Reuse Excel business logic with PHPExcel - Maarten Balliauw {blog}
2016
Replace Excel errors using this function - Journal of Accountancy
php - calculating sum with PHPExcel - Stack Overflow
Accessing cells - PhpSpreadsheet Documentation
Accessing cells - PhpSpreadsheet Documentation
phpexcel - Sum calculation of excel column - PHP Excel - Stack Overflow
phpexcel 1.8.1 Calculation error · Issue #1176 · PHPOffice/PHPExcel · GitHub
How to Sum Diagonal Cells in a range in Excel? - GeeksforGeeks
How to Create/Read EXCEL files in PHP - IOmundo
Accessing cells - PhpSpreadsheet Documentation
ILIAS: PHPExcel_Calculation Class Reference
PHPExcel developer documentation
2016
Calculation Engine - PhpSpreadsheet Documentation
php - Date calculation with PHPExcel library - Stack Overflow
getCalculatedValue() problem using IF formula with PHPExcel | Just a Day in the Office
How to Create/Read EXCEL files in PHP - IOmundo
2016
PHP | Spreadsheet | Setting a date and/or time value in a cell - GeeksforGeeks
ILIAS: PHPExcel_Calculation Class Reference
php - Read Excel's internal calculated values with PHPExcel - Stack Overflow
php - Excel Total Hours Calculation using PHPExcel in HH:MM format with HH greater than 24 hours - Stack Overflow
