php-cs-fixer-stdinout.php

#!/bin/php
<?php

/**
 * Helper script to use php-cs-fixer with stdin / stdout
 **/

$temp_file = tempnam(sys_get_temp_dir(), 'fix_');

$input = file_get_contents("php://stdin");

file_put_contents($temp_file, $input);

$output = [];
$returnCode;
exec('bin/php-cs-fixer fix --quiet ' . $temp_file, $output, $returnCode);

if ($returnCode) {
    // Error occurred
    exit($returnCode);
}

echo file_get_contents($temp_file);

unlink($temp_file);

@Epskampie you absolute hero.