (strlen($db_encoding = self::to_db_encoding($encoding)) > 0) {
- if (self::num_rows(self::query("SHOW CHARACTER SET WHERE Charset = '".self::escape_string($db_encoding)."';")) > 0) {
- $supported[$encoding] = true;
- }
- }
- }
- return $supported[$encoding];
- }
- /**
- * Constructs a SQL clause about default character set and default collation for newly created databases and tables.
- * Example: Database::make_charset_clause('UTF-8', 'bulgarian') returns
- * DEFAULT CHARACTER SET `utf8` DEFAULT COLLATE `utf8_general_ci`
- * @param string $encoding (optional) The default database/table encoding (a system conventional id) to be used.
- * @param string $language (optional) Language (a system conventional id) used for choosing language sensitive collation (if it is possible).
- * @return string Returns the constructed SQL clause or empty string if $encoding is not correct or is not supported.
- * @author Ivan Tcholakov
- */
- public static function make_charset_clause($encoding = null, $language = null) {
- if (empty($encoding)) {
- $encoding = api_get_system_encoding();
- }
- if (empty($language)) {
- $language = api_get_interface_language();
- }
- $charset_clause = '';
- if (self::is_encoding_supported($encoding)) {
- $db_encoding = Database::to_db_encoding($encoding);
- $charset_clause .= " DEFAULT CHARACTER SET `".$db_encoding."`";
- $db_collation = Database::to_db_collation($encoding, $language);
- if (!empty($db_collation)) {
- $charset_clause .= " DEFAULT COLLATE `".$db_collation."`";
- }
- }
- return $charset_clause;
- }
- /**
- * Converts an encoding identificator to MySQL-specific encoding identifictor,
- * i.e. 'UTF-8' --> 'utf8'.
- * @param string $encoding The conventional encoding identificator.
- * @return string Returns the corresponding MySQL-specific encoding identificator if any, otherwise returns NULL.
- * @author Ivan Tcholakov
- */
- public static function to_db_encoding($encoding) {
- static $result = array();
- if (!isset($result[$encoding])) {
- $result[$encoding] = null;
- $encoding_map = & self::get_db_encoding_map();
- foreach ($encoding_map as $key => $value) {
- if (api_equal_encodings($encoding, $key)) {
- $result[$encoding] = $value;
- break;
- }
- }
- }
- return $result[$encoding];
- }
- /**
- * Converts a MySQL-specific encoding identifictor to conventional encoding identificator,
- * i.e. 'utf8' --> 'UTF-8'.
- * @param string $encoding The MySQL-specific encoding identificator.
- * @return string Returns the corresponding conventional encoding identificator if any, otherwise returns NULL.
- * @author Ivan Tcholakov
- */
- public static function from_db_encoding($db_encoding) {
- static $result = array();
- if (!isset($result[$db_encoding])) {
- $result[$db_encoding] = null;
- $encoding_map = & self::get_db_encoding_map();
- foreach ($encoding_map as $key => $value) {
- if (strtolower($db_encoding) == $value) {
- $result[$db_encoding] = $key;
- break;
- }
- }
- }
- return $result[$db_encoding];
- }
- /**
- * Chooses the default MySQL-specific collation from given encoding and language.
- * @param string $encoding A conventional encoding id, i.e. 'UTF-8'
- * @param string $language (optional) A conventional for the system language id, i.e. 'bulgarian'. If it is empty, the chosen collation is the default server value corresponding to the given encoding.
- * @return string Returns a suitable default collation, for example 'utf8_general_ci', or NULL if collation was not found.
- * @author Ivan Tcholakov
- */
- public static function to_db_collation($encoding, $language = null) {
- static $result = array();
- if (!isset($result[$encoding][$language])) {
- $result[$encoding][$language] = null;
- if (self::is_encoding_supported($encoding)) {
- $db_encoding = self::to_db_encoding($encoding);
- if (!empty($language)) {
- $lang = api_purify_language_id($language);
- $res = self::check_db_collation($db_encoding, $lang);
- if (empty($res)) {
- $db_collation_map = & self::get_db_collation_map();
- if (isset($db_collation_map[$lang])) {
- $res = self::check_db_collation($db_encoding, $db_collation_map[$lang]);
- }
- }
- if (empty($res)) {
- $res = self::check_db_collation($db_encoding, null);
- }
- $result[$encoding][$language] = $res;
- } else {
- $result[$encoding][$language] = self::check_db_collation($db_encoding, null);
- }
- }
- }
- return $result[$encoding][$language];
- }
- /*
- Private methods
- You should not access these from outside the class
- No effort is made to keep the names / results the same.
