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registerProvider.html
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registerProvider.html
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<!DOCTYPE html>
<html class="theme-next gemini" lang="zh-Hans">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<script src="//cdn.bootcss.com/pace/1.0.2/pace.min.js"></script>
<link href="//cdn.bootcss.com/pace/1.0.2/themes/pink/pace-theme-flash.css" rel="stylesheet">
<style>
.pace .pace-progress {
background: #1E92FB; /*进度条颜色*/
height: 3px;
}
.pace .pace-progress-inner {
box-shadow: 0 0 10px #1E92FB, 0 0 5px #1E92FB; /*阴影颜色*/
}
.pace .pace-activity {
border-top-color: #1E92FB; /*上边框颜色*/
border-left-color: #1E92FB; /*左边框颜色*/
}
</style>
<meta name="theme-color" content="#222">
<script src="/lib/pace/pace.min.js?v=1.0.2"></script>
<link href="/lib/pace/pace-theme-minimal.min.css?v=1.0.2" rel="stylesheet">
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />
<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />
<link href="/css/main.css?v=5.1.4" rel="stylesheet" type="text/css" />
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=5.1.4">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png?v=5.1.4">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png?v=5.1.4">
<link rel="mask-icon" href="/images/logo.svg?v=5.1.4" color="#222">
<meta name="keywords" content="laravel服务注册" />
<meta name="description" content="laravel服务提供者注册流程">
<meta name="keywords" content="laravel服务注册">
<meta property="og:type" content="article">
<meta property="og:title" content="registerProvider">
<meta property="og:url" content="http://blog.uncocity.com/registerProvider.html">
<meta property="og:site_name" content="laravel源码学习">
<meta property="og:description" content="laravel服务提供者注册流程">
<meta property="og:locale" content="zh-Hans">
<meta property="og:updated_time" content="2018-08-03T15:43:41.477Z">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="registerProvider">
<meta name="twitter:description" content="laravel服务提供者注册流程">
<script type="text/javascript" id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Gemini',
version: '5.1.4',
sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":false,"onmobile":false},
fancybox: true,
tabs: true,
motion: {"enable":false,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
duoshuo: {
userId: '0',
author: '博主'
},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<link rel="canonical" href="http://blog.uncocity.com/registerProvider.html"/>
<title>registerProvider | laravel源码学习</title>
</head>
<body itemscope itemtype="http://schema.org/WebPage" lang="zh-Hans">
<div class="container sidebar-position-left page-post-detail">
<div class="headband"></div>
<a href="https://your-url" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-wrapper">
<div class="site-meta ">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">laravel源码学习</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<h1 class="site-subtitle" itemprop="description"></h1>
</div>
<div class="site-nav-toggle">
<button>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section">
<i class="menu-item-icon fa fa-fw fa-home"></i> <br />
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<a href="/tags/" rel="section">
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</a>
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<a href="/categories/" rel="section">
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</a>
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<a href="/archives/" rel="section">
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<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="http://blog.uncocity.com/registerProvider.html">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="mey">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/avatar.jpg">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="laravel源码学习">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">registerProvider</h2>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="创建于" itemprop="dateCreated datePublished" datetime="2018-07-11T22:26:19+08:00">
2018-07-11
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
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<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/laravel源码学习分享/" itemprop="url" rel="index">
<span itemprop="name">laravel源码学习分享</span>
</a>
</span>
</span>
<span id="/registerProvider.html" class="leancloud_visitors" data-flag-title="registerProvider">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-eye"></i>
</span>
<span class="post-meta-item-text">阅读次数:</span>
<span class="leancloud-visitors-count"></span>
</span>
<div class="post-wordcount">
<span class="post-meta-item-icon">
<i class="fa fa-file-word-o"></i>
</span>
<span class="post-meta-item-text">字数统计:</span>
<span title="字数统计">
1,063
</span>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-clock-o"></i>
</span>
<span class="post-meta-item-text">阅读时长 ≈</span>
<span title="阅读时长">
5
</span>
</div>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<div class="note success"><p>框架bootstrap过程之 registerProvider。这里包括即时注册、延时注册、和事件注册服务。</p></div>
