PHP on Alpine gives `Warning: Use of undefined constant GLOB_BRACE`

[zrhoffman]

Steps to reproduce:

docker run --rm -it php:alpine php -r 'var_dump(GLOB_BRACE);'

Expected result

int(1024)

Actual result

Warning: Use of undefined constant GLOB_BRACE - assumed 'GLOB_BRACE' (this will throw an Error in a future version of PHP) in Command line code on line 1
string(10) "GLOB_BRACE"

This is an Alpine-specific issue. docker run --rm -it php:stretch php -r 'var_dump(GLOB_BRACE);' produces the expected result.

[wglambert]

Similar wp-cli/wp-cli#4353 (comment)

[hairmare]

The manual states

Note: The GLOB_BRACE flag is not available on some non GNU systems, like Solaris.

Alpine ships with musl libc which is MIT and not GNU.

[tianon]

That's a bummer -- looks like there's nothing we can do here except recommend that if you require this constant, you need to switch to the Debian-based images off Alpine.

[hairmare]

zend-stdlib has a fallback wrapper

\Zend\Stdlib\Glob::glob($pattern, $flags = 0, $forceFallback = false)

It can be installed with composer

composer require zendframework/zend-stdlib

[brandontamm]

+1 for @hairmare's solution - it works!

I was building docker php container FROM php-7.0-fpm-alpine and trying to bin/magento setup:upgrade when I ran into the error:

[Exception]
Notice: Use of undefined constant GLOB_BRACE - assumed 'GLOB_BRACE' in /app/c
urrent/XXXXXX/vendor/zendframework/zend-stdlib/src/Glob.php on line 64

In my instance, my version of Magento (2.1.8) required using
composer require zendframework/zend-stdlib 2.4.13

[shiroamada]

That's a bummer -- looks like there's nothing we can do here except recommend that if you require this constant, you need to switch to the Debian-based images off Alpine.

what docker image can you recommended?

[tianon]

what docker image can you recommended?

If you're using php:7.4-fpm-alpine*, switch to php:7.4-fpm-buster instead, etc.

For further help, I'd suggest the Docker Community Forums, the Docker Community Slack, or Stack Overflow.