- */
- /**
- * Glues a course database.
- * glue format from local.inc.php.
- */
- private static function glue_course_database_name($database_name) {
- return self::get_course_table_prefix().$database_name.self::get_database_glue();
- }
- /**
- * @param string $database_name, can be empty to use current course db
- *
- * @return the glued parameter if it is not empty,
- * or the current course database (glued) if the parameter is empty.
- */
- private static function fix_database_parameter($database_name) {
- if (empty($database_name)) {
- $course_info = api_get_course_info();
- return $course_info['dbNameGlu'];
- }
- return self::glue_course_database_name($database_name);
- }
- /**
- * Structures a course database and table name to ready them
- * for querying. The course database parameter is considered glued:
- * e.g. COURSE001`.`
- */
- private static function format_glued_course_table_name($database_name_with_glue, $table) {
- return '`'.$database_name_with_glue.$table.'`';
- }
- /**
- * Structures a database and table name to ready them
- * for querying. The database parameter is considered not glued,
- * just plain e.g. COURSE001
- */
- private static function format_table_name($database, $table) {
- global $_configuration;
- if ($_configuration['single_database']) {
- $table_name = '`'.$database.'`.`'.$table.'`';
- } else {
- $table_name = '`'.$database.$_configuration['db_glue'].$table.'`';
- }
- return $table_name;
- }
- /**
- * This private method is to be used by the other methods in this class for
- * checking whether the input parameter $connection actually has been provided.
- * If the input parameter connection is not a resource or if it is not FALSE (in case of error)
- * then the default opened connection should be used by the called method.
- * @param resource/boolean $connection The checked parameter $connection.
- * @return boolean TRUE means that calling method should use the default connection.
- * FALSE means that (valid) parameter $connection has been provided and it should be used.
- */
- private static function use_default_connection($connection) {
- return !is_resource($connection) && $connection !== false;
- }
- /**
- * This private method tackles the XSS injections. It is similar to Security::remove_XSS() and works always,
- * including the time of initialization when the class Security has not been loaded yet.
- * @param string The input variable to be filtered from XSS, in this class it is expected to be a string.
- * @return string Returns the filtered string as a result.
- */
- private static function remove_XSS(& $var) {
- return class_exists('Security') ? Security::remove_XSS($var) : @htmlspecialchars($var, ENT_QUOTES, api_get_system_encoding());
- }
- /**
- * This private method encapsulates a table with relations between
- * conventional and MuSQL-specific encoding identificators.
- * @author Ivan Tcholakov
- */
- private static function & get_db_encoding_map() {
- static $encoding_map = array(
- 'ARMSCII-8' => 'armscii8',
- 'BIG5' => 'big5',
- 'BINARY' => 'binary',
- 'CP866' => 'cp866',
- 'EUC-JP' => 'ujis',
- 'EUC-KR' => 'euckr',
- 'GB2312' => 'gb2312',
- 'GBK' => 'gbk',
- 'ISO-8859-1' => 'latin1',
- 'ISO-8859-2' => 'latin2',
- 'ISO-8859-7' => 'greek',
- 'ISO-8859-8' => 'hebrew',
- 'ISO-8859-9' => 'latin5',
- 'ISO-8859-13' => 'latin7',
- 'ISO-8859-15' => 'latin1',
- 'KOI8-R' => 'koi8r',
- 'KOI8-U' => 'koi8u',
- 'SHIFT-JIS' => 'sjis',
- 'TIS-620' => 'tis620',
- 'US-ASCII' => 'ascii',
- 'UTF-8' => 'utf8',
- 'WINDOWS-1250' => 'cp1250',
- 'WINDOWS-1251' => 'cp1251',
- 'WINDOWS-1252' => 'latin1',
- 'WINDOWS-1256' => 'cp1256',
- 'WINDOWS-1257' => 'cp1257'
- );
- return $encoding_map;
- }
- /**
- * A helper language id translation table for choosing some collations.