<p>为所有已存在的服务提供者进行统一注册<br><figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//Illuminate\Foundation\Bootstrap\RegisterProviders</span></span><br><span class="line"><span class="keyword">public</span> <span class="function"><span class="keyword">function</span> <span class="title">bootstrap</span><span class="params">(Application $app)</span></span></span><br><span class="line"><span class="function"></span>{ </span><br><span class="line"> $app->registerConfiguredProviders();</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">// Illuminate\Foundation\Application</span></span><br><span class="line"> <span class="keyword">public</span> <span class="function"><span class="keyword">function</span> <span class="title">registerConfiguredProviders</span><span class="params">()</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> $manifestPath = <span class="keyword">$this</span>->getCachedServicesPath();</span><br><span class="line"></span><br><span class="line"> (<span class="keyword">new</span> ProviderRepository(<span class="keyword">$this</span>, <span class="keyword">new</span> Filesystem, $manifestPath))</span><br><span class="line"> ->load(<span class="keyword">$this</span>->config[<span class="string">'app.providers'</span>]);</span><br><span class="line">}</span><br></pre></td></tr></table></figure><br>首先获取需要注册的服务提供者的清单， 先读取服务提供者清单缓存，文件是位于root/bootstrap/cache下的services.json。<br> providers保存所有需要注册的服务(config/app.php里的providers)<br> eager保存即时注册的服务<br> deferred保存需要延时注册服务<br> when 保存需要条件才注册的服务<br><a id="more"></a><br><figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> <span class="attr">"providers"</span>: [ ],</span><br><span class="line"> <span class="attr">"eager"</span>: [],</span><br><span class="line"> <span class="attr">"deferred"</span>: [],</span><br><span class="line"> <span class="attr">"when"</span>: [],</span><br><span class="line">}</span><br></pre></td></tr></table></figure><br>ProviderRepository作为保存服务提供者的仓库类，接收了三个参数 app实例, 文件操作类实例, providers缓存清单。<br><figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="function"><span class="keyword">function</span> <span class="title">load</span><span class="params">(array $providers)</span></span></span><br><span class="line"><span class="function"> </span>{</span><br><span class="line"> $manifest = <span class="keyword">$this</span>->loadManifest();</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">$this</span>->shouldRecompile($manifest, $providers)) {</span><br><span class="line"> $manifest = <span class="keyword">$this</span>->compileManifest($providers);</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//读取when 数组</span></span><br><span class="line"> <span class="keyword">foreach</span> ($manifest[<span class="string">'when'</span>] <span class="keyword">as</span> $provider => $events) {</span><br><span class="line"> <span class="keyword">$this</span>->registerLoadEvents($provider, $events);</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//读取eager数组</span></span><br><span class="line"> <span class="keyword">foreach</span> ($manifest[<span class="string">'eager'</span>] <span class="keyword">as</span> $provider) {</span><br><span class="line"> <span class="keyword">$this</span>->app->register(<span class="keyword">$this</span>->createProvider($provider));</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//读取deferred数组</span></span><br><span class="line"> <span class="keyword">$this</span>->app->addDeferredServices($manifest[<span class="string">'deferred'</span>]);</span><br><span class="line"> }</span><br></pre></td></tr></table></figure><br>首先通过loadManifest方法读取缓存清单，并通过json_decode转成数组,再通过数组合并array_merge([‘when’=>[]], $manifest),如果原缓存清单没有when数组则添加。<br>然后通过对比config/app下的providers数组与清单里的providers数组是否一致，来决定是否重新编译。若框架初次运行，肯定是要编译的。所以关注点也在于编译清单的compileManifest方法</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">protected</span> <span class="function"><span class="keyword">function</span> <span class="title">compileManifest</span><span class="params">($providers)</span></span></span><br><span class="line"><span class="function"> </span>{</span><br><span class="line"> $manifest = <span class="keyword">$this</span>->freshManifest($providers);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">foreach</span> ($providers <span class="keyword">as</span> $provider) {</span><br><span class="line"> <span class="comment">//获取具体服务提供者实例</span></span><br><span class="line"> <span class="comment">//$instance = new $provider(app);</span></span><br><span class="line"> $instance = <span class="keyword">$this</span>->createProvider($provider);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> ($instance->isDeferred()) {</span><br><span class="line"> <span class="keyword">foreach</span> ($instance->provides() <span class="keyword">as</span> $service) {</span><br><span class="line"> $manifest[<span class="string">'deferred'</span>][$service] = $provider;</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">// 使用基类ServierProvider的when方法，返回空数组[]</span></span><br><span class="line"> $manifest[<span class="string">'when'</span>][$provider] = $instance->when();</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">else</span> {</span><br><span class="line"> $manifest[<span class="string">'eager'</span>][] = $provider;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">$this</span>->writeManifest($manifest);</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//获取初始化数组</span></span><br><span class="line"> <span class="keyword">protected</span> <span class="function"><span class="keyword">function</span> <span class="title">freshManifest</span><span class="params">(array $providers)</span></span></span><br><span class="line"><span class="function"> </span>{</span><br><span class="line"> <span class="keyword">return</span> [<span class="string">'providers'</span> => $providers, <span class="string">'eager'</span> => [], <span class="string">'deferred'</span> => []];</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
