Git pre-commit hook that checks the syntax of commited php files and runs the php-cs-fixer on them.

pre-commit

#!/usr/bin/env php
<?php
/**
 * .git/hooks/pre-commit
 *
 * This pre-commit hooks will check for PHP error (lint), and make sure the code
 * is PSR compliant.
 *
 * Dependency: PHP-CS-Fixer (https://github.com/fabpot/PHP-CS-Fixer)
 */

exec("pwd", $projectFolder);
$projectFolder = $projectFolder[0];

exec('git diff --cached --name-status --diff-filter=ACM', $output);

foreach ($output as $file) {
    $fileName = trim(substr($file, 1) );

    if (pathinfo($fileName,PATHINFO_EXTENSION) === "php" || pathinfo($fileName, PATHINFO_EXTENSION) === "twig") {

        $lint_output = array();
        exec("php -l " . escapeshellarg($fileName), $lint_output, $return);

        if ($return == 0) {
            exec("php-cs-fixer fix {$projectFolder}/{$fileName} --level=symfony; git add {$projectFolder}/{$fileName}");
        } else {
            echo implode("\n", $lint_output), "\n";

            exit(1);
        }
    }
}

echo " OK.\n";

exit(0);