When image source is a link, return the link and don't give a PHP notice.

[jarrettj]

This is:

- [ ] a bug report
- [x] a feature request
- [ ] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)

What is the expected behavior?

Would be great if the image source URL is handled better. If it could be returned in someway? At the moment I use the following snippet to extract other images https://phpspreadsheet.readthedocs.io/en/latest/topics/recipes/#reading-images-from-a-worksheet.

What is the current behavior?

At the moment you receive a notice instead. See [PR 1970] #1970.

What are the steps to reproduce?

Open a file that contains images that have a URL as source.
You will get notices of the array index not being defined.

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php

require __DIR__ . '/vendor/autoload.php';

$inputFileType = IOFactory::identify($filePath);
$reader = IOFactory::createReader($inputFileType);
# Notices happen on load.
$spreadsheet = $reader->load($filePath);
$sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);

Which versions of PhpSpreadsheet and PHP are affected?

1.17.1

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
If this is still an issue for you, please try to help by debugging it further and sharing your results.
Thank you for your contributions.