hostname, $this->username, $this->password); } // -------------------------------------------------------------------- /** * Persistent database connection * * @access private called by the base class * @return resource */ function db_pconnect() { return $this->db_connect(); } // -------------------------------------------------------------------- /** * Select the database * * @access private called by the base class * @return resource */ function db_select() { return @mysqli_select_db($this->conn_id, $this->database); } // -------------------------------------------------------------------- /** * Execute the query * * @access private called by the base class * @param string an SQL query * @return resource */ function _execute($sql) { $sql = $this->_prep_query($sql); $result = @mysqli_query($this->conn_id, $sql); return $result; } // -------------------------------------------------------------------- /** * Prep the query * * If needed, each database adapter can prep the query string * * @access private called by execute() * @param string an SQL query * @return string */ function _prep_query($sql) { // "DELETE FROM TABLE" returns 0 affected rows This hack modifies // the query so that it returns the number of affected rows if ($this->delete_hack === TRUE) { if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql)) { $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql); } } return $sql; } // -------------------------------------------------------------------- /** * Begin Transaction * * @access public * @return bool */ function trans_begin($test_mode = FALSE) { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } // Reset the transaction failure flag. // If the $test_mode flag is set to TRUE transactions will be rolled back // even if the queries produce a successful result. $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE; $this->simple_query('SET AUTOCOMMIT=0'); $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK return TRUE; } // -------------------------------------------------------------------- /** * Commit Transaction * * @access public * @return bool */ function trans_commit() { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } $this->simple_query('COMMIT'); $this->simple_query('SET AUTOCOMMIT=1'); return TRUE; } // -------------------------------------------------------------------- /** * Rollback Transaction * * @access public * @return bool */ function trans_rollback() { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } $this->simple_query('ROLLBACK'); $this->simple_query('SET AUTOCOMMIT=1'); return TRUE; } // -------------------------------------------------------------------- /** * Escape String * * @access public * @param string * @return string */ function escape_str($str) { return mysqli_real_escape_string($this->conn_id, $str); } // -------------------------------------------------------------------- /** * Close DB Connection * * @access public * @param resource * @return void */ function destroy($conn_id) { mysqli_close($conn_id); } // -------------------------------------------------------------------- /** * Affected Rows * * @access public * @return integer */ function affected_rows() { return @mysqli_affected_rows($this->conn_id); } // -------------------------------------------------------------------- /** * Insert ID * * @access public * @return integer */ function insert_id() { return @mysqli_insert_id($this->conn_id); } // -------------------------------------------------------------------- /** * "Count All" query * * Generates a platform-specific query string that counts all records in * the specified database * * @access public * @param string * @return string */ function count_all($table = '') { if ($table == '') return '0'; $query = $this->query("SELECT COUNT(*) AS numrows FROM `".$this->dbprefix.$table."`"); if ($query->num_rows() == 0) return '0'; $row = $query->row(); return $row->numrows; } // -------------------------------------------------------------------- /** * The error message string * * @access public * @return string */ function error_message() { return mysqli_error($this->conn_id); } // -------------------------------------------------------------------- /** * The error message number * * @access public * @return integer */ function error_number() { return mysqli_errno($this->conn_id); } // -------------------------------------------------------------------- /** * Escape Table Name * * This function adds backticks if the table name has a period * in it. Some DBs will get cranky unless periods are escaped * * @access public * @param string the table name * @return string */ function escape_table($table) { if (stristr($table, '.')) { $table = preg_replace("/\./", "`.`", $table); } return $table; } // -------------------------------------------------------------------- /** * Field data query * * Generates a platform-specific query so that the column data can be retrieved * * @access public * @param string the table name * @return object */ function _field_data($table) { $sql = "SELECT * FROM ".$this->escape_table($table)." LIMIT 1"; $query = $this->query($sql); return $query->field_data(); } // -------------------------------------------------------------------- /** * Insert statement * * Generates a platform-specific insert string from the supplied data * * @access public * @param string the table name * @param array the insert keys * @param array the insert values * @return string */ function _insert($table, $keys, $values) { return "INSERT INTO ".$this->escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; } // -------------------------------------------------------------------- /** * Update statement * * Generates a platform-specific update string from the supplied data * * @access public * @param string the table name * @param array the update data * @param array the where clause * @return string */ function _update($table, $values, $where) { foreach($values as $key => $val) { $valstr[] = $key." = ".$val; } return "UPDATE ".$this->escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where); } // -------------------------------------------------------------------- /** * Delete statement * * Generates a platform-specific delete string from the supplied data * * @access public * @param string the table name * @param array the where clause * @return string */ function _delete($table, $where) { return "DELETE FROM ".$this->escape_table($table)." WHERE ".implode(" ", $where); } // -------------------------------------------------------------------- /** * Version number query string * * @access public * @return string */ function _version() { return "SELECT version() AS ver"; } // -------------------------------------------------------------------- /** * Show table query * * Generates a platform-specific query string so that the table names can be fetched * * @access public * @return string */ function _show_tables() { return "SHOW TABLES FROM `".$this->database."`"; } // -------------------------------------------------------------------- /** * Show columnn query * * Generates a platform-specific query string so that the column names can be fetched * * @access public * @param string the table name * @return string */ function _show_columns($table = '') { return "SHOW COLUMNS FROM ".$this->escape_table($table); } // -------------------------------------------------------------------- /** * Limit string * * Generates a platform-specific LIMIT clause * * @access public * @param string the sql query string * @param integer the number of rows to limit the query to * @param integer the offset value * @return string */ function _limit($sql, $limit, $offset) { $sql .= "LIMIT ".$limit; if ($offset > 0) { $sql .= " OFFSET ".$offset; } return $sql; } } /** * MySQLi Result Class * * This class extends the parent result class: CI_DB_result * * @category Database * @author Rick Ellis * @link http://www.codeigniter.com/user_guide/libraries/database/ */ class CI_DB_mysqli_result extends CI_DB_result { /** * Number of rows in the result set * * @access public * @return integer */ function num_rows() { return @mysqli_num_rows($this->result_id); } // -------------------------------------------------------------------- /** * Number of fields in the result set * * @access public * @return integer */ function num_fields() { return @mysqli_num_fields($this->result_id); } // -------------------------------------------------------------------- /** * Field data * * Generates an array of objects containing field meta-data * * @access public * @return array */ function field_data() { $retval = array(); while ($field = mysqli_fetch_field($this->result_id)) { $F = new stdClass(); $F->name = $field->name; $F->type = $field->type; $F->default = $field->def; $F->max_length = $field->max_length; $F->primary_key = ($field->flags & MYSQLI_PRI_KEY_FLAG) ? 1 : 0; $retval[] = $F; } return $retval; } // -------------------------------------------------------------------- /** * Result - associative array * * Returns the result set as an array * * @access private * @return array */ function _fetch_assoc() { return mysqli_fetch_assoc($this->result_id); } // -------------------------------------------------------------------- /** * Result - object * * Returns the result set as an object * * @access private * @return object */ function _fetch_object() { return mysqli_fetch_object($this->result_id); } } ?>