prepare($sql); if( ! (is_object($query) || is_resource($query))) { $this->get_last_error(); return FALSE; } // Set the statement in the class variable for easy later access $this->statement =& $query; if( ! (is_array($data) || is_object($data))) { trigger_error("Invalid data argument"); return FALSE; } // Bind the parameters foreach($data as $k => $value) { if(is_numeric($k)) { $k++; } $res = $query->bindValue($k, $value); if( ! $res) { trigger_error("Parameter not successfully bound"); return FALSE; } } return $query; } // ------------------------------------------------------------------------- /** * Create and execute a prepared statement with the provided parameters * * @param string $sql * @param array $params * @return PDOStatement */ public function prepare_execute($sql, $params) { $this->statement = $this->prepare_query($sql, $params); $this->statement->execute(); return $this->statement; } // ------------------------------------------------------------------------- /** * Retreives the data from a select query * * @param PDOStatement $statement * @return array */ public function get_query_data($statement) { $this->statement =& $statement; // Execute the query $this->statement->execute(); // Return the data array fetched return $this->statement->fetchAll(PDO::FETCH_ASSOC); } // ------------------------------------------------------------------------- /** * Returns number of rows affected by an INSERT, UPDATE, DELETE type query * * @param PDOStatement $statement * @return int */ public function affected_rows($statement='') { if ( ! empty($statement)) { $this->statement = $statement; } if (empty($this->statement)) { return FALSE; } // Return number of rows affected return $this->statement->rowCount(); } // -------------------------------------------------------------------------- /** * Return the last error for the current database connection * * @return string */ public function get_last_error() { $info = $this->errorInfo(); echo "Error:

{$info[0]}:{$info[1]}\n{$info[2]}

"; } // -------------------------------------------------------------------------- /** * Surrounds the string with the databases identifier escape characters * * @param mixed $ident * @return string */ public function quote_ident($ident) { if (is_array($ident)) { return array_map(array($this, 'quote_ident'), $ident); } // Split each identifier by the period $hiers = explode('.', $ident); return '"'.implode('"."', $hiers).'"'; } // ------------------------------------------------------------------------- /** * Deletes all the rows from a table. Does the same as the truncate * method if the database does not support 'TRUNCATE'; * * @param string $table * @return mixed */ public function empty_table($table) { $sql = 'DELETE FROM '.$this->quote_ident($table); return $this->query($sql); } // ------------------------------------------------------------------------- /** * Abstract public functions to override in child classes */ /** * Return list of tables for the current database * * @return array */ abstract public function get_tables(); /** * Empty the passed table * * @param string $table * * @return void */ abstract public function truncate($table); /** * Return the number of rows for the last SELECT query * * @return int */ abstract public function num_rows(); /** * Retreives an array of non-user-created tables for * the connection/database * * @return array */ abstract public function get_system_tables(); /** * Return an SQL file with the database table structure * * @return string */ abstract public function backup_structure(); /** * Return an SQL file with the database data as insert statements * * @return string */ abstract public function backup_data(); } // ------------------------------------------------------------------------- /** * Abstract parent for database manipulation subclasses */ abstract class DB_SQL { /** * Get database-specific sql to create a new table * * @param string $name * @param array $columns * @param array $constraints * @param array $indexes * @return string */ abstract public function create_table($name, $columns, array $constraints=array(), array $indexes=array()); /** * Get database-specific sql to drop a table * * @param string $name * @return string */ abstract public function delete_table($name); /** * Get database specific sql for limit clause * * @param string $sql * @param int $limiit * @param int $offset * @return string */ abstract public function limit($sql, $limit, $offset=FALSE); /** * Get the sql for random ordering * * @return string */ abstract public function random(); } // End of db_pdo.php