实际上，如果你设置内存限制为-1(无限)，它应该工作。 例如:

php -d memory_limit=-1 /usr/local/bin/composer update
/usr/bin/php7.1 -d memory_limit=-1 /usr/local/bin/composer update

Composer 2.0预览版现已发布:https://github.com/composer/composer/releases 修正了我的问题。你可以用composer self-update来设置预览

编辑:Composer 2与内存调优发布

跳过内存限制和版本错误使用下面的代码:

COMPOSER_MEMORY_LIMIT=-1 composer require <package-name> --ignore-platform-reqs

这个页面上的选项对我有用

https://www.jesusamieiro.com/php-fatal-error-allowed-memory-size-of-1610612736-bytes-exhausted/

更精确地说，解决方案一:

COMPOSER_MEMORY_LIMIT=-1作曲家更新

在我的例子中，我的作曲家版本是1。X是回溯日期的。 版本升级到2后。X它按预期工作。

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.