public function getConstantSuffix()
    {
        $separator = PhpNameGenerator::STD_SEPARATOR_CHAR;
        return strtoupper(rtrim(preg_replace('/(\W|_)+/', $separator, $this->key), $separator));
    }
public function getConstantSuffix()
    {
        $separator = PhpNameGenerator::STD_SEPARATOR_CHAR;
        return strtoupper(rtrim(preg_replace('/(\W|_)+/', $separator, $this->key), $separator));
    }
public function getConstantSuffix ( ) { $ separator = PhpNameGenerator :: STD_SEPARATOR_CHAR ; return strtoupper ( rtrim ( preg_replace ( '/(\W|_)+/' , $ separator , $ this -> key ) , $ separator ) ) ; }
Get constant names' safe value of the key name.

@return string
Get constant names safe value of the key name .