PSR-4 describes requirements that must be adhered to for autoloader interoperability in PHP. PSR-4 is an alternative to PSR-0 that corrects problems discovered in real-world use.
Specification link:
Code and test samples:
Questions tagged [psr-4]
308 questions
265
votes
5 answers
What Are the Differences Between PSR-0 and PSR-4?
Recently I've read about namespaces and how they are beneficial. I'm currently creating a project in Laravel and trying to move from class map autoloading to namespacing. However, I can't seem to grasp what the actual difference is between PSR-0 and…
Varun Nath
- 5,570
- 3
- 23
- 39
106
votes
3 answers
A non-empty PSR-4 prefix must end with a namespace separator
I'm trying to setup PSR-4 with Composer but I'm just getting A non-empty PSR-4 prefix must end with a namespace separator.
My autoload in my composer.json looks like this:
"autoload": {
"psr-4": {
"Acme\\models" : "app/models"
…
Marwelln
- 28,492
- 21
- 93
- 117
58
votes
1 answer
class does not comply with psr-4 autoloading standard. Skipping
I try to use composer autoload but I get this error
composer.json
{
"autoload":{
"psr-4":{
"App\\":"app/"
},
"files": ["app/functions/helper.php"]
},
"require": {
"vlucas/phpdotenv": "^2.4",
…
Ahmed Balti
- 581
- 1
- 4
- 3
38
votes
1 answer
Difference between PSR-4 and classmap autoloading?
In regards to Laravel, I got a question about Composer autoloading i.e. the difference between "psr-4" and "classmap" autoloading.
1 difference that I know is PSR-4 does not need repeated dumpautoload for every changes or addition of new files…
RoMo
- 413
- 1
- 6
- 10
32
votes
7 answers
Why use a PSR-0 or PSR-4 autoload in composer if classmap is actually faster?
I understand that you can use either a PSR standard to locate files, or tell composer a directory to scan for classes. The documentation recommends using the PSR-4 standard. There is also an option for composer to create an optimized autoloader,…
Bryan Agee
- 4,924
- 3
- 26
- 42
23
votes
1 answer
Is it possible use multiple classes under the same namespace, in the same file
Is it possible use multiple classes under the same namespace, in the same file? I want to do something like this:
Gligor Florin
- 380
- 1
- 2
- 12
20
votes
1 answer
PSR-4 autoloader Fatal error: Class not found
I have my project structure like so:
src/
├─ Model/
└─ User.php
My User.php file looks like this:
JeremyKirkham
- 1,025
- 2
- 11
- 22
20
votes
1 answer
PSR-4 autoloading with Composer
I run a portail with composer's autoloading class system:
"autoload": {
"psr-4": {
"Portal\\": "src/"
}
}
It works when I run composer.phar dump -o, for instance my class Boostrap is well referenced into…
Fractaliste
- 5,777
- 11
- 42
- 86
17
votes
1 answer
How to create a PSR-4 autoloader for my project?
I am creating a PHP project and want to implement PSR-4 autoloading.
I don't know which files I need to create in the vendor directory to implement autoloading for class files.
Kshitij Verma
- 617
- 1
- 4
- 12
16
votes
5 answers
Laravel error 'ReflectionException' - 'Class App\Http\Kernel does not exist'
I was trying to go live with a laravel project i developped a year back in school and i ran into some issue.
After uploading the whole project on my hosting service's server, i got these errors on my browser as well as on my SSH shell.
Fatal error:…
NicoSalvadore
- 163
- 1
- 2
- 7
13
votes
1 answer
Composer with PSR-4 autoloading: classes from namespace not loading
I have the follow project structure:
- root
|- src <- Application specifc source
|- [...]
|- tests
|- [...]
|- Vendor
|- myusername <- shared packages for all projects
|- src
|- MyNamespace
|- File.php
|- autoload.php
|-…
Gabriel Santos
- 4,934
- 2
- 43
- 74
12
votes
1 answer
How does PSR-4 autoloading work in composer for custom libraries?
I use the following directory structure based on my understanding of how namespaces in PHP work:
project_root
app/
| lib/
| | MyCompany/
| | | Utility/
| | | | Logger.php
| | | Core/
…
Scot Calvin
- 292
- 4
- 14
11
votes
2 answers
Using classes without namespace with Yii2
I want to use Checkout SDK with Yii2 but since this library does not support PSR-4 standards (namespaces) I am having trouble to integrate it. How can I use this library for my purpose?
EDIT
As suggested I tried to use class as
$sale = new…
alwaysLearn
- 6,882
- 7
- 39
- 67
10
votes
2 answers
composer phpunit psr-4 autoload class not found
I am giving composer autoload a try with some phpunit testing classes, and I can't seem to get it to work. When I run phpunit from the command line, I get the following error : "PHP Fatal Error: Class ... not found".
I will give all the structure…
Finglish
- 9,692
- 14
- 70
- 114
9
votes
2 answers
Laravel psr-4 not autoloading
I have a Laravel project that works fine locally (Mavericks), but classes under psr-4 aren't loading on our stage server (CentOS). I'm getting a Reflection "class not found" error every time I try composer update, or run an artisan command.
All my…
Heather Gaye
- 1,118
- 1
- 11
- 19