yii ソースコード分析 1、yii ソースコード分析_PHP チュートリアル-PHPチュートリアル-php.cn

yii源码分析1，yii源码分析

ホームページ

バックエンド開発

PHPチュートリアル

yii ソースコード分析 1、yii ソースコード分析_PHP チュートリアル

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 13, 2016 am 10:14 AM

yii

yii源码分析1，yii源码分析

转载请注明：TheViper http://www.cnblogs.com/TheViper/

本文将对yii中的mvc,路由器，filter,组件机制等最主要的部分进行自己的一点浅析，力求说明自己做一个php mvc不是那么的遥不可及，其实是很简单的。

源码基于yii 1.13,为了方便说明，我对其进行了大量的裁剪，不过还是让他保有上面的那些最重要的功能。裁剪下来，其实没有几个文件了，而且每个文件代码最多100多行，避免因为代码太多而懒得看。

所谓的mvc都是让所有请求从一个地方进去，通过对请求，配置的解析，分发到对应的类方法中。

首先当然是入口文件，index.php.

<span>1</span> <?<span>php
</span><span>2</span> <span>$app</span> = "app"<span>;
</span><span>3</span> <span>$yii</span> = <span>dirname</span> ( <span>__FILE__</span> ) . '/framework/yii.php'<span>;
</span><span>4</span> <span>$config</span> = <span>dirname</span> ( <span>__FILE__</span> ) . '/app/protected/config/main.php';<span>//</span><span>载入配置</span>
<span>5</span> <span>require_once</span> (<span>$yii</span><span>);
</span><span>6</span> Yii::createWebApplication ( <span>$config</span> )->run ();

ログイン後にコピー

引入yii.php

<span>1</span> <?<span>php
</span><span>2</span> <span>define</span> ( "VIEWS_DIR", "<span>$app</span>/protected/views/"<span> );
</span><span>3</span> <span>define</span> ( "CONTROLLERS_DIR", "<span>$app</span>/protected/controllers/"<span> );
</span><span>4</span> <span>require</span>(<span>dirname</span>(<span>__FILE__</span>).'/YiiBase.php'<span>);
</span><span>5</span> <span>class</span> Yii <span>extends</span><span> YiiBase
</span><span>6</span> <span>{
</span><span>7</span> }

ログイン後にコピー

原来yii是个空的类啊，去看YiiBase.

