Check the syntax of PHP files in parallel. More information: https://github.com/JakubOnderka/PHP-Parallel-Lint.
parallel-lint path/to/directory
parallel-lint -j processes path/to/directory
parallel-lint --exclude path/to/excluded_directory path/to/directory
parallel-lint -e php,html,phpt path/to/directory
parallel-lint --json path/to/directory
parallel-lint --blame path/to/directory