Laravel fopen() 无法创建/读取文件
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/45353458/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Laravel fopen() cant create/read file
提问by Dimitrios Stefos
so I have this Laravel project and I want to export an array to a json file to use it later. My permissions on the storage folder are 777 but when I do
所以我有这个 Laravel 项目，我想将一个数组导出到一个 json 文件以供以后使用。我对存储文件夹的权限是 777 但是当我这样做时
$line=[
'key1'=>'value1',
];
file_put_contents("storage/app/test.json",json_encode($line));
I also tried
我也试过
$line=[
'key1'=>'value1',
];
file_put_contents($_SERVER['DOCUMENT_ROOT']."/storage/app/test.json",json_encode($line));
and in both cases (plus some more) I get this error
在这两种情况下（加上更多）我都会收到这个错误
file_put_contents(storage/app/test.json): failed to open stream: No such file or directory
Do you have any idea why is this happening?
你知道为什么会这样吗？
EDIT: The folders exist
编辑：文件夹存在
回答by Bibhudatta Sahoo
You are working with storagefolder but by default the path takes from publicthat why you need to use ../
Try like this
您正在使用存储文件夹，但默认情况下，路径来自公共，这就是为什么您需要使用这样的 ../
尝试
$file=fopen('../storage/app/test.json','w');
fwrite($file,json_encode($line));
fclose($file);
回答by Grey
You can use Laravel File Storage
您可以使用Laravel 文件存储
回答by user3785966
You can use Laravel's helper method base_path():
你可以使用 Laravel 的辅助方法 base_path()：
The base_path function returns the fully qualified path to the project root.
base_path 函数返回项目根目录的完全限定路径。
Eg:
例如：
$fp = fopen(base_path() . 'app/Encryption/PrivateKeys/nginx-selfsigned.key','r');
回答by ebraley
Your directories have to exist before attempting to put files in them, regardless of permissions. I assume that's what is occurring. Likewise your permissions may be set on the storagefolder, but not the appfolder.
无论权限如何，在尝试将文件放入目录之前，您的目录都必须存在。我认为这就是正在发生的事情。同样，您的权限可能是在storage文件夹上设置的，但不是在app文件夹上。
