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<?php class CheckForMaximumNumberOfCharacters { private string $format = 'Это поле содержит %d символов. Максимальное количество символов для этого поля - %u'; private int $standard; public function __construct(int $standard) { $this->standard = $standard; } public function __invoke(mixed $value): ?string { $numberOfCharacters = iconv_strlen($value); return ($numberOfCharacters > $this->standard) ? sprintf($this->format, $numberOfCharacters, $this->standard) : null; } }
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