rector/packages/node-name-resolver/src/Regex/RegexPatternDetector.php

<?php

declare(strict_types=1);

namespace Rector\NodeNameResolver\Regex;

use Nette\Utils\Strings;

final class RegexPatternDetector
{
    public function isRegexPattern(string $name): bool
    {
        if (Strings::length($name) <= 2) {
            return false;
        }

        $firstChar = $name[0];
        $lastChar = $name[strlen($name) - 1];
        if ($firstChar !== $lastChar) {
            return false;
        }

        // this prevents miss matching like "aMethoda"
        $possibleDelimiters = ['#', '~', '/'];

        return in_array($firstChar, $possibleDelimiters, true);
    }
}