mysqli.php

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<?php
class DbMySQLi extends DbBase implements DbBaseInterface
{

    public $id_connection;
    public $last_result_query;
    protected $last_query;
    public $last_error;

    const DB_ASSOC = MYSQLI_ASSOC;

    const DB_BOTH = MYSQLI_BOTH;

    const DB_NUM = MYSQLI_NUM;


    const TYPE_INTEGER = 'INTEGER';

    const TYPE_DATE = 'DATE';

    const TYPE_VARCHAR = 'VARCHAR';

    const TYPE_DECIMAL = 'DECIMAL';

    const TYPE_DATETIME = 'DATETIME';

    const TYPE_CHAR = 'CHAR';

    public function connect($config)
    {
        if (!extension_loaded('mysqli')) throw new KumbiaException('Debe cargar la extensión de PHP llamada php_mysqli');

        $this->id_connection = new mysqli($config['host'], $config['username'], $config['password'], $config['name'], $config['port']);
        //no se usa $object->error() ya que solo funciona a partir de 5.2.9 y 5.3
        if (mysqli_connect_error ()) throw new KumbiaException(mysqli_connect_error());
        //Selecciona charset
        if (isset($config['charset'])) $this->id_connection->set_charset($config['charset']);
        return TRUE;
    }

    public function query($sql_query)
    {
        $this->debug($sql_query);
        if ($this->logger) {
            Logger::debug($sql_query);
        }
        
        $this->last_query = $sql_query;
        if ($result_query = mysqli_query($this->id_connection, $sql_query)) {
            $this->last_result_query = $result_query;
            return $result_query;
        } else {
            throw new KumbiaException($this->error(" al ejecutar <em>\"$sql_query\"</em>"));
        }
    }

    public function close()
    {
        if ($this->id_connection) {
            return mysqli_close($this->id_connection);
        }
    }

    public function fetch_array($result_query='', $opt=MYSQLI_BOTH)
    {
        if (!$result_query) {
            $result_query = $this->last_result_query;
            if (!$result_query) {
                return false;
            }
        }
        return mysqli_fetch_array($result_query, $opt);
    }

    public function __construct($config)
    {
        $this->connect($config);
    }

    public function num_rows($result_query='')
    {
        if (!$result_query) {
            $result_query = $this->last_result_query;
            if (!$result_query) {
                return false;
            }
        }
        if (($number_rows = mysqli_num_rows($result_query)) !== false) {
            return $number_rows;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    public function field_name($number, $result_query='')
    {

        if (!$result_query) {
            $result_query = $this->last_result_query;
            if (!$result_query) {
                return false;
            }
        }
        if (($fieldName = mysqli_field_seek($result_query, $number)) !== false) {
            $field = mysqli_fetch_field($result_query);
            return $field->name;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    public function data_seek($number, $result_query='')
    {
        if (!$result_query) {
            $result_query = $this->last_result_query;
            if (!$result_query) {
                return false;
            }
        }
        if (($success = mysqli_data_seek($result_query, $number)) !== false) {
            return $success;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    public function affected_rows($result_query='')
    {
        if (($numberRows = mysqli_affected_rows($this->id_connection)) !== false) {
            return $numberRows;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    public function error($err='')
    {
        $this->last_error = mysqli_error($this->id_connection) ? mysqli_error($this->id_connection) : "[Error Desconocido en MySQL: $err]";
        $this->last_error.= $err;
        if ($this->logger) {
            Logger::error($this->last_error);
        }
        return $this->last_error;
    }

    public function no_error()
    {
        return mysqli_errno($this->id_connection);
    }

    public function last_insert_id($table='', $primary_key='')
    {
        return mysqli_insert_id($this->id_connection);
    }

    public function table_exists($table, $schema='')
    {
        $table = addslashes("$table");
        if ($schema == '') {
            $num = $this->fetch_one("select count(*) from information_schema.tables where table_name = '$table'");
        } else {
            $schema = addslashes("$schema");
            $num = $this->fetch_one("select count(*) from information_schema.tables where table_name = '$table' and table_schema = '$schema'");
        }
        return $num[0];
    }

    public function limit($sql)
    {
        $params = Util::getParams(func_get_args());
        $sql_new = $sql;

        if (isset($params['limit']) && is_numeric($params['limit'])) {
            $sql_new.=" LIMIT $params[limit]";
        }

        if (isset($params['offset']) && is_numeric($params['offset'])) {
            $sql_new.=" OFFSET $params[offset]";
        }

        return $sql_new;
    }

    public function drop_table($table, $if_exists=true)
    {
        if ($if_exists) {
            return $this->query("DROP TABLE IF EXISTS $table");
        } else {
            return $this->query("DROP TABLE $table");
        }
    }

    public function create_table($table, $definition, $index=array())
    {
        $create_sql = "CREATE TABLE $table (";
        if (!is_array($definition)) {
            throw new KumbiaException("Definición invalida para crear la tabla '$table'");
        }
        $create_lines = array();
        $index = array();
        $unique_index = array();
        $primary = array();
        //$not_null = "";
        //$size = "";
        foreach ($definition as $field => $field_def) {
            if (isset($field_def['not_null'])) {
                $not_null = $field_def['not_null'] ? 'NOT NULL' : '';
            } else {
                $not_null = "";
            }
            if (isset($field_def['size'])) {
                $size = $field_def['size'] ? '(' . $field_def['size'] . ')' : '';
            } else {
                $size = "";
            }
            if (isset($field_def['index'])) {
                if ($field_def['index']) {
                    $index[] = "INDEX(`$field`)";
                }
            }
            if (isset($field_def['unique_index'])) {
                if ($field_def['unique_index']) {
                    $index[] = "UNIQUE(`$field`)";
                }
            }
            if (isset($field_def['primary'])) {
                if ($field_def['primary']) {
                    $primary[] = "`$field`";
                }
            }
            if (isset($field_def['auto'])) {
                if ($field_def['auto']) {
                    $field_def['extra'] = isset($field_def['extra']) ? $field_def['extra'] . " AUTO_INCREMENT" : "AUTO_INCREMENT";
                }
            }
            if (isset($field_def['extra'])) {
                $extra = $field_def['extra'];
            } else {
                $extra = "";
            }
            $create_lines[] = "`$field` " . $field_def['type'] . $size . ' ' . $not_null . ' ' . $extra;
        }
        $create_sql.= join(',', $create_lines);
        $last_lines = array();
        if (count($primary)) {
            $last_lines[] = 'PRIMARY KEY(' . join(",", $primary) . ')';
        }
        if (count($index)) {
            $last_lines[] = join(',', $index);
        }
        if (count($unique_index)) {
            $last_lines[] = join(',', $unique_index);
        }
        if (count($last_lines)) {
            $create_sql.= ',' . join(',', $last_lines) . ')';
        }
        return $this->query($create_sql);
    }

    public function list_tables()
    {
        return $this->fetch_all("SHOW TABLES");
    }

    public function describe_table($table, $schema='')
    {
        if ($schema == '') {
            return $this->fetch_all("DESCRIBE `$table`");
        } else {
            return $this->fetch_all("DESCRIBE `$schema`.`$table`");
        }
    }

    public function last_sql_query()
    {
        return $this->last_query;
    }

}