<span>  1</span> <?<span>php
</span><span>  2</span> <span>defined</span> ( 'YII_PATH' ) or <span>define</span> ( 'YII_PATH', <span>dirname</span> ( <span>__FILE__</span><span> ) );
</span><span>  3</span> <span>class</span><span> YiiBase {
</span><span>  4</span>     <span>public</span> <span>static</span> <span>$classMap</span> = <span>array</span><span> ();
</span><span>  5</span>     <span>public</span> <span>static</span> <span>$enableIncludePath</span> = <span>true</span><span>;
</span><span>  6</span>     <span>private</span> <span>static</span> <span>$_aliases</span> = <span>array</span><span> (
</span><span>  7</span>             'system' =><span> YII_PATH 
</span><span>  8</span>     ); <span>//</span><span> alias => path</span>
<span>  9</span>     <span>private</span> <span>static</span> <span>$_imports</span> = <span>array</span> (); <span>//</span><span> alias => class name or directory</span>
<span> 10</span>     <span>private</span> <span>static</span> <span>$_includePaths</span>; <span>//</span><span> list of include paths</span>
<span> 11</span>     <span>private</span> <span>static</span> <span>$_app</span><span>;
</span><span> 12</span>     <span>private</span> <span>static</span> <span>$_logger</span><span>;
</span><span> 13</span>     <span>public</span> <span>static</span> <span>function</span> createWebApplication(<span>$config</span> = <span>null</span><span>) {
</span><span> 14</span>         <span>return</span> self::createApplication ( 'CWebApplication', <span>$config</span><span> );
</span><span> 15</span> <span>    }
</span><span> 16</span>     <span>public</span> <span>static</span> <span>function</span> createApplication(<span>$class</span>, <span>$config</span> = <span>null</span><span>) {
</span><span> 17</span>         <span>return</span> <span>new</span> <span>$class</span> ( <span>$config</span><span> );
</span><span> 18</span> <span>    }
</span><span> 19</span>     <span>public</span> <span>static</span> <span>function</span><span> app() {
</span><span> 20</span>         <span>return</span> self::<span>$_app</span><span>;
</span><span> 21</span> <span>    }
</span><span> 22</span>     <span>//</span><span>别名路径</span>
<span> 23</span>     <span>public</span> <span>static</span> <span>function</span> getPathOfAlias(<span>$alias</span><span>) {
</span><span> 24</span>         <span>if</span> (<span>isset</span> ( self::<span>$_aliases</span> [<span>$alias</span><span>] ))
</span><span> 25</span>             <span>return</span> self::<span>$_aliases</span> [<span>$alias</span><span>];
</span><span> 26</span>         <span>elseif</span> ((<span>$pos</span> = <span>strpos</span> ( <span>$alias</span>, '.' )) !== <span>false</span><span>) {
</span><span> 27</span>             <span>$rootAlias</span> = <span>substr</span> ( <span>$alias</span>, 0, <span>$pos</span><span> );
</span><span> 28</span>             <span>if</span> (<span>isset</span> ( self::<span>$_aliases</span> [<span>$rootAlias</span><span>] ))
</span><span> 29</span>                 <span>return</span> self::<span>$_aliases</span> [<span>$alias</span>] = <span>rtrim</span> ( self::<span>$_aliases</span> [<span>$rootAlias</span>] . DIRECTORY_SEPARATOR . <span>str_replace</span> ( '.', DIRECTORY_SEPARATOR, <span>substr</span> ( <span>$alias</span>, <span>$pos</span> + 1 ) ), '*' .<span> DIRECTORY_SEPARATOR );
</span><span> 30</span> <span>        }
</span><span> 31</span>         <span>return</span> <span>false</span><span>;
</span><span> 32</span> <span>    }
</span><span> 33</span>     <span>public</span> <span>static</span> <span>function</span> setPathOfAlias(<span>$alias</span>, <span>$path</span><span>) {
</span><span> 34</span>         <span>if</span> (<span>empty</span> ( <span>$path</span><span> ))
</span><span> 35</span>             <span>unset</span> ( self::<span>$_aliases</span> [<span>$alias</span><span>] );
</span><span> 36</span>         <span>else</span>
<span> 37</span>             self::<span>$_aliases</span> [<span>$alias</span>] = <span>rtrim</span> ( <span>$path</span>, '\\/'<span> );
</span><span> 38</span> <span>    }
</span><span> 39</span>     <span>public</span> <span>static</span> <span>function</span> setApplication(<span>$app</span><span>) {
</span><span> 40</span>         <span>if</span> (self::<span>$_app</span> === <span>null</span> || <span>$app</span> === <span>null</span><span>)
</span><span> 41</span>             self::<span>$_app</span> = <span>$app</span><span>;
</span><span> 42</span> <span>    }
</span><span> 43</span>     <span>public</span> <span>static</span> <span>function</span> import(<span>$alias</span>, <span>$forceInclude</span> = <span>false</span><span>) {
</span><span> 44</span>         <span>if</span> (<span>isset</span> ( self::<span>$_imports</span> [<span>$alias</span>] )) <span>//</span><span> previously imported</span>
<span> 45</span>             <span>return</span> self::<span>$_imports</span> [<span>$alias</span><span>];
</span><span> 46</span>         
