Math setup fails on locale with comma as decimal point

[mishal]

Math setup fails on locale with comma as decimal point

[mishal]

Which locale are you speaking about?

[tapetersen]

I don't know the specifics with the different locale variables but in some countries (for example SWEDEN locale sv_SE) numbers are formatted using a comma "," as decimal point instead of a point ".". Php uses those settings when converting numbers to strings which means that for example during
Iless_UnitConversion::setup() on UnitConversion.php:66 Iless_Math::divide gets called with '2' and M_PI, which then gets converted to string as M_PI => "3,141592....". bcmul in turn doesn't respect the locale when parsing that string and treats it as 0 resulting in a divide by zero error.

The locale can be manipulated by http://www.php.net/manual/en/function.setlocale.php

For example:
$saved_locale = setlocale('LC_ALL', 0);
setlocale('LC_ALL', 'C');

// Do math stuff

setlocale('LC_ALL', $saved_locale);

would solve the problem.
Another option would be to do the float to string conversion explicitly with
http://www.php.net/manual/en/function.number-format.php
number_format(M_PI, 10, '.'. '')
instead of through a cast.