36 lines
895 B
PHP
36 lines
895 B
PHP
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<?php
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/*
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* This file is part of Respect/Validation.
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*
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* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
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*
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* For the full copyright and license information, please view the LICENSE file
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* that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use function is_string;
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use function preg_match;
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/**
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* Validates if a value is considered a valid PHP Label, so that it can be used as a variable, function or class name.
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*
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* @author Danilo Correa <danilosilva87@gmail.com>
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* @author Emmerson Siqueira <emmersonsiqueira@gmail.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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final class PhpLabel extends AbstractRule
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{
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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return is_string($input) && preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $input);
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}
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}
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