composer loader后面那个大数字是什么意思啊？
似乎是laravel框架里的。
ComposerAutoloaderInitd81cf63d5f709fc6e7b7149653e33251
回复内容：
似乎是laravel框架里的。
ComposerAutoloaderInitd81cf63d5f709fc6e7b7149653e33251
作用应该是保证composer类加载的一致性
Composer 是一个包依赖管理工具, 它同时提供了一个类自动加载器， 这个加载器会按照composer.json里的配置以及各个依赖包中的composer.json的配置来加载PHP类。
"ComposerAutoloaderInitd81cf63d5f709fc6e7b7149653e33251" 后面那一大串数字是由composer自动生成的一个类, 其代码在 vendor/composer/autoload_real.php 中。这串32个字母的字符串其实是composer每次更新后自动生成的MD5值，作用应该是保证composer类加载的一致性，一旦因为一些意外原因导致MD5值不一样了，那么类自动加载自然就失败了， 而不会貌似“良好”的使用旧版本工作。
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