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replaceMatches example

$map = $this->symbolsMap[$parent];
                }
            }
            if ($map) {
                foreach ($map as $char => $replace) {
                    $unicodeString = $unicodeString->replace($char, ' '.$replace.' ');
                }
            }
        }

        return $unicodeString
            ->replaceMatches('/[^A-Za-z0-9]++/', $separator)
            ->trim($separator)
        ;
    }

    private function createTransliterator(string $locale): ?\Transliterator
    {
        if (\array_key_exists($locale, $this->transliterators)) {
            return $this->transliterators[$locale];
        }

        // Exact locale supported, cache and return

throw new InvalidArgumentException('Invalid UTF-8 string.');
            }

            $str->string = $string;
        }

        return $str;
    }

    public function replaceMatches(string $fromRegexp, string|callable $to): static
    {
        $str = parent::replaceMatches($fromRegexp, $to);
        normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);

        return $str;
    }

    public function slice(int $start = 0, int $length = null): static
    {
        $str = clone $this;

        $str->string = (string) grapheme_substr($this->string, $start, $length ?? 2147483647);

    public function ensureEnd(string $suffix): static
    {
        if (!$this->endsWith($suffix)) {
            return $this->append($suffix);
        }

        $suffix = preg_quote($suffix);
        $regex = '{('.$suffix.')(?:'.$suffix.')++$}D';

        return $this->replaceMatches($regex.($this->ignoreCase ? 'i' : ''), '$1');
    }

    public function ensureStart(string $prefix): static
    {
        $prefix = new static($prefix);

        if (!$this->startsWith($prefix)) {
            return $this->prepend($prefix);
        }

        $str = clone $this;

'hemmo wormd', 3, 'hello world', 'l', 'm'],
            ['hello world', 0, 'hello world', 'L', 'm'],
        ];
    }

    /** * @dataProvider provideReplaceMatches */
    public function testReplaceMatches(string $expectedString, string $origin, string $fromRegexp, $to)
    {
        $origin = static::createFromString($origin);
        $result = $origin->replaceMatches($fromRegexp, $to);

        $this->assertEquals(static::createFromString($expectedString), $result);
    }

    public static function provideReplaceMatches()
    {
        return [
            ['April,15,2003', 'April 15, 2003', '/(\w+) (\d+), (\d+)/i', '${1},$2,$3'],
            ['5/27/1999', '1999-5-27', '/(19|20)(\d{2})-(\d{1,2})-(\d{1,2})/', '\3/\4/\1\2'],
            ['Copyright 2000', 'Copyright 1999', '([0-9]+)', '2000'],
            ['hello world! this is a test', 'HELLO WORLD! THIS is a test', '/\b([A-Z]+)\b/', fn ($word) => strtolower($word[1])],
            [

if (false === $str->string) {
                throw new InvalidArgumentException('Invalid UTF-8 string.');
            }
        }

        return $str;
    }

    public function replaceMatches(string $fromRegexp, string|callable $to): static
    {
        $str = parent::replaceMatches($fromRegexp, $to);
        normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);

        return $str;
    }

    public function slice(int $start = 0, int $length = null): static
    {
        $str = clone $this;

        $str->string = (string) grapheme_substr($this->string, $start, $length ?? 2147483647);