我用PHP7在Ubuntu 16.04服务器上运行laravel 5.4。安装cviebrock/eloquent-sluggable包时抛出一些错误:

pish@let:/home/sherk/ftp/www$ sudo composer require cviebrock/eloquent-sluggable
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Using version ^4.2 for cviebrock/eloquent-sluggable
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - phpunit/php-code-coverage 4.0.7 requires ext-dom * -> the requested PHP extension dom is missing from your system.
    - phpunit/php-code-coverage 4.0.7 requires ext-dom * -> the requested PHP extension dom is missing from your system.
    - Installation request for phpunit/php-code-coverage (installed at 4.0.7) -> satisfiable by phpunit/php-code-coverage[4.0.7].

  To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php/7.0/cli/php.ini
    - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
    - /etc/php/7.0/cli/conf.d/10-opcache.ini
    - /etc/php/7.0/cli/conf.d/10-pdo.ini
    - /etc/php/7.0/cli/conf.d/20-calendar.ini
    - /etc/php/7.0/cli/conf.d/20-ctype.ini
    - /etc/php/7.0/cli/conf.d/20-exif.ini
    - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.0/cli/conf.d/20-ftp.ini
    - /etc/php/7.0/cli/conf.d/20-gd.ini
    - /etc/php/7.0/cli/conf.d/20-gettext.ini
    - /etc/php/7.0/cli/conf.d/20-iconv.ini
    - /etc/php/7.0/cli/conf.d/20-json.ini
    - /etc/php/7.0/cli/conf.d/20-mbstring.ini
    - /etc/php/7.0/cli/conf.d/20-mcrypt.ini
    - /etc/php/7.0/cli/conf.d/20-mysqli.ini
    - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
    - /etc/php/7.0/cli/conf.d/20-phar.ini
    - /etc/php/7.0/cli/conf.d/20-posix.ini
    - /etc/php/7.0/cli/conf.d/20-readline.ini
    - /etc/php/7.0/cli/conf.d/20-shmop.ini
    - /etc/php/7.0/cli/conf.d/20-sockets.ini
    - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.0/cli/conf.d/20-tokenizer.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Installation failed, reverting ./composer.json to its original content.

我在本地版本的应用程序上安装这个包没有问题。

当我运行php artisan db:seed时，我得到以下错误:

[ReflectionException] Class SongsTableSeeder does not exist

这是怎么回事?

我的DatabaseSeeder类:

<?php

use Illuminate\Database\Seeder;
use Illuminate\Database\Eloquent\Model;

class DatabaseSeeder extends Seeder {

    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        Model::unguard();

        $this->call('SongsTableSeeder');
    }

}

我的SongsTableSeeder类:

<?php

// Composer: "fzaninotto/faker": "v1.4.0"
use Faker\Factory as Faker;
use Illuminate\Database\Seeder;
use DB;

class SongsTableSeeder extends Seeder {

    public function run()
    {
        $faker = Faker::create();
        $songs = [];
        foreach(range(1, 10) as $index)
        {
            $songs[] = ['title' => $faker->words(rand(1,4))];
        }

        DB::table('songs')->insert($songs);

    }

}

我一直在我的本地机器上使用Symfony 2.1开发一个项目。我已经将它上传到我的服务器上，但是当我尝试使用Composer安装供应商包时，我得到了很多依赖错误。这大概与最新版本的Symfony刚刚发布和我的作曲家有关。Json文件没有指定确切的版本号。

有什么方法可以快速显示本地机器上所有内容的版本号吗?

这是我的作曲家。Json文件(直到几天前工作都很好):

