[PHPCodeSniffer](https://www.mediawiki.org/wiki/Continuous_integration/PHP_CodeSniffer) helps us stick to same coding standards across MediaWiki and its extensions. Currently `MobileFrontend` [phpcs config](https://phabricator.wikimedia.org/diffusion/EMFR/browse/master/.phpcs.xml) differs from the MediaWiki one - the following sniffs are disabled:
[ ] MediaWiki.Files.ClassMatchesFilename.NotMatch" />
[ ] MediaWiki.Files.OneClassPerFile.MultipleFound" />
[ ] MediaWiki.WhiteSpace.SpaceBeforeSingleLineComment.NewLineComment
[ ] MediaWiki.Usage.ExtendClassUsage.FunctionVarUsage
== Google Code In
@jdlrobson will mentor this.
The task should be timeboxed till 2-3hrs - work on re-enabling one sniff at a time. If you exceed the timebox push what you managed - every little bit helps!
To get setup install https://github.com/squizlabs/PHP_CodeSniffer globally and then run the following inside the MobileFrontend repo
phpcs -p -s
They should all pass as we are excluding certain rules inside .phpcs.xml
Runing `phpcs` without all those exclusions gives 18 errors and 52 warnings.
== Plan (YMMV)
 Remove a single sniff from the `.phpcs.xml` file (an exclude tag), run `composer phpcs` or `phpcs -p -s`, get a list of violations,
provide patches in [Wikimedia Gerrit](https://www.mediawiki.org/wiki/Gerrit/Tutorial) to fix the violations. **If** you fix all violations for one sniff, also commit the removal of the exclusion from `.phpcs.xml` too.
 Commit the change when everything passes
 Repeat until you have spent more than 3 hours on this task. You may be able to fix them all in this timebox, but you should not feel bad if you don't!
 As many of the sniffs are made to pass as is possible.
 If a sniff can't be made to pass for some reason, then document it as close as possible to the line disabling the sniff.
== Developer notes
CodeSniffer output: P5742