A. For using other classes methods and properties in a class a project. One way is to first include them by "include "class file name.php" and then use it
B. Then there comes a concept of SQL autoload register this function runs when a class is not found on object creation. So when writing generic code, this function can be used to load any class of the project anywhere,
C. Now, with PSR-4. If we are maintaining the project with the composer and envisioning third-party integration with the project We can use PSR-4 for Autoloading the classes and namespaces
D. PSR-4, through composer.json. Inside vendor autoload file gets created and which loads another class to implement what spl_autoload_register does in a more robust way.
i. Example: spl_autoload_register ('Autoload'); function
my Autoloader ($class Name) { $path %3D '/path/to/class/';
include $path.$className.'.php'; }
//- ----------------------- $myclass = new MyClass () ;
E. How: In the composer.json file, specify the pattern for the namespace in the autoload section.
"autoload": {
"psr-4": {
"Drupal\\Core\\": "lib/Drupal/Core",
"Drupal\\Component\\": "lib/Drupal/Component",
"Drupal\\Driver\\": "./drivers/lib/Drupal/Driver"
},
}, F. Drupal uses the PSR-4 standard for autoloading.
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