由于之前的答案都不包括set，所以我花了一点时间来弄清楚如何在Windows中做到这一点而不改变php.ini，但下面是对我有效的方法:

set COMPOSER_MEMORY_LIMIT=-1
composer require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

要获取当前的memory_limit值，运行:

php -r "echo ini_get('memory_limit').PHP_EOL;"

尝试增加php.ini文件中的限制(例如/etc/php5/cli/php.ini对于debian类系统):

; Use -1 for unlimited or define an explicit value like 2G
memory_limit = -1

或者，你可以用命令行参数增加限制:

php -d memory_limit=-1 composer.phar require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

要加载php.ini文件，请尝试:

php --ini

另一个快速解决方案:

php composer.phar COMPOSER_MEMORY_LIMIT=-1 require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

或者是:

COMPOSER_MEMORY_LIMIT=-1 composer require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

Here is another way to solve this problem under windows, if you use Wampserver. Indeed at the level of wampserver, there are two php.ini files, that of PHP, which one can find in the location C: \ wamp64 \ bin \ php \ phpx.xx \ php.ini and that of Apache , which can be found at location C: \ wamp64 \ bin \ apache \ apachex.xx \ bin \ php.ini. Both of these files have the memory_limit parameter. So to be sure to solve this problem, it is better to set the memory_limit = -1 parameter in both files at once.

如果增加内存限制没有帮助或您没有太多内存

在另一台高内存的机器上

将composer的内存限制设置为-1 删除作曲家。锁文件 运行composer install 提交作曲家。锁定文件到您的回购 然后在服务器上运行composer install

这个想法是在计算/创建composer时使用了大部分内存。锁文件，如果它的创建/就绪- composer安装将不会使用太多内存。

同样的问题，没有任何与“memory_limit”相关的工作，但是..

composer self-update --2

．．解决了我的问题。(升级:1.10.17 -> 2.0.4)

Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleWatchGraph.php on line 52 Check https://getcomposer.org/doc/articles/troubleshooting.md#memory-limit-errors for more info on how to handle out of memory errors.

Set memory_limit to -1 works for me;) (vim /etc/php/7.2/cli/php.ini)