Use tab for indentation in PHP-CS-Fixer

First create .php_cs file in your project root directory. Then add the below lines to .php_cs file

<?php
return PhpCsFixer\Config::create()
->setRules([
    '@PSR2' => true,
    'indentation_type' => true,
])
->setIndent("\t")
->setLineEnding("\n")
->setFinder($finder)

Then run the below command to fix the issue

vendor/bin/php-cs-fixer fix . --config .php_cs

It was there in the documentation, and some how I missed it (probably because I was searching for the term 'tab' instead of 'indentation')

For anyone else looking for the same, there is a setIndent method in PhpCsFixer\Config.

return PhpCsFixer\Config::create()
    ->setRules([
        '@PSR2' => true,
        'indentation_type' => true,
    ])
    ->setIndent("\t")
    ->setLineEnding("\n")
    ->setFinder($finder)