<span> 47</span>         <span>if</span> (<span>class_exists</span> ( <span>$alias</span>, <span>false</span> ) || <span>interface_exists</span> ( <span>$alias</span>, <span>false</span><span> ))
</span><span> 48</span>             <span>return</span> self::<span>$_imports</span> [<span>$alias</span>] = <span>$alias</span><span>;
</span><span> 49</span>         <span>if</span> ((<span>$pos</span> = <span>strrpos</span> ( <span>$alias</span>, '.' )) === <span>false</span>)         <span>//</span><span> a simple class name</span>
<span> 50</span> <span>        {
</span><span> 51</span>             <span>//</span><span> try to autoload the class with an autoloader if $forceInclude is true</span>
<span> 52</span>             <span>if</span> (<span>$forceInclude</span> && (Yii::autoload ( <span>$alias</span>, <span>true</span> ) || <span>class_exists</span> ( <span>$alias</span>, <span>true</span><span> )))
</span><span> 53</span>                 self::<span>$_imports</span> [<span>$alias</span>] = <span>$alias</span><span>;
</span><span> 54</span>             <span>return</span> <span>$alias</span><span>;
</span><span> 55</span> <span>        }
</span><span> 56</span>         
<span> 57</span>         <span>$className</span> = ( <span>string</span> ) <span>substr</span> ( <span>$alias</span>, <span>$pos</span> + 1<span> );
</span><span> 58</span>         <span>$isClass</span> = <span>$className</span> !== '*'<span>;
</span><span> 59</span>         
<span> 60</span>         <span>if</span> (<span>$isClass</span> && (<span>class_exists</span> ( <span>$className</span>, <span>false</span> ) || <span>interface_exists</span> ( <span>$className</span>, <span>false</span><span> )))
</span><span> 61</span>             <span>return</span> self::<span>$_imports</span> [<span>$alias</span>] = <span>$className</span><span>;
</span><span> 62</span>         
<span> 63</span>         <span>if</span> ((<span>$path</span> = self::getPathOfAlias ( <span>$alias</span> )) !== <span>false</span><span>) {
</span><span> 64</span>             <span>if</span> (<span>$isClass</span><span>) {
</span><span> 65</span>                 <span>if</span> (<span>$forceInclude</span><span>) {
</span><span> 66</span>                     <span>if</span> (<span>is_file</span> ( <span>$path</span> . '.php'<span> ))
</span><span> 67</span>                         <span>require</span> (<span>$path</span> . '.php'<span>);
</span><span> 68</span>                     <span>else</span>
<span> 69</span>                         <span>throw</span> <span>new</span> CException ( Yii::t ( 'yii', 'Alias "{alias}" is invalid. Make sure it points to an existing PHP file and the file is readable.', <span>array</span><span> (
</span><span> 70</span>                                 '{alias}' => <span>$alias</span> 
<span> 71</span> <span>                        ) ) );
</span><span> 72</span>                     self::<span>$_imports</span> [<span>$alias</span>] = <span>$className</span><span>;
</span><span> 73</span>                 } <span>else</span>
<span> 74</span>                     self::<span>$classMap</span> [<span>$className</span>] = <span>$path</span> . '.php'<span>;
</span><span> 75</span>                 <span>return</span> <span>$className</span><span>;
</span><span> 76</span>             } <span>else</span>             <span>//</span><span> a directory</span>
<span> 77</span> <span>            {
</span><span> 78</span>                 <span>if</span> (self::<span>$_includePaths</span> === <span>null</span><span>) {
</span><span> 79</span>                     self::<span>$_includePaths</span> = <span>array_unique</span> ( <span>explode</span> ( PATH_SEPARATOR, <span>get_include_path</span><span> () ) );
</span><span> 80</span>                     <span>if</span> ((<span>$pos</span> = <span>array_search</span> ( '.', self::<span>$_includePaths</span>, <span>true</span> )) !== <span>false</span><span>)
</span><span> 81</span>                         <span>unset</span> ( self::<span>$_includePaths</span> [<span>$pos</span><span>] );
</span><span> 82</span> <span>                }
</span><span> 83</span>                 
<span> 84</span>                 <span>array_unshift</span> ( self::<span>$_includePaths</span>, <span>$path</span><span> );
</span><span> 85</span>                 
<span> 86</span>                 <span>if</span> (self::<span>$enableIncludePath</span> && <span>set_include_path</span> ( '.' . PATH_SEPARATOR . <span>implode</span> ( PATH_SEPARATOR, self::<span>$_includePaths</span> ) ) === <span>false</span><span>)
</span><span> 87</span>                     self::<span>$enableIncludePath</span> = <span>false</span><span>;
</span><span> 88</span>                 
<span> 89</span>                 <span>return</span> self::<span>$_imports</span> [<span>$alias</span>] = <span>$path</span><span>;
</span><span> 90</span> <span>            }
</span><span> 91</span> <span>        }
</span><span> 92</span> <span>    }
</span><span> 93</span>     <span>//</span><span>创建组件实例</span>
<span> 94</span>     <span>public</span> <span>static</span> <span>function</span> createComponent(<span>$config</span><span>) {
