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Laravel5.2常见错误及几觉

RuntimeException in EncryptionServiceProvider.php line 31:

No supported encrypter found. The cipher and / or key length are invalid.

解决办法

在终端中执行:
php artisan key:generate
将生成的key复制到config/app.php替换APP_KEY键值

类似
'key' => env('APP_KEY','C0KtmxaHrPBIvh8SJYWZ58UtJBQ'),

或者直接修改.env文件中的APP_KEY值