ctype_alpha

Supported Versions: PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8
Check for alphabetic character(s)
ctype_alpha(mixed $text): bool
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        }



        $splitDriveLetter = function ($path) {

            return (\strlen($path) > 2 && ':' === $path[1] && '/' === $path[2] && ctype_alpha($path[0]))

                ? [substr($path, 2), strtoupper($path[0])]

                : [$path, null];

        };
tests/Composer/Test/Fixtures/functional/installed-versions2/vendor/symfony/filesystem/Filesystem.php
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    public function isAbsolutePath(string $file)

    {

        return '' !== $file && (strspn($file, '/\\', 0, 1)

            || (\strlen($file) > 3 && ctype_alpha($file[0])

                && ':' === $file[1]

                && strspn($file, '/\\', 2, 1)

            )
tests/Composer/Test/Fixtures/functional/installed-versions2/vendor/symfony/filesystem/Filesystem.php