preparedQuery * * @var mysqli_stmt */ protected $lastStatement = null; /** * Store the most recent statement for later use * * @param mysqli_stmt $statement */ protected function setLastStatement($statement) { $this->lastStatement = $statement; } /** * Retrieve a prepared statement for a given SQL string * * @param string $sql * @param boolean &$success * @return mysqli_stmt */ public function prepareStatement($sql, &$success) { // Record last statement for error reporting $statement = $this->dbConn->stmt_init(); $this->setLastStatement($statement); $success = $statement->prepare($sql); return $statement; } public function connect($parameters, $selectDB = false) { // Normally $selectDB is set to false by the MySQLDatabase controller, as per convention $selectedDB = ($selectDB && !empty($parameters['database'])) ? $parameters['database'] : null; // Connection charset and collation $connCharset = Config::inst()->get('MySQLDatabase', 'connection_charset'); $connCollation = Config::inst()->get('MySQLDatabase', 'connection_collation'); if(!empty($parameters['port'])) { $this->dbConn = new MySQLi( $parameters['server'], $parameters['username'], $parameters['password'], $selectedDB, $parameters['port'] ); } else { $this->dbConn = new MySQLi( $parameters['server'], $parameters['username'], $parameters['password'], $selectedDB ); } if ($this->dbConn->connect_error) { $this->databaseError("Couldn't connect to MySQL database | " . $this->dbConn->connect_error); } // Set charset and collation if given and not null. Can explicitly set to empty string to omit $charset = isset($parameters['charset']) ? $parameters['charset'] : $connCharset; if (!empty($charset)) $this->dbConn->set_charset($charset); $collation = isset($parameters['collation']) ? $parameters['collation'] : $connCollation; if (!empty($collation)) $this->dbConn->query("SET collation_connection = {$collation}"); } public function __destruct() { if ($this->dbConn) { mysqli_close($this->dbConn); $this->dbConn = null; } } public function escapeString($value) { return $this->dbConn->real_escape_string($value); } public function quoteString($value) { $value = $this->escapeString($value); return "'$value'"; } public function getVersion() { return $this->dbConn->server_info; } /** * Invoked before any query is executed * * @param string $sql */ protected function beforeQuery($sql) { // Clear the last statement $this->setLastStatement(null); } public function query($sql, $errorLevel = E_USER_ERROR) { $this->beforeQuery($sql); // Benchmark query $handle = $this->dbConn->query($sql, MYSQLI_STORE_RESULT); if (!$handle || $this->dbConn->error) { $this->databaseError($this->getLastError(), $errorLevel, $sql); return null; } // Some non-select queries return true on success return new MySQLQuery($this, $handle); } /** * Prepares the list of parameters in preparation for passing to mysqli_stmt_bind_param * * @param array $parameters List of parameters * @param array &$blobs Out parameter for list of blobs to bind separately * @return array List of parameters appropriate for mysqli_stmt_bind_param function */ public function parsePreparedParameters($parameters, &$blobs) { $types = ''; $values = array(); $blobs = array(); for($index = 0; $index < count($parameters); $index++) { $value = $parameters[$index]; $phpType = gettype($value); // Allow overriding of parameter type using an associative array if($phpType === 'array') { $phpType = $value['type']; $value = $value['value']; } // Convert php variable type to one that makes mysqli_stmt_bind_param happy // @see http://www.php.net/manual/en/mysqli-stmt.bind-param.php switch($phpType) { case 'boolean': case 'integer': $types .= 'i'; break; case 'float': // Not actually returnable from gettype case 'double': $types .= 'd'; break; case 'object': // Allowed if the object or resource has a __toString method case 'resource': case 'string': case 'NULL': // Take care that a where clause should use "where XX is null" not "where XX = null" $types .= 's'; break; case 'blob': $types .= 'b'; // Blobs must be sent via send_long_data and set to null here $blobs[] = array( 'index' => $index, 'value' => $value ); $value = null; break; case 'array': case 'unknown type': default: user_error("Cannot bind parameter \"$value\" as it is an unsupported type ($phpType)", E_USER_ERROR); break; } $values[] = $value; } return array_merge(array($types), $values); } /** * Binds a list of parameters to a statement * * @param mysqli_stmt $statement MySQLi statement * @param array $parameters List of parameters to pass to bind_param */ public function bindParameters(mysqli_stmt $statement, array $parameters) { // Because mysqli_stmt::bind_param arguments must be passed by reference // we need to do a bit of hackery for ($i = 0; $i < count($parameters); $i++) { $boundName = "param$i"; $$boundName = $parameters[$i]; $boundNames[] = &$$boundName; } call_user_func_array( array($statement, 'bind_param'), $boundNames); } public function preparedQuery($sql, $parameters, $errorLevel = E_USER_ERROR) { // Shortcut to basic query when not given parameters if(empty($parameters)) { return $this->query($sql, $errorLevel); } $this->beforeQuery($sql); // Type check, identify, and prepare parameters for passing to the statement bind function $parsedParameters = $this->parsePreparedParameters($parameters, $blobs); // Benchmark query $statement = $this->prepareStatement($sql, $success); if($success) { if($parsedParameters) { $this->bindParameters($statement, $parsedParameters); } // Bind any blobs given foreach($blobs as $blob) { $statement->send_long_data($blob['index'], $blob['value']); } // Safely execute the statement $statement->execute(); } if (!$success || $statement->error) { $values = $this->parameterValues($parameters); $this->databaseError($this->getLastError(), $errorLevel, $sql, $values); return null; } // Non-select queries will have no result data $metaData = $statement->result_metadata(); if($metaData) { return new MySQLStatement($statement, $metaData); } else { // Replicate normal behaviour of ->query() on non-select calls return new MySQLQuery($this, true); } } public function selectDatabase($name) { if ($this->dbConn->select_db($name)) { $this->databaseName = $name; return true; } else { return false; } } public function getSelectedDatabase() { return $this->databaseName; } public function unloadDatabase() { $this->databaseName = null; } public function isActive() { return $this->databaseName && $this->dbConn && empty($this->dbConn->connect_error); } public function affectedRows() { return $this->dbConn->affected_rows; } public function getGeneratedID($table) { return $this->dbConn->insert_id; } public function getLastError() { // Check if a statement was used for the most recent query if($this->lastStatement && $this->lastStatement->error) { return $this->lastStatement->error; } return $this->dbConn->error; } }