{
    "name": "symfony/framework-standard-edition",
    "description": "The \"Symfony Standard Edition\" distribution",
    "autoload": {
        "psr-0": { "": "src/" }
    },
    "require": {
        "php": ">=5.3.3",
        "symfony/symfony": "2.1.*",
        "doctrine/orm": ">=2.2.3,<2.4-dev",
        "doctrine/doctrine-bundle": "1.0.*",
        "twig/extensions": "1.0.*",
        "symfony/assetic-bundle": "2.1.*",
        "symfony/swiftmailer-bundle": "2.1.*",
        "symfony/monolog-bundle": "2.1.*",
        "sensio/distribution-bundle": "2.1.*",
        "sensio/framework-extra-bundle": "2.1.*",
        "sensio/generator-bundle": "2.1.*",
        "jms/security-extra-bundle": "1.2.*",
        "jms/di-extra-bundle": "1.1.*",
        "sonata-project/admin-bundle": "*",
        "sonata-project/cache-bundle": "dev-master",
        "sonata-project/doctrine-orm-admin-bundle": "dev-master",
        "stof/doctrine-extensions-bundle": "1.1.x-dev",
        "sonata-project/user-bundle": "dev-master",
        "sonata-project/easy-extends-bundle": "dev-master",
        "friendsofsymfony/user-bundle": "2.0.x-dev",
        "friendsofsymfony/jsrouting-bundle": "*",
        "liip/imagine-bundle": "*",
        "simplethings/form-extra-bundle": "dev-master",
        "antimattr/google-bundle": "dev-master",
        "doctrine/doctrine-fixtures-bundle": "dev-master",
        "genemu/form-bundle": "2.1.*",
        "behat/behat":                  "2.4.*@stable",
        "behat/mink":                   "1.4.*@stable",
        "behat/symfony2-extension":     "*@stable",
        "behat/mink-extension":         "*@stable",
        "behat/mink-selenium2-driver":  "*@stable",
        "behat/mink-browserkit-driver":  "*",
        "liip/functional-test-bundle": "dev-master"
    },
    "scripts": {
        "post-install-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
        ],
        "post-update-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
        ]
    },
    "minimum-stability": "dev",
    "extra": {
        "symfony-app-dir": "app",
        "symfony-web-dir": "web"
    },
    "config": {
        "bin-dir": "bin/"
    }
}

我试图通过运行下面的命令将HWIOAuthBundle添加到我的项目中。

composer require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

HWIOAuthBundle github： https://github.com/hwi/HWIOAuthBundle

当我试图运行作曲家要求，我得到了内存错误。

Using version ^0.6.0@dev for hwi/oauth-bundle Using version ^1.2@dev for php-http/guzzle6-adapter Using version ^1.10@dev for php-http/httplug-bundle ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 67108864 bytes) in phar:///usr/local/Cellar/composer/1.4.2/libexec/composer.phar/src/Composer/DependencyResolver/Solver.php on line 220 Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 67108864 bytes) in phar:///usr/local/Cellar/composer/1.4.2/libexec/composer.phar/src/Composer/DependencyResolver/Solver.php on line 220

我尝试在我的php.ini文件中设置内存限制为2G，但没有工作。我找到我的php.ini通过运行php -i | grep php.ini

我只需要为我的SF2发行版安装一个包(DoctrineFixtures)。

当我奔跑

php composer.phar update

我得到

  - Updating twig/twig (dev-master 39d94fa => v1.13.0)
    The package has modified files:
    M CHANGELOG
    M doc/filters/batch.test
    M doc/filters/index.rst
    M doc/filters/url_encode.rst
    M doc/functions/index.rst
    M doc/tags/index.rst
    M doc/tests/index.rst
    M lib/Twig/Autoloader.php
    M lib/Twig/Compiler.php
    M lib/Twig/CompilerInterface.php
-10 more files modified, choose "v" to view the full list

看来上一个开发人员在供应商内部编辑了很多文件。

为了解决这个问题，我试过了

php composer.phar update <package_name>

但这似乎并不奏效。如何从composer.json中更新/安装一个库?

我正在尝试使用Composer安装包的特定版本。我尝试了composer install和composer require，但他们正在安装最新版本的软件包。如果我想要一个旧版本呢?

我有点搞不懂作曲家这个词。在具有存储库的应用程序中使用的锁。

我看到很多人说我们不应该。从存储库锁定。

如果我在开发环境中更新我的库，我将有一个新的作曲家。锁，但我将无法更新到生产，是吗?

它不会在这个文件上产生冲突吗?

使用PHP Composer从Laravel中删除包的正确方法是什么?

到目前为止，我尝试过:

从文件编写器中删除声明。Json(在“require”部分) 从app.php文件中删除任何类别名 从我的代码中删除对包的任何引用:-) 运行编写器更新 运行composer dump-autoload

这些方法都不管用!我错过了什么?