$export = new CsvExport();
$export->setHeader(array('ids','username','age'));

$export->append(
    array(
        array('id'=>1,'username'=>'Michael','age'=>25),
        array('id'=>2,'username'=>'Han','age'=>24)
    )
);
$export->append(
    array(
        array('id'=>3,'username'=>'Mike','age'=>25),
    ),true
);
$export->export('user.csv')

$import = new CsvImport();
$import->setFile('read.csv',500,"\t");
print_r($import->getRows());
print_r($import->getHeader());