Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php
public function getCellByColumnAndRow($columnIndex, $row, $createIfNotExists = true)
    {
        $columnLetter = Coordinate::stringFromColumnIndex($columnIndex);
        $coordinate = $columnLetter . $row;

        if ($this->cellCollection->has($coordinate)) {
            return $this->cellCollection->get($coordinate);
        }

        // Create new cell object, if required
        return $createIfNotExists ? $this->createNewCell($coordinate) : null;
    }
public function getCellByColumnAndRow($columnIndex, $row, $createIfNotExists = true)
    {
        $columnLetter = Coordinate::stringFromColumnIndex($columnIndex);
        $coordinate = $columnLetter . $row;

        if ($this->cellCollection->has($coordinate)) {
            return $this->cellCollection->get($coordinate);
        }

        // Create new cell object, if required
        return $createIfNotExists ? $this->createNewCell($coordinate) : null;
    }
Get cell at a specific coordinate by using numeric cell coordinates.

@param int $columnIndex Numeric column coordinate of the cell
@param int $row Numeric row coordinate of the cell
@param bool $createIfNotExists Flag indicating whether a new cell should be created if it doesn't
already exist, or a null should be returned instead

@return null|Cell Cell that was found/created or null