<?php
namespace Illuminate\Container;
use Illuminate\Contracts\Container\ContextualBindingBuilder as ContextualBindingBuilderContract;
class ContextualBindingBuilder implements ContextualBindingBuilderContract
{
/**
* The underlying container instance.
*
* @var \Illuminate\Container\Container
*/
protected $container;// The underlying container instance
/**
* The concrete instance.
*
* @var string
*/
protected $concrete;// a instance about concrete
/**
* The abstract target.
*
* @var string
*/
protected $needs;// a target about the abstract
/**
* Create a new contextual binding builder.
*
* @param \Illuminate\Container\Container $container
* @param string $concrete
* @return void
*/
public function __construct(Container $container, $concrete)
{
$this->concrete = $concrete;
$this->container = $container;// set the
}
/**
* Define the abstract target that depends on the context.
*
* @param string $abstract
* @return $this
*/
public function needs($abstract)
{
$this->needs = $abstract;
return $this;
}// function is needs
/**
* Define the implementation for the contextual binding.
*
* @param \Closure|string $implementation
* @return void
*/
public function give($implementation)
{
$this->container->addContextualBinding($this->concrete, $this->needs, $implementation);
}// Define the implementation for the contextual binding
}本文出自 “专注php” 博客，请务必保留此出处http://jingshanls.blog.51cto.com/3357095/1785393
每天laravel-20160820| ContextualBinding
原文：http://jingshanls.blog.51cto.com/3357095/1785393