</span><span> 95</span>         <span>if</span> (<span>is_string</span> ( <span>$config</span><span> )) {
</span><span> 96</span>             <span>$type</span> = <span>$config</span><span>;
</span><span> 97</span>             <span>$config</span> = <span>array</span><span> ();
</span><span> 98</span>         } <span>elseif</span> (<span>isset</span> ( <span>$config</span> ['class'<span>] )) {
</span><span> 99</span>             <span>$type</span> = <span>$config</span> ['class'<span>];
</span><span>100</span>             <span>unset</span> ( <span>$config</span> ['class'<span>] );
</span><span>101</span> <span>        }
</span><span>102</span>         <span>if</span> (! <span>class_exists</span> ( <span>$type</span>, <span>false</span><span> )) {
</span><span>103</span>             <span>$type</span> = Yii::import ( <span>$type</span>, <span>true</span><span> );
</span><span>104</span> <span>        }
</span><span>105</span>         <span>if</span> ((<span>$n</span> = <span>func_num_args</span> ()) > 1<span>) {
</span><span>106</span>             <span>$args</span> = <span>func_get_args</span><span> ();
</span><span>107</span>             <span>if</span> (<span>$n</span> === 2<span>)
</span><span>108</span>                 <span>$object</span> = <span>new</span> <span>$type</span> ( <span>$args</span> [1<span>] );
</span><span>109</span>             <span>elseif</span> (<span>$n</span> === 3<span>)
</span><span>110</span>                 <span>$object</span> = <span>new</span> <span>$type</span> ( <span>$args</span> [1], <span>$args</span> [2<span>] );
</span><span>111</span>             <span>elseif</span> (<span>$n</span> === 4<span>)
</span><span>112</span>                 <span>$object</span> = <span>new</span> <span>$type</span> ( <span>$args</span> [1], <span>$args</span> [2], <span>$args</span> [3<span>] );
</span><span>113</span>             <span>else</span><span> {
</span><span>114</span>                 <span>unset</span> ( <span>$args</span> [0<span>] );
</span><span>115</span>                 <span>$class</span> = <span>new</span> ReflectionClass ( <span>$type</span><span> );
</span><span>116</span>                 <span>//</span><span> Note: ReflectionClass::newInstanceArgs() is available for PHP 5.1.3+
</span><span>117</span> <span>                // $object=$class->newInstanceArgs($args);</span>
<span>118</span>                 <span>$object</span> = <span>call_user_func_array</span> ( <span>array</span><span> (
</span><span>119</span>                         <span>$class</span>,
<span>120</span>                         'newInstance' 
<span>121</span>                 ), <span>$args</span><span> );
</span><span>122</span> <span>            }
</span><span>123</span>         } <span>else</span>
<span>124</span>             <span>$object</span> = <span>new</span> <span>$type</span><span> ();
</span><span>125</span>         <span>foreach</span> ( <span>$config</span> <span>as</span> <span>$key</span> => <span>$value</span><span> )
</span><span>126</span>             <span>$object</span>-><span>$key</span> = <span>$value</span><span>;
</span><span>127</span>         
<span>128</span>         <span>return</span> <span>$object</span><span>;
</span><span>129</span> <span>    }
</span><span>130</span>     <span>//</span><span>按需加载相应的php</span>
<span>131</span>     <span>public</span> <span>static</span> <span>function</span> autoload(<span>$className</span><span>) {
</span><span>132</span>         <span>include</span> self::<span>$_coreClasses</span> [<span>$className</span><span>];
</span><span>133</span> <span>    }
</span><span>134</span>     <span>private</span> <span>static</span> <span>$_coreClasses</span> = <span>array</span><span> (
</span><span>135</span>             'CApplication' => '/base/CApplication.php',
<span>136</span>             'CModule' => '/base/CModule.php',
<span>137</span>             'CWebApplication' => '/base/CWebApplication.php',
<span>138</span>             'CUrlManager' => 'CUrlManager.php',
<span>139</span>             'CComponent' => '/base/CComponent.php'
<span>140</span>         ,    'CUrlRule' => 'CUrlRule.php',
<span>141</span>             'CController' => 'CController.php',
<span>142</span>             'CInlineAction' => '/actions/CInlineAction.php',
<span>143</span>             'CAction' => '/actions/CAction.php',
<span>144</span>             'CFilterChain' => '/filters/CFilterChain.php',
<span>145</span>             'CFilter' => '/filters/CFilter.php',
<span>146</span>             'CList' => '/collections/CList.php',
<span>147</span>             'CHttpRequest' => 'CHttpRequest.php',
<span>148</span>             'CDb' => 'CDb.php',
<span>149</span>             'CInlineFilter' => 'filters/CInlineFilter.php' 
<span>150</span> <span>    );
</span><span>151</span> <span>}
</span><span>152</span> 
<span>153</span> spl_autoload_register ( <span>array</span><span> (
</span><span>154</span>         'YiiBase',
<span>155</span>         'autoload' 
<span>156</span> ) );