- * @author Ivan Tcholakov
- */
- private static function & get_db_collation_map() {
- static $db_collation_map = array(
- 'german' => 'german2',
- 'simpl_chinese' => 'chinese',
- 'trad_chinese' => 'chinese',
- 'turkce' => 'turkish'
- );
- return $db_collation_map;
- }
- /**
- * Constructs a MySQL-specific collation and checks whether it is supported by the database server.
- * @param string $db_encoding A MySQL-specific encoding id, i.e. 'utf8'
- * @param string $language A MySQL-compatible language id, i.e. 'bulgarian'
- * @return string Returns a suitable default collation, for example 'utf8_general_ci', or NULL if collation was not found.
- * @author Ivan Tcholakov
- */
- private static function check_db_collation($db_encoding, $language) {
- if (empty($db_encoding)) {
- return null;
- }
- if (empty($language)) {
- $result = self::fetch_array(self::query("SHOW COLLATION WHERE Charset = '".self::escape_string($db_encoding)."' AND `Default` = 'Yes';"), 'NUM');
- return $result ? $result[0] : null;
- }
- $collation = $db_encoding.'_'.$language.'_ci';
- $query_result = self::query("SHOW COLLATION WHERE Charset = '".self::escape_string($db_encoding)."';");
- while ($result = self::fetch_array($query_result, 'NUM')) {
- if ($result[0] == $collation) {
- return $collation;
- }
- }
- return null;
- }
- /*
- New useful DB functions
- */
- /**
- * Experimental useful database insert
- * @todo lot of stuff to do here
- */
- public static function insert($table_name, $attributes, $show_query = false)
- {
- if (empty($attributes) || empty($table_name)) {
- return false;
- }
- $filtred_attributes = array();
- foreach($attributes as $key => $value) {
- $filtred_attributes[$key] = "'".self::escape_string($value)."'";
- }
- //@todo check if the field exists in the table we should use a describe of that table
- $params = array_keys($filtred_attributes);
- $values = array_values($filtred_attributes);
- if (!empty($params) && !empty($values)) {
- $sql = 'INSERT INTO '.$table_name.' ('.implode(',',$params).') VALUES ('.implode(',',$values).')';
- self::query($sql);
- if ($show_query) {
- var_dump($sql);
- }
- return self::insert_id();
- }
- return false;
- }
- /**
- * Experimental useful database finder
- * @todo lot of stuff to do here
- * @todo known issues, it doesn't work when using LIKE conditions
- * @example array('where'=> array('course_code LIKE "?%"'))
- * @example array('where'=> array('type = ? AND category = ?' => array('setting', 'Plugins'))
- * @example array('where'=> array('name = "Julio" AND lastname = "montoya"'))
- */
- public static function select($columns, $table_name, $conditions = array(), $type_result = 'all', $option = 'ASSOC')
- {
- $conditions = self::parse_conditions($conditions);
- //@todo we could do a describe here to check the columns ...
- $clean_columns = '';
- if (is_array($columns)) {
- $clean_columns = implode(',', $columns);
- } else {
- if ($columns == '*') {
- $clean_columns = '*';
- } else {
- $clean_columns = (string)$columns;
- }
- }
- $sql = "SELECT $clean_columns FROM $table_name $conditions";
- $result = self::query($sql);
- $array = array();
- //if (self::num_rows($result) > 0 ) {
- if ($type_result == 'all') {
- while ($row = self::fetch_array($result, $option)) {
- if (isset($row['id'])) {
- $array[$row['id']] = $row;
- } else {
- $array[] = $row;
- }
- }
- } else {
- $array = self::fetch_array($result, $option);
- }
- return $array;
- }
- /**
- * Parses WHERE/ORDER conditions i.e array('where'=>array('id = ?' =>'4'), 'order'=>'id DESC'))
- * @todo known issues, it doesn't work when using LIKE conditions example: array('where'=>array('course_code LIKE "?%"'))
- * @param array
- * @todo lot of stuff to do here
- */
- static function parse_conditions($conditions) {
- if (empty($conditions)) {
- return '';
- }
- $return_value = $where_return = '';
- foreach ($conditions as $type_condition => $condition_data) {
- if ($condition_data == false) {
- continue;
- }
- $type_condition = strtolower($type_condition);
- switch ($type_condition) {
- case 'where':
- foreach ($condition_data as $condition => $value_array) {
- if (is_array($value_array)) {
- $clean_values = array();
- foreach($value_array as $item) {
