PHP Fatal error: Allowed memory

今天在使用composer安装扩展包的时候，报了如下的错误，记录一下解决的方法。

一、报错如下

/var/www/html/backend # composer require swooletw/laravel-swoole
Warning from https://mirrors.aliyun.com/composer: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Using version ^2.6 for swooletw/laravel-swoole
./composer.json has been updated
Loading composer repositories with package information
Warning from https://mirrors.aliyun.com/composer: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Updating dependencies (including require-dev)
PHP Fatal error:  Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleSetGenerator.php on line 129

Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleSetGenerator.php on line 129

Check https://getcomposer.org/doc/articles/troubleshooting.md#memory-limit-errors for more info on how to handle out of memory errors./var/www/html/backend # 

二、解决方法

1.方法一：修改php.ini里面的memory_limit的值为 -1

vim /etc/php.ini

; Maximum amount of memory a script may consume  
; http://php.net/memory-limit      
memory_limit = -1
                                                                   
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;                                              
; Error handling and logging ;                                       
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;  

2.方法二：用如下命令安装

php -d memory_limit=-1 /usr/local/bin/composer  require xxx/xxx
#/usr/local/bin/composer是composer的安装路径

三、备注

1.本文参考：https://www.cnblogs.com/wjcms/p/13771343.html