ログイン後にコピー

看似很多，其实就三个地方注意下就可以了

1.spl_autoload_register,用这个就可以实现传说中的按需加载相应的php了,坑爹啊。

2.createComponent($config)这个方法是yii组件调用的核心。在配置中注册的所有组件都是通过它获取组件类的实例的。比如配置：

<span> 1</span> <?<span>php
</span><span> 2</span> <span>return</span> <span>array</span><span> (
</span><span> 3</span>         'basePath' => <span>dirname</span> ( <span>__FILE__</span> ) . DIRECTORY_SEPARATOR . '..',
<span> 4</span>         
<span> 5</span>         'import' => <span>array</span><span> (
</span><span> 6</span>                 'application.util.*' 
<span> 7</span>         ),
<span> 8</span>         
<span> 9</span>         'components' => <span>array</span><span> (
</span><span>10</span>                 'db' => <span>array</span><span> (
</span><span>11</span>                         'class' => 'CDb',
<span>12</span>                         'driver' => 'mysql',
<span>13</span>                         'hostname' => 'localhost',
<span>14</span>                         'username' => 'root',
<span>15</span>                         'password' => '',
<span>16</span>                         'database' => 'youtube' 
<span>17</span>                 ),
<span>18</span>                 'urlManager' => <span>array</span><span> (
</span><span>19</span>                         'urlFormat' => 'path',
<span>20</span>                         'rules' => <span>array</span><span> (
</span><span>21</span>                                 'comment_reply/<a:\d+>/<ci:\d+>' => 'reply/load_comment_reply',
<span>22</span>                                 'b/<id:\d+>' => <span>array</span><span> (
</span><span>23</span>                                         'video/broadcast',
<span>24</span>                                         'urlSuffix' => '.html' 
<span>25</span>                                 ),
<span>26</span>                                 'c/<list_start:\d+>' => 'video/list_more_video',
<span>27</span>                                 'u/reg' => 'user/reg',
<span>28</span>                                 'v/upload' => 'video/upload_video',
<span>29</span>                                 'login' => 'user/to_login',
<span>30</span>                                 'show_chanel/<chanel_id:\d+>' => 'show/chanel' ,
<span>31</span>                                 'show/<show_id:\d+>' => 'show/show',
<span>32</span> <span>                        ) 
</span><span>33</span> <span>                ) 
</span><span>34</span> <span>        ) 
</span><span>35</span> <span>);
</span><span>36</span> ?>

ログイン後にコピー

这个文件就返回了个map,里面components中的db,urlManager便是我注册的系统中的组件,里面的array便是组件的参数.

从源码中看到$type = $config ['class'];$object = new $type;就创建了注册的类实例了。

3.import($alias, $forceInclude = false)。作用：导入一个类或一个目录。导入一个类就像包含相应的类文件。主要区别是导入一个类比较轻巧，它仅在类文件首次引用时包含。这个也是yii的一个核心优化点。

