Problem:While working with PHPExcel you can get the following error:
Fatal error: Class 'PHPExcel_Reader_excel2007' not found in IOFactory.php
Solution:The main reason is you are using "excel2007" or "excel5"
You need to use "Excel2007" or "Excel5" instead of "excel2007" or "excel5"
Please not that difference between "e" and "E".
Example:Use as below:
$objReader = PHPExcel_IOFactory::createReader('Excel2007');//Excel2007 or Excel5
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