vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Drawing.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Worksheet;

use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;

class Drawing extends BaseDrawing
{
    /**
     * Path.
     *
     * @var string
     */
    private $path;

    /**
     * Create a new Drawing.
     */
    public function __construct()
    {
        // Initialise values
        $this->path = '';

        // Initialize parent
        parent::__construct();
    }

    /**
     * Get Filename.
     *
     * @return string
     */
    public function getFilename()
    {
        return basename($this->path);
    }

    /**
     * Get indexed filename (using image index).
     *
     * @return string
     */
    public function getIndexedFilename()
    {
        $fileName = $this->getFilename();
        $fileName = str_replace(' ', '_', $fileName);

        return str_replace('.' . $this->getExtension(), '', $fileName) . $this->getImageIndex() . '.' . $this->getExtension();
    }

    /**
     * Get Extension.
     *
     * @return string
     */
    public function getExtension()
    {
        $exploded = explode('.', basename($this->path));

        return $exploded[count($exploded) - 1];