这个在上面createComponent($config)中有用到，

if (!class_exists ( $type, false )) {
　　$type = Yii::import ( $type, true );
}

如果$type类没有定义，就去导入。有些组件，核心在yii中多次create调用，这样就保证了仅在类文件首次引用时导入。

下面分析index.php中Yii::createWebApplication ( $config )的调用过程。

这个调用是去了CWebApplication。

<span> 1</span> <?<span>php
</span><span> 2</span> <span>class</span> CWebApplication <span>extends</span><span> CApplication {
</span><span> 3</span>     <span>public</span> <span>$controllerNamespace</span><span>;
</span><span> 4</span>     <span>private</span> <span>$_controllerPath</span><span>;
</span><span> 5</span>     <span>private</span> <span>$_viewPath</span><span>;
</span><span> 6</span>     <span>private</span> <span>$_systemViewPath</span><span>;
</span><span> 7</span>     <span>private</span> <span>$_controller</span><span>;
</span><span> 8</span>     <span>public</span> <span>$controllerMap</span>=<span>array</span><span>();
</span><span> 9</span>     <span>public</span> <span>function</span> processRequest() {<span>//</span><span>开始执行请求
</span><span>10</span> <span>        //获取urlManager组件，解析请求，得到controller/action这种格式的string,
</span><span>11</span> <span>        //并且将隐藏参数与请求的参数一一对应，匹配起来，写入$_REQUEST中</span>
<span>12</span>         <span>$route</span> = <span>$this</span>->getUrlManager ()->parseUrl (<span>$this</span>-><span>getRequest());
</span><span>13</span>         <span>$this</span>->runController ( <span>$route</span><span> );
</span><span>14</span> <span>    }
</span><span>15</span>     <span>public</span> <span>function</span> getRequest() {<span>//</span><span>获取request组件</span>
<span>16</span>         <span>return</span> <span>$this</span>->getComponent ( 'request'<span> );
</span><span>17</span> <span>    }
</span><span>18</span>     <span>protected</span> <span>function</span> registerCoreComponents() {<span>//</span><span>注册核心组件</span>
<span>19</span>         parent::<span>registerCoreComponents ();
</span><span>20</span> <span>    }
</span><span>21</span>     <span>//</span><span>执行contronller</span>
<span>22</span>     <span>public</span> <span>function</span> runController(<span>$route</span><span>) {
</span><span>23</span>         <span>if</span> ((<span>$ca</span> = <span>$this</span>->createController ( <span>$route</span> )) !== <span>null</span><span>) {
</span><span>24</span>             <span>list</span> ( <span>$controller</span>, <span>$actionID</span> ) = <span>$ca</span><span>;
</span><span>25</span>             <span>$oldController</span> = <span>$this</span>-><span>_controller;
</span><span>26</span>             <span>$this</span>->_controller = <span>$controller</span><span>;
</span><span>27</span>             <span>$controller</span>->init ();<span>//</span><span>钩子,在执行action方法前调用，子类去实现</span>
<span>28</span>             <span>$controller</span>->run ( <span>$actionID</span> );<span>//</span><span>开始转入controller类中action方法的执行</span>
<span>29</span>             <span>$this</span>->_controller = <span>$oldController</span><span>;
</span><span>30</span> <span>        }
</span><span>31</span> <span>    }
</span><span>32</span>     <span>//</span><span>创建controller类实例,从controller/action这种格式的string中解析出$controller, $actionID </span>
<span>33</span>     <span>public</span> <span>function</span> createController(<span>$route</span>, <span>$owner</span> = <span>null</span><span>) {
</span><span>34</span>         <span>if</span> (<span>$owner</span> === <span>null</span><span>)
</span><span>35</span>             <span>$owner</span> = <span>$this</span><span>;
</span><span>36</span>         <span>if</span> ((<span>$route</span> = <span>trim</span> ( <span>$route</span>, '/' )) === ''<span>)
</span><span>37</span>             <span>$route</span> = <span>$owner</span>-><span>defaultController;
</span><span>38</span> 
<span>39</span>         <span>$route</span> .= '/'<span>;
</span><span>40</span>         <span>while</span> ( (<span>$pos</span> = <span>strpos</span> ( <span>$route</span>, '/' )) !== <span>false</span><span> ) {
</span><span>41</span>             <span>$id</span> = <span>substr</span> ( <span>$route</span>, 0, <span>$pos</span><span> );
</span><span>42</span>             <span>if</span> (! <span>preg_match</span> ( '/^\w+$/', <span>$id</span><span> ))
</span><span>43</span>                 <span>return</span> <span>null</span><span>;
</span><span>44</span>             <span>$id</span> = <span>strtolower</span> ( <span>$id</span><span> );
</span><span>45</span>             <span>$route</span> = ( <span>string</span> ) <span>substr</span> ( <span>$route</span>, <span>$pos</span> + 1<span> );
</span><span>46</span>             <span>if</span> (! <span>isset</span> ( <span>$basePath</span> ))             <span>//</span><span> first segment</span>
