README: "İNATÇI" to "inatçı" about slug-generator HOT 1 OPEN

That depends on the configured valid character set:

// Default settings
generate('İNATÇI');
// Result: inatci

// Turkish lowercase alphabet and Turkish locale
generate('İNATÇI', ['locale' => 'tr', 'validChars' => 'a-pr-vyzçğıöşü']);
// Result: inatçı

Note that in the second example the I gets lowercased to ı instead of i. This is a special case for Turkish.

This behavior is important if for example you want to allow all unicode characters in your slug but only lowercase ones (e.g. \p{Ll}).

from slug-generator.