Configuring PHP_CodeSniffer in PhpStorm

Navigae to Preferences > Languages & Frameworks > PHP > Quality Tools and expand the PHP_CodeSniffer section and select Configuration to Local like following

Next, we have to set the binary paths of PHP_CodeSniffer. For that click on the three dots button next to Configuration dropdown and then inside the opened dialog set the phpcs and phpcbf binary paths:

Finally we have to enable the PHP_CodeSniffer in the IDE by navigating to Preferences > Editor > Inspections > PHP > Quality Tools and enable the PHP CS Fixer validation and PHP_CodeSniffer validation.