<span>47</span> <span>            {
</span><span>48</span>                 <span>$basePath</span> = <span>$owner</span>-><span>getControllerPath ();
</span><span>49</span>                 <span>$controllerID</span> = ''<span>;
</span><span>50</span>             } <span>else</span><span> {
</span><span>51</span>                 <span>$controllerID</span> .= '/'<span>;
</span><span>52</span> <span>            }
</span><span>53</span>             <span>$className</span> = <span>ucfirst</span> ( <span>$id</span> ) . 'Controller'<span>;
</span><span>54</span>             <span>$classFile</span> = <span>$basePath</span> . DIRECTORY_SEPARATOR . <span>$className</span> . '.php'<span>;
</span><span>55</span> 
<span>56</span>             <span>if</span> (<span>is_file</span> ( <span>$classFile</span><span> )) {
</span><span>57</span>                 <span>if</span> (! <span>class_exists</span> ( <span>$className</span>, <span>false</span><span> ))
</span><span>58</span>                     <span>require</span> (<span>$classFile</span><span>);
</span><span>59</span>                 <span>if</span> (<span>class_exists</span> ( <span>$className</span>, <span>false</span> ) && <span>is_subclass_of</span> ( <span>$className</span>, 'CController'<span> )) {
</span><span>60</span>                     <span>$id</span> [0] = <span>strtolower</span> ( <span>$id</span> [0<span>] );
</span><span>61</span>                     <span>return</span> <span>array</span><span> (
</span><span>62</span>                             <span>new</span> <span>$className</span> ( <span>$controllerID</span> . <span>$id</span>, <span>$owner</span> === <span>$this</span> ? <span>null</span> : <span>$owner</span> ),
<span>63</span>                             <span>$this</span>->parseActionParams ( <span>$route</span><span> )
</span><span>64</span> <span>                    );
</span><span>65</span> <span>                }
</span><span>66</span>                 <span>return</span> <span>null</span><span>;
</span><span>67</span> <span>            }
</span><span>68</span>             <span>$controllerID</span> .= <span>$id</span><span>;
</span><span>69</span>             <span>$basePath</span> .= DIRECTORY_SEPARATOR . <span>$id</span><span>;
</span><span>70</span> <span>        }
</span><span>71</span> <span>    }
</span><span>72</span>     <span>protected</span> <span>function</span> parseActionParams(<span>$pathInfo</span><span>) {
</span><span>73</span>         <span>if</span> ((<span>$pos</span> = <span>strpos</span> ( <span>$pathInfo</span>, '/' )) !== <span>false</span><span>) {
</span><span>74</span>             <span>$manager</span> = <span>$this</span>->getUrlManager ();<span>//</span><span>再次获取urlManager,在上面第一次调用中已经导入。</span>
<span>75</span>             <span>$manager</span>->parsePathInfo ( ( <span>string</span> ) <span>substr</span> ( <span>$pathInfo</span>, <span>$pos</span> + 1<span> ) );
</span><span>76</span>             <span>$actionID</span> = <span>substr</span> ( <span>$pathInfo</span>, 0, <span>$pos</span><span> );
</span><span>77</span>             <span>return</span> <span>$manager</span>->caseSensitive ? <span>$actionID</span> : <span>strtolower</span> ( <span>$actionID</span><span> );
</span><span>78</span>         } <span>else</span>
<span>79</span>             <span>return</span> <span>$pathInfo</span><span>;
</span><span>80</span> <span>    }
</span><span>81</span>     <span>public</span> <span>function</span><span> getControllerPath() {
</span><span>82</span>         <span>if</span> (<span>$this</span>->_controllerPath !== <span>null</span><span>)
</span><span>83</span>             <span>return</span> <span>$this</span>-><span>_controllerPath;
</span><span>84</span>         <span>else</span>
<span>85</span>             <span>return</span> <span>$this</span>->_controllerPath = <span>$this</span>->getBasePath () . DIRECTORY_SEPARATOR . 'controllers'<span>;
</span><span>86</span> <span>    }
</span><span>87</span>     <span>//</span><span>两个钩子,子类去实现</span>
<span>88</span>     <span>public</span> <span>function</span> beforeControllerAction(<span>$controller</span>, <span>$action</span><span>) {
</span><span>89</span>         <span>return</span> <span>true</span><span>;
</span><span>90</span> <span>    }
</span><span>91</span>     <span>public</span> <span>function</span> afterControllerAction(<span>$controller</span>, <span>$action</span><span>) {
</span><span>92</span> <span>    }
</span><span>93</span>     <span>protected</span> <span>function</span><span> init() {
</span><span>94</span>         parent::<span>init ();
</span><span>95</span> <span>    }
</span><span>96</span> }

