Problem with UTF-8 characters

[mikehaertl]

In mikehaertl/phpwkhtmltopdf#108 (comment) it was reported, that UTF-8 characters in arguments do not work.

Here they recommend to use the following environment variables:

// An environment variable
  $env = array(
    'LANG' => 'lv_LV.utf-8'
  );

[mikehaertl]

I could reproduce the issue, but only on the web:

use mikehaertl\shellcommand\Command;
$command = new Command('/bin/test');
$command->addArg('-t',  '中文字äüp');
die ((string)$command);

The issue is caused by escapeshellargs() which eliminates any non-ASCII characters. Calling setlocale(LC_CTYPE, "en_US.UTF-8"); before fixes this. We can try to set this automatically before escapeshellargs() is called, and revert afterwards.

setlocale() can also be set to get the current locale. From the PHP manual:

If locale is "0", the locale setting is not affected, only the current setting is returned.