Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Worksheet.php
public function getCell($pCoordinate, $createIfNotExists = true)
    {
        // Check cell collection
        if ($this->cellCollection->has(strtoupper($pCoordinate))) {
            return $this->cellCollection->get($pCoordinate);
        }

        // Worksheet reference?
        if (strpos($pCoordinate, '!') !== false) {
            $worksheetReference = self::extractSheetTitle($pCoordinate, true);

            return $this->parent->getSheetByName($worksheetReference[0])->getCell(strtoupper($worksheetReference[1]), $createIfNotExists);
        }

        // Named range?
        if ((!preg_match('/^' . Calculation::CALCULATION_REGEXP_CELLREF . '$/i', $pCoordinate, $matches)) &&
            (preg_match('/^' . Calculation::CALCULATION_REGEXP_NAMEDRANGE . '$/i', $pCoordinate, $matches))) {
            $namedRange = NamedRange::resolveRange($pCoordinate, $this);
            if ($namedRange !== null) {
                $pCoordinate = $namedRange->getRange();

                return $namedRange->getWorksheet()->getCell($pCoordinate, $createIfNotExists);
            }
        }

        // Uppercase coordinate
        $pCoordinate = strtoupper($pCoordinate);

        if (Coordinate::coordinateIsRange($pCoordinate)) {
            throw new Exception('Cell coordinate can not be a range of cells.');
        } elseif (strpos($pCoordinate, '$') !== false) {
            throw new Exception('Cell coordinate must not be absolute.');
        }

        // Create new cell object, if required
        return $createIfNotExists ? $this->createNewCell($pCoordinate) : null;
    }
public function getCell($pCoordinate, $createIfNotExists = true)
    {
        // Check cell collection
        if ($this->cellCollection->has(strtoupper($pCoordinate))) {
            return $this->cellCollection->get($pCoordinate);
        }

        // Worksheet reference?
        if (strpos($pCoordinate, '!') !== false) {
            $worksheetReference = self::extractSheetTitle($pCoordinate, true);

            return $this->parent->getSheetByName($worksheetReference[0])->getCell(strtoupper($worksheetReference[1]), $createIfNotExists);
        }

        // Named range?
        if ((!preg_match('/^' . Calculation::CALCULATION_REGEXP_CELLREF . '$/i', $pCoordinate, $matches)) &&
            (preg_match('/^' . Calculation::CALCULATION_REGEXP_NAMEDRANGE . '$/i', $pCoordinate, $matches))) {
            $namedRange = NamedRange::resolveRange($pCoordinate, $this);
            if ($namedRange !== null) {
                $pCoordinate = $namedRange->getRange();

                return $namedRange->getWorksheet()->getCell($pCoordinate, $createIfNotExists);
            }
        }

        // Uppercase coordinate
        $pCoordinate = strtoupper($pCoordinate);

        if (Coordinate::coordinateIsRange($pCoordinate)) {
            throw new Exception('Cell coordinate can not be a range of cells.');
        } elseif (strpos($pCoordinate, '$') !== false) {
            throw new Exception('Cell coordinate must not be absolute.');
        }

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

@param string $pCoordinate Coordinate of the cell, eg: 'A1'
@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

@throws Exception

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