- $item = Database::escape_string($item);
- $clean_values[]= $item;
- }
- } else {
- $value_array = Database::escape_string($value_array);
- $clean_values = $value_array;
- }
- if (!empty($condition) && $clean_values != '') {
- $condition = str_replace('%',"'@percentage@'", $condition); //replace "%"
- $condition = str_replace("'?'","%s", $condition);
- $condition = str_replace("?","%s", $condition);
- $condition = str_replace("@%s@","@-@", $condition);
- $condition = str_replace("%s","'%s'", $condition);
- $condition = str_replace("@-@","@%s@", $condition);
- //Treat conditons as string
- $condition = vsprintf($condition, $clean_values);
- $condition = str_replace('@percentage@','%', $condition); //replace "%"
- $where_return .= $condition;
- }
- }
- if (!empty($where_return)) {
- $return_value = " WHERE $where_return" ;
- }
- break;
- case 'order':
- $order_array = $condition_data;
- if (!empty($order_array)) {
- // 'order' => 'id desc, name desc'
- $order_array = self::escape_string($order_array);
- $new_order_array = explode(',', $order_array);
- $temp_value = array();
- foreach($new_order_array as $element) {
- $element = explode(' ', $element);
- $element = array_filter($element);
- $element = array_values($element);
- if (!empty($element[1])) {
- $element[1] = strtolower($element[1]);
- $order = 'DESC';
- if (in_array($element[1], array('desc', 'asc'))) {
- $order = $element[1];
- }
- $temp_value[]= $element[0].' '.$order.' ';
- } else {
- //by default DESC
- $temp_value[]= $element[0].' DESC ';
- }
- }
- if (!empty($temp_value)) {
- $return_value .= ' ORDER BY '.implode(', ', $temp_value);
- } else {
- //$return_value .= '';
- }
- }
- break;
- case 'limit':
- $limit_array = explode(',', $condition_data);
- if (!empty($limit_array)) {
- if (count($limit_array) > 1) {
- $return_value .= ' LIMIT '.intval($limit_array[0]).' , '.intval($limit_array[1]);
- } else {
- $return_value .= ' LIMIT '.intval($limit_array[0]);
- }
- }
- break;
- }
- }
- return $return_value;
- }
- public static function parse_where_conditions($coditions) {
- return self::parse_conditions(array('where'=>$coditions));
- }
- /**
- * Experimental useful database update
- * @todo lot of stuff to do here
- */
- public static function delete($table_name, $where_conditions, $show_query = false) {
- $result = false;
- $where_return = self::parse_where_conditions($where_conditions);
- $sql = "DELETE FROM $table_name $where_return ";
- if ($show_query) { echo $sql; echo '<br />'; }
- $result = self::query($sql);
- $affected_rows = self::affected_rows();
- //@todo should return affected_rows for
- return $affected_rows;
- }
- /**
- * Experimental useful database update
- * @param string table name use Database::get_main_table
- * @param array array with values to updates, keys are the fields in the database: Example: $params['name'] = 'Julio'; $params['lastname'] = 'Montoya';
- * @param array where conditions i.e array('id = ?' =>'4')
- * @todo lot of stuff to do here
- */
- public static function update($table_name, $attributes, $where_conditions = array(), $show_query = false) {
- if (!empty($table_name) && !empty($attributes)) {
- $update_sql = '';
- //Cleaning attributes
- $count = 1;
- foreach ($attributes as $key=>$value) {
- if (!is_array($value))
- $value = self::escape_string($value);
- $update_sql .= "$key = '$value' ";
- if ($count < count($attributes)) {
- $update_sql.=', ';
- }
- $count++;
- }
- if (!empty($update_sql)) {
- //Parsing and cleaning the where conditions
- $where_return = self::parse_where_conditions($where_conditions);
- $sql = "UPDATE $table_name SET $update_sql $where_return ";
- if ($show_query) { var_dump($sql); }
- $result = self::query($sql);
- $affected_rows = self::affected_rows();
- return $affected_rows;
- }
- }
- return false;
- }
- /*
- DEPRECATED METHODS
- */
- /**
- * @deprecated Use api_get_language_isocode($language) instead.
- */
- public static function get_language_isocode($language) {
- return api_get_language_isocode($language);
- }
- /**
- * @deprecated Use Database::insert_id() instead.
- */
- public static function get_last_insert_id() {
- return mysql_insert_id();
- }
- }
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