Initials

initials.php

<?php

class Initials 
{

    /**
     * Generate initials from a name
     * @param string name
     * @return string
     */
    public function generate(string $name) 
    {
        $words = epode(' ', $name);
        if (count($words) >= 2) 
            return strtoupper(substr($words[0], 0, 1). substr(end($words), 0, 1));        
        return $this->makeInitialsFromSingleWord($name);
    }

    /**
     * Make initials from a word
     * @param string name
     * @return string
     */
    public function makeInitialsFormSingleWord(string $name)
    {
        preg_match_all('#([A-Z]+)#', $name, $capitals);
        if (count($capitals[1]) >= 2)
            return substr(implode('', $capitals[1]), 0, 2);
        return strtoupper(substr($name, 0, 2));        
    }

}