Ben indirdiğiniz PHPExcel 1.7.5 Production.

I discussed in their forum here olarak ve stackoverflow questions in setReadDataOnly() ve enableMemoryOptimization() kullanmak istiyorum.

Ben bunları kullanmak Ancak, ben bir Call to undefined method hatası alıyorum.

Is there another version or some plugin or library that I have not installed? What do I have to do to access these methods?

$objPHPExcel = PHPExcel_IOFactory::load("data/".$file_name);
$objPHPExcel->setReadDataOnly(true); //Call to undefined method
$objPHPExcel->enableMemoryOptimization(); //Call to undefined method