use \Tamtamchik\NameCase\Formatter;

// As a static call
Formatter::nameCase("KEITH");                            // => Keith
Formatter::nameCase("LEIGH-WILLIAMS");                   // => Leigh-Williams
Formatter::nameCase("MCCARTHY");                         // => McCarthy
Formatter::nameCase("O'CALLAGHAN");                      // => O'Callaghan
Formatter::nameCase("ST. JOHN");                         // => St. John
Formatter::nameCase("VON STREIT");                       // => von Streit
Formatter::nameCase("AP LLWYD DAFYDD");                  // => ap Llwyd Dafydd
Formatter::nameCase("HENRY VIII");                       // => Henry VIII
Formatter::nameCase("VAN DYKE");                         // => van Dyke
Formatter::nameCase("JJ ABRAMS");                        // => JJ Abrams
Formatter::nameCase("PRINCE PHILIP, DUKE OF EDINBURGH"); // => Prince Philip, Duke of Edinburgh

// Or as an instance
$formatter = new Formatter();
$formatter->nameCase("LOUIS XIV");          // => Louis XIV

// Passing options
Formatter::setOptions([
  'lazy'        => true,
  'irish'       => true,
  'spanish'     => false,
  'roman'       => true,
  'hebrew'      => true,
  'postnominal' => true,
]);

// Or
$formatter = new Formatter(['spanish' => true]);

// Or 
$formatter->setOptions([
    'lazy' = false, 
    'postnominal' => false
]);

// Or even
Formatter::nameCase("VAN DYKE", ['lazy' = false]);

<?php

use Tamtamchik\NameCase\Formatter;

if ( ! function_exists('str_name_case')) {

    /**
     * Wrapper for NameCase object to be used as global function.
     *
     * @param string $string  - string to NameCase.
     * @param array  $options - options for NameCase.
     *
     * @return string
     */
    function str_name_case($string, $options = [])
    {
        return Formatter::nameCase($string, $options);
    }
}

<?php

use Tamtamchik\NameCase\Formatter;

Formatter::excludePostNominals('MOst');

Formatter::nameCase('ČERNÝ MOST');