s example

                $r = [$inputStream];
            }
            $c = fread($inputStream, 1);

            // as opposed to fgets(), fread() returns an empty string when the stream content is empty, not false.             if (false === $c || ('' === $ret && '' === $c && null === $question->getDefault())) {
                shell_exec('stty '.$sttyMode);
                throw new MissingInputException('Aborted.');
            } elseif ("\177" === $c) { // Backspace Character                 if (0 === $numMatches && 0 !== $i) {
                    --$i;
                    $cursor->moveLeft(s($fullChoice)->slice(-1)->width(false));

                    $fullChoice = self::substr($fullChoice, 0, $i);
                }

                if (0 === $i) {
                    $ofs = -1;
                    $matches = $autocomplete($ret);
                    $numMatches = \count($matches);
                } else {
                    $numMatches = 0;
                }

                

                $r = [$inputStream];
            }
            $c = fread($inputStream, 1);

            // as opposed to fgets(), fread() returns an empty string when the stream content is empty, not false.             if (false === $c || ('' === $ret && '' === $c && null === $question->getDefault())) {
                shell_exec('stty '.$sttyMode);
                throw new MissingInputException('Aborted.');
            } elseif ("\177" === $c) { // Backspace Character                 if (0 === $numMatches && 0 !== $i) {
                    --$i;
                    $cursor->moveLeft(s($fullChoice)->slice(-1)->width(false));

                    $fullChoice = self::substr($fullChoice, 0, $i);
                }

                if (0 === $i) {
                    $ofs = -1;
                    $matches = $autocomplete($ret);
                    $numMatches = \count($matches);
                } else {
                    $numMatches = 0;
                }

                

use function Symfony\Component\String\b;
use function Symfony\Component\String\s;
use function Symfony\Component\String\u;

final class FunctionsTest extends TestCase
{
    /** * @dataProvider provideSStrings */
    public function testS(AbstractString $expected, ?string $input)
    {
        $this->assertEquals($expected, s($input));
    }

    public static function provideSStrings(): array
    {
        return [
            [new UnicodeString(''), ''],
            [new UnicodeString(''), null],
            [new UnicodeString('foo'), 'foo'],
            [new UnicodeString('अनुच्छेद'), 'अनुच्छेद'],
            [new ByteString("b\x80ar"), "b\x80ar"],
            [new ByteString("\xfe\xff"), "\xfe\xff"],
        ];