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composer安裝與更新常見問(wèn)題及解決方案

composer安裝與更新常見問(wèn)題及解決方案問(wèn)題一：報(bào)錯(cuò)：Your requirements could not be resolved to an installable set of packages.原因：不匹配composer.json要求的版本。解決方案：使用命令 composer install --ignore-platform-reqs composer update --ignore-platform-reqs 設(shè)置忽略版本匹配然后再進(jìn)行安裝或更新你所需要的composer包問(wèn)題二：報(bào)錯(cuò)：Allowed memory size of 2147483648 bytes exhausted (tried to allocate 4096 bytes).原因：php內(nèi)存耗盡報(bào)錯(cuò)解決方案：修改php.ini （改配置）memory_limit = -1 重啟PHP和nginx或者apache。問(wèn)題三：composer更新緩慢原因：用的國(guó)外鏡像解決方案：切換到國(guó)內(nèi)鏡像composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/ 注意：-g是全局，可以去掉-g就是當(dāng)前項(xiàng)目

執(zhí)行 composer update 命令的時(shí)候報(bào) Your requirements could not be resolved to an installable set of packages. 錯(cuò)誤

Your requirements could not be resolved to an installable set of packages.以上原因：不匹配composer.json要求的版本。 解決方案：composer可以設(shè)置忽略版本匹配，composer install --ignore-platform-reqs composer update --ignore-platform-reqs再次執(zhí)行composer命令可以正常安裝包了。