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# Syntax Check

## Domains / IPs Syntax

PyFunceble can check the syntax of domains and IPs.

### Input Source: Inline

You can check the syntax of a domain or IP, by running PyFunceble with the `-d` argument along with `--syntax` argument.

    pyfunceble -d github.com --syntax

The `-d` argument can also take multiple domains to test.

    pyfunceble -d github.com gitlab.com gitea.com 93.184.216.34 --syntax

### Input Source: File

You can check the syntax of the domains or IPs located inside a file, by giving the file path-s to PyFunceble through the `-f` argument.

    pyfunceble -f ./source.list --syntax
    pyfunceble -f https://example.org/my/awesome/file --syntax

When using the `-f` argument, the inputted source can be:

- any file-s on your filesystem accessible by the user running PyFunceble.
- an HTTP (raw) URLs of the file you want PyFunceble to download and check.

When testing for the syntax of domains or IPs, PyFunceble supports the following file formats:

- hosts file
- plain text file
- AdBlock filter list (please use with the `--adblock` argument)
- RPZ (formatted) file (please use with the `--rpz` argument)

## URLs Syntax

PyFunceble can check the syntax of URLs.

### Input Source: Inline

You can check the syntax of a URL through the `-u` argument of PyFunceble.

    pyfunceble -u https://github.com/pyfunceble

That `-u` argument can also take multiple URLs to test.

    pyfunceble -u https://github.com/pyfunceble https://gitlab.com/funilrys https://gitea.com

### Input Source: File

You can check the snytax of the URLs located inside a file, by giving the file path-s to PyFunceble through the `-uf` argument.

    pyfunceble -uf ./source.url.list
    pyfunceble -uf https://example.org/my/awesome/file

Just like the `-f` argument, when using the `-uf` argument, the inputted source can be:

- any file-s on your filesystem accessible by the user running PyFunceble.
- an HTTP (raw) URL-s of the file you want PyFunceble to download and check.

When testing the syntax of URLs, PyFunceble following the following formats:

- plain text file