Cyrilic symbols in filename produce notice

Prerequisites

[ ] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
[x] The issue still exists against the latest master branch of yii2-export.
[x] This is not an usage question. I confirm having gone through and read the documentation and demos.
[x] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
[x] I have attempted to find the simplest possible steps to reproduce the issue.
[ ] I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

filename


    <?= ExportMenu::widget([
...
        'filename' => 'Список заявок', // non-latin produce notice
...
    ]); ?>

2. try to download
3. catch notice

## Expected behavior and actual behavior

When I follow those steps, I see...

PHP Notice – yii\base\ErrorException iconv(): Detected an illegal character in input string

in /app/vendor/kartik-v/yii2-export/src/ExportMenu.phpat line 802 793794795796797798799800801802803804805806807808809810811 } } $this->raiseEvent('onRenderSheet', [$sheet, $this]); $this->folder = trim(Yii::getAlias($this->folder)); if (!file_exists($this->folder) && !mkdir($this->folder, 0777, true)) { throw new InvalidConfigException( "Invalid permissions to write to '{$this->folder}' as set in ExportMenu::folder property." ); } $filename = iconv("UTF-8", "ISO-8859-1//TRANSLIT", $this->filename); $file = self::slash($this->folder) . $filename . '.' . $config['extension']; if ($this->stream) { $this->clearOutputBuffers(); } $writer->save($file); if ($this->stream) { $this->setHttpHeaders(); $this->clearOutputBuffers(); readfile($file);


I was expecting...
Download sucessful

note: ignoring error provide correct result
https://github.com/kartik-v/yii2-export/blob/f76c63e4f60661655ced726dc758a36da4182abc/src/ExportMenu.php#L802

    $filename = @iconv("UTF-8", "ISO-8859-1//TRANSLIT", $this->filename);

also  `//TRANSLIT`  -> `//IGNORE`  have same effect

    $filename = iconv("UTF-8", "ISO-8859-1//IGNORE", $this->filename);



## Environment

#### Browsers

- [ ] Google Chrome
- [ ] Mozilla Firefox
- [ ] Internet Explorer
- [ ] Safari

#### Operating System

- [ ] Windows
- [ ] Mac OS X
- [ ] Linux
- [ ] Mobile

#### Libraries

- jQuery version:
- yii2-export version: kartik-v/yii2-export dev-master A library to export server/db data in various formats (e.g. excel, html, pdf, csv etc.)

## Isolating the problem

- [ ] This bug happens [on the demos page](https://demos.krajee.com/export-demo)
- [ ] The bug happens consistently across all tested browsers
- [ ] This bug happens when using yii2-export without other plugins.

<bountysource-plugin>

---
Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/91584520-cyrilic-symbols-in-filename-produce-notice?utm_campaign=plugin&utm_content=tracker%2F7668315&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F7668315&utm_medium=issues&utm_source=github).
</bountysource-plugin>

kartik-v / yii2-export

Cyrilic symbols in filename produce notice #324

Prerequisites

Steps to reproduce the issue