<p>首先通过freshManifest获取初始化的默认数组，然后对配置中的providers数组进行循环遍历处理。根据具体类的属性，最终生成想要的清单。<br>这里假设$provides 只有两个 Illuminate\Auth\AuthServiceProvider 和 Illuminate\Cache\CacheServiceProvider，作为例子。<br>获取服务提供者实例，根据其deffer属性判断是否为需要延迟注册的服务。如果不是，则存入eager对应的数组中。<br><figure class="highlight scala"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//没有deffer=true属性 </span></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">AuthServiceProvider</span> <span class="keyword">extends</span> <span class="title">ServiceProvider</span></span></span><br><span class="line"><span class="class"></span>{</span><br><span class="line"></span><br><span class="line">}</span><br><span class="line"><span class="comment">//延时加载</span></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">CacheServiceProvider</span> <span class="keyword">extends</span> <span class="title">ServiceProvider</span></span></span><br><span class="line"><span class="class"></span>{</span><br><span class="line"> <span class="keyword">protected</span> $defer = <span class="literal">true</span>; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><br>例子中编译好的清单$manifest就是下面这样的,接着执行writeManifest方法，将清单写入缓存server.json<br><figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> <span class="attr">"providers"</span>: [ </span><br><span class="line"> <span class="string">"Illuminate\\Auth\\AuthServiceProvider"</span>,</span><br><span class="line"> <span class="string">"Illuminate\\Cache\\CacheServiceProvider"</span>,</span><br><span class="line"> ],</span><br><span class="line"> <span class="attr">"eager"</span>: [</span><br><span class="line"> <span class="string">"Illuminate\\Auth\\AuthServiceProvider"</span>,</span><br><span class="line"> ],</span><br><span class="line"> <span class="attr">"deferred"</span>: [</span><br><span class="line"> <span class="string">"Illuminate\\Cache\\CacheServiceProvider"</span>,</span><br><span class="line"> ],</span><br><span class="line"> <span class="attr">"when"</span>: {</span><br><span class="line"> <span class="attr">"Illuminate\\Cache\\CacheServiceProvider"</span>: [],</span><br><span class="line"> },</span><br><span class="line">}</span><br></pre></td></tr></table></figure><br>继续看上面的load方法<br>1.读取eager数组的直接执行app->regisert(provider实例);</p>
<p>2.读取when数组,比如我们重写CacheServiceProvider的when方法, 返回如下的数组<br><figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//</span></span><br><span class="line">{</span><br><span class="line"> <span class="string">"when"</span>: {</span><br><span class="line"> <span class="comment">// 可以多个事件</span></span><br><span class="line"> <span class="string">"Illuminate\\Cache\\CacheServiceProvider"</span>: [<span class="string">'test_cache_when1'</span>,<span class="string">'test_cache_when2'</span>],</span><br><span class="line"> },</span><br><span class="line">}</span><br><span class="line"><span class="comment">//</span></span><br><span class="line"><span class="keyword">protected</span> <span class="function"><span class="keyword">function</span> <span class="title">registerLoadEvents</span><span class="params">($provider, array $events)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="keyword">if</span> (count($events) < <span class="number">1</span>) {</span><br><span class="line"> <span class="keyword">return</span>;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> $app = <span class="keyword">$this</span>->app;</span><br><span class="line"> <span class="comment">//注册事件监听者</span></span><br><span class="line"> $app->make(<span class="string">'events'</span>)->listen($events, <span class="function"><span class="keyword">function</span> <span class="params">()</span> <span class="title">use</span> <span class="params">($app, $provider)</span> </span>{</span><br><span class="line"> $app->register($provider);</span><br><span class="line"> });</span><br><span class="line">}</span><br></pre></td></tr></table></figure><br>这里的实质就是注册事件回调，当我们执行event()->fire(‘test_cache_when1’), 或者event()->fire(‘test_cache_when2’)就会触发事件回调，将对应的provider进行注册。</p>
<p>3.读取deffer数组 ,这里把延时服务数组赋值给app类的deferredServices属性,真正的注册则是在执行app的make方法时实现的。<br><figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// application类</span></span><br><span class="line"><span class="keyword">public</span> <span class="function"><span class="keyword">function</span> <span class="title">addDeferredServices</span><span class="params">(array $services)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="keyword">$this</span>->deferredServices = array_merge(<span class="keyword">$this</span>->deferredServices, $services);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="function"><span class="keyword">function</span> <span class="title">make</span><span class="params">($abstract, array $parameters = [])</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> ...</span><br><span class="line"> <span class="comment">//如果延时服务存在，那么在make之前进行注册</span></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">isset</span>(<span class="keyword">$this</span>->deferredServices[$abstract])) {</span><br><span class="line"> <span class="keyword">$this</span>->loadDeferredProvider($abstract);</span><br><span class="line"> }</span><br><span class="line"> ...</span><br><span class="line">} </span><br></pre></td></tr></table></figure><br>所谓服务注册无非是为容器绑定一个可以返回所需实例的闭包，而实际使用中，除了app启动时必须实例外(如router)，只有需要用到的对应实例，才进行闭包绑定，然后再通过容器make。</p>
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