PHP Packages

config.php

<?php
require 'autoload.php';

$someObject = new Vendor\Package\SomeClass(); // autoloader tries to load... what exactly??? need to load vendor package.php somehow

index.php

<?php
require 'autoload.php';

use Vendor\Package\*; // this loads package, calls Vendor\Package\__init() and imports known public symbols

echo Vendor\Package::package; // 'Vendor\Package'

new Vendor\Package(); // throws fatal error while it's not a class

my_function();

echo my_function::function; // 'Vendor\Package\my_function'
echo my_function::package; // 'Vendor\Package'

$myObject = new MyClass();
$myOtherObject = new MyOtherClass();
$myNonExistingClass new Vendor\Package\NonExistingClass(); // throws fatal error, class not found
$myPrivateClass = new MyPrivateClass(); // throws fatal error, class not found

$myPublicObject = new MyPublicClass(); // 'Hello <Vendor\Package\MyPublicClass inside Vendor\Package>'

package.php

<?php
package Vendor\Package;

public class MyClass, MyOtherClass; // those two classes will be imported by default using *
public function my_function; // this function will be imported by default using *

// this is called at first attempt to the package
public function __init()
{
    if (extension_loaded('spl')) {
        throw Exception(self::package . ' highly depends on "spl" extension which is not loaded');
    }
    if (package_exists(\Symfony\Component\Console::package)) {
        throw Exception(self::package . ' highly depends on "symfony/console" package which is available');
    }
    // register package loader
    (new Psr4Loader())->add(self::package, 'src')->register();
    require __DIR__ . '/src/functions.php'; // import some symbols
    require __DIR__ . '/src/SomeBunchOfClasses.php'; // import some class symbols
}

// this class will be imported by default using *
public class MyPublicClass
{
    public function __construct()
    {
        echo 'Hello <' . self::class . ' inside ' . self::package . '>';
    }
}

// this class won't be imported and won't be accessible outside package
private class MyPrivateClass
{
}

src_SomeClass.php

<?php
package Vendor\Package; // this autoloads package and calls Vendor\Package\__init()

// class is not marked as private so it'll be public by default
class SomeClass
{
}