在bootstrap/app.php
$app = new Illuminate\Foundation\Application( realpath(__DIR__.'/../')
);
实例化 vendor/laravel/framework/src/Illuminate/Foundation/Application.php类 该类的魔术方法
public function __construct($basePath = null)
{
if ($basePath) { $this->setBasePath($basePath);
}
$this->registerBaseBindings();
$this->registerBaseServiceProviders();
$this->registerCoreContainerAliases();
}
查看注册 app 和container到 instances数组中
protected function registerBaseBindings()
{ static::setInstance($this);
$this->instance('app', $this);
$this->instance(Container::class, $this);
}
查看今天主要的方法 instance
流程图
public function instance($abstract, $instance)
{
$this->removeAbstractAlias($abstract);
$isBound = $this->bound($abstract);
unset($this->aliases[$abstract]); // We'll check to determine if this type has been bound before, and if it has
// we will fire the rebound callbacks registered with the container and it
// can be updated with consuming classes that have gotten resolved here.
$this->instances[$abstract] = $instance;
if ($isBound) { $this->rebound($abstract);
}
}
第一个方法 removeAbstractAlias
protected function removeAbstractAlias($searched)
{
if (! isset($this->aliases[$searched])) { return;
}
foreach ($this->abstractAliases as $abstract => $aliases) { foreach ($aliases as $index => $alias) { if ($alias == $searched) { unset($this->abstractAliases[$abstract][$index]);
}
}
}
}
第二个方法: bound
public function bound($abstract)
{ return isset($this->bindings[$abstract]) || isset($this->instances[$abstract]) || $this->isAlias($abstract);
}
第三个方法: rebound
protected function rebound($abstract)
{
$instance = $this->make($abstract);
foreach ($this->getReboundCallbacks($abstract) as $callback) { call_user_func($callback, $this, $instance);
}
}