This script checks if a web server meets the minimum requirements to run a Craft 4 installation.

Run the following in a terminal of any *nix environment (e.g. Linux, MacOS, WSL):

curl -Lsf https://raw.githubusercontent.com/craftcms/server-check/HEAD/check.sh | bash

Note You can review the substance of this script before execution.

Upload the server/ folder to your web server’s web root and load checkit.php from a browser to get an HTML report.

The same server/ folder can be uploaded anywhere on your server and used via the command line to get a plain-text report:

php checkit.php

This is equivalent to the default usage instructions, above.

If all requirements are met, the script will return an exit code of 0.

The script will return an exit code of 1 if:

• Any errors are encountered, or requirements are not met

• An environment variable CRAFT_STRICT_SERVER_CHECK=1 is set, and any warnings are found:

  CRAFT_STRICT_SERVER_CHECK=1 php server/checkit.php

This can be especially useful in a CI/CD pipeline, or a Dockerfile, where you want the process to fail if the check does not pass:

# Dockerfile
FROM php:8.0-fpm
RUN curl -Lsf https://raw.githubusercontent.com/craftcms/server-check/HEAD/check.sh | bash

The official Craft Docker Images run this check when building to be certain all of Craft's requirements are met in any built image.