vendor/sensio/generator-bundle/Command/Validators.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sensio\Bundle\GeneratorBundle\Command;

/**
 * Validator functions.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Validators
{
    /**
     * Validates that the given namespace (e.g. Acme\FooBundle) is a valid format.
     *
     * If $requireVendorNamespace is true, then we require you to have a vendor
     * namespace (e.g. Acme).
     *
     * @param $namespace
     * @param bool $requireVendorNamespace
     *
     * @return string
     */
    public static function validateBundleNamespace($namespace, $requireVendorNamespace = true)
    {
        if (!preg_match('/Bundle$/', $namespace)) {
            throw new \InvalidArgumentException('The namespace must end with Bundle.');
        }

        $namespace = strtr($namespace, '/', '\\');
        if (!preg_match('/^(?:[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*\\\?)+$/', $namespace)) {
            throw new \InvalidArgumentException('The namespace contains invalid characters.');
        }

        // validate reserved keywords
        $reserved = self::getReservedWords();
        foreach (explode('\\', $namespace) as $word) {
            if (in_array(strtolower($word), $reserved)) {
                throw new \InvalidArgumentException(sprintf('The namespace cannot contain PHP reserved words ("%s").', $word));
            }
        }

        // validate that the namespace is at least one level deep
        if ($requireVendorNamespace && false === strpos($namespace, '\\')) {
            $msg = array();
            $msg[] = sprintf('The namespace must contain a vendor namespace (e.g. "VendorName\%s" instead of simply "%s").', $namespace, $namespace);
            $msg[] = 'If you\'ve specified a vendor namespace, did you forget to surround it with quotes (init:bundle "Acme\BlogBundle")?';

            throw new \InvalidArgumentException(implode("\n\n", $msg));
        }

        return $namespace;