Filesystem configuration in Laravel - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the default disk used by Laravel's filesystem?

Given the default Laravel filesystem configuration, which disk will be used when calling Storage::disk() without any parameters?

A "public"

B "s3"

C "local"

D "ftp"

💡 Hint

Check the config/filesystems.php file for the default key.

Laravel's default filesystem disk is set to "local" in the config/filesystems.php file under the default key unless changed.

📝 Syntax

intermediate

Which configuration snippet correctly defines an S3 disk in Laravel?

Select the correct Laravel filesystem configuration array for an S3 disk.

A "s3" => ["driver" => "local", "key" => env("AWS_ACCESS_KEY_ID"), "secret" => env("AWS_SECRET_ACCESS_KEY"), "region" => env("AWS_DEFAULT_REGION"), "bucket" => env("AWS_BUCKET")]

B "s3" => ["driver" => "ftp", "key" => env("AWS_ACCESS_KEY_ID"), "secret" => env("AWS_SECRET_ACCESS_KEY"), "region" => env("AWS_DEFAULT_REGION"), "bucket" => env("AWS_BUCKET")]

C ])"TEKCUB_SWA"(vne >= "tekcub" ,)"NOIGER_TLUAFED_SWA"(vne >= "noiger" ,)"YEK_SSECCA_TERCES_SWA"(vne >= "terces" ,)"DI_YEK_SSECCA_SWA"(vne >= "yek" ,"3s" >= "revird"[ >= "3s"

D "s3" => ["driver" => "s3", "key" => env("AWS_ACCESS_KEY_ID"), "secret" => env("AWS_SECRET_ACCESS_KEY"), "region" => env("AWS_DEFAULT_REGION"), "bucket" => env("AWS_BUCKET")]

💡 Hint

The driver for S3 must be exactly "s3" and keys must be named correctly.

The correct S3 disk configuration uses the "s3" driver and environment variables for key, secret, region, and bucket. Using "ftp" or "local" as driver or wrong key names will cause errors.

🔧 Debug

advanced

Why does this Laravel filesystem configuration cause an error?

Consider this snippet from config/filesystems.php:

"disks" => [
  "backup" => [
    "driver" => "local",
    "root" => storage_path("app/backups")
  ]
]

When trying to store a file using Storage::disk('backup')->put('file.txt', 'data');, an error occurs. What is the most likely cause?

A The <code>storage/app/backups</code> directory does not exist and the local driver <code>put()</code> method does not automatically create directories.

B The <code>root</code> path must be an absolute path string, not a function call.

C The <code>driver</code> value "local" is invalid and should be "filesystem".

D The disk name "backup" is reserved and cannot be used.

💡 Hint

Consider whether the put() method creates necessary directories if they don't exist.

When using the local driver, the put() method writes directly to the computed path under the root. The root is storage/app/backups, but the backups directory does not exist by default, causing a "No such file or directory" error. Use Storage::disk('backup')->makeDirectory(''); first or methods like putFile() that create directories.

❓ state_output

advanced

What is the output of this Laravel filesystem code snippet?

Given the following code snippet, what will be the output?

use Illuminate\Support\Facades\Storage;

Storage::fake('avatars');
Storage::disk('avatars')->put('user1.png', 'imagecontent');

return Storage::disk('avatars')->exists('user1.png') ? 'Found' : 'Not Found';

A Syntax error due to missing import

B "Found"

C Runtime error because fake disk is not writable

D "Not Found"

💡 Hint

The Storage::fake() method creates a temporary disk for testing.

The Storage::fake('avatars') method creates a fake disk that stores files in memory for testing. The file is put successfully and exists() returns true, so output is "Found".

🧠 Conceptual

expert

How does Laravel determine the URL for a file stored on the "public" disk?

Laravel's "public" disk is configured with driver => "local" and root => storage_path('app/public'). How does Laravel generate the public URL for a file stored on this disk when calling Storage::disk('public')->url('file.jpg')?

A It returns the URL by prefixing the file path with the value of the <code>APP_URL</code> environment variable plus "/storage/" because the <code>public/storage</code> folder is linked to <code>storage/app/public</code>.

B It returns the absolute file system path on the server where the file is stored.

C It returns a signed temporary URL valid for 5 minutes by default.

D It returns the URL by prefixing the file path with "/public/" directly without considering environment variables.

💡 Hint

Think about the symbolic link created by php artisan storage:link.

Laravel's public disk stores files in storage/app/public. The php artisan storage:link command creates a symbolic link from public/storage to this folder. The url() method returns the URL by combining APP_URL and "/storage/" plus the file path.