ログイン後にコピー

没有构造方法，构造方法在父类CApplication里面。

<span> 1</span> <?<span>php
</span><span> 2</span> <span>abstract</span> <span>class</span> CApplication <span>extends</span><span> CModule {
</span><span> 3</span>     <span>private</span> <span>$_id</span><span>;
</span><span> 4</span>     <span>private</span> <span>$_basePath</span><span>;
</span><span> 5</span>     <span>abstract</span> <span>public</span> <span>function</span><span> processRequest();
</span><span> 6</span>     <span>public</span> <span>function</span> __construct(<span>$config</span> = <span>null</span><span>) {
</span><span> 7</span>         <span>if</span> (<span>is_string</span> ( <span>$config</span><span> ))
</span><span> 8</span>             <span>$config</span> = <span>require</span> (<span>$config</span><span>);
</span><span> 9</span>         Yii::setApplication ( <span>$this</span> );<span>//</span><span>保存整个app实例</span>
<span>10</span>         <span>if</span> (<span>isset</span> ( <span>$config</span> ['basePath'<span>] )) {
</span><span>11</span>             <span>$this</span>->setBasePath ( <span>$config</span> ['basePath'<span>] );
</span><span>12</span>             <span>unset</span> ( <span>$config</span> ['basePath'<span>] );
</span><span>13</span>         } <span>else</span>
<span>14</span>             <span>$this</span>->setBasePath ( 'protected'<span> );
</span><span>15</span>         <span>//</span><span>设置别名,后面就可以用application表示basePath了</span>
<span>16</span>         Yii::setPathOfAlias ( 'application', <span>$this</span>-><span>getBasePath () );
</span><span>17</span>         <span>//</span><span>钩子，模块 预 初始化时执行，子类实现。不过这时，配置还没有写入框架</span>
<span>18</span>         <span>$this</span>-><span>preinit ();
</span><span>19</span>         <span>$this</span>-><span>registerCoreComponents ();
</span><span>20</span>         <span>//</span><span>父类实现</span>
<span>21</span>         <span>$this</span>->configure ( <span>$config</span><span> );
</span><span>22</span>         <span>//</span><span>加载静态应用组件</span>
<span>23</span>         <span>$this</span>-><span>preloadComponents ();
</span><span>24</span>         <span>//</span><span>这才开始初始化模块</span>
<span>25</span>         <span>$this</span>-><span>init ();
</span><span>26</span> <span>    }
</span><span>27</span>     <span>protected</span> <span>function</span><span> registerCoreComponents() {
</span><span>28</span>         <span>$components</span> = <span>array</span><span> (
</span><span>29</span>                 'request' => <span>array</span><span> (
</span><span>30</span>                         'class' => 'CHttpRequest'
<span>31</span>                 ),
<span>32</span>                 'urlManager' => <span>array</span><span> (
</span><span>33</span>                         'class' => 'CUrlManager'
<span>34</span> <span>                )
</span><span>35</span> <span>        );
</span><span>36</span> 
<span>37</span>         <span>$this</span>->setComponents ( <span>$components</span> );<span>//</span><span>父类实现</span>
<span>38</span> <span>    }
</span><span>39</span>     <span>public</span> <span>function</span><span> run() {
</span><span>40</span>         <span>$this</span>-><span>processRequest ();
</span><span>41</span> <span>    }
</span><span>42</span>     <span>public</span> <span>function</span><span> getId() {
</span><span>43</span>         <span>if</span> (<span>$this</span>->_id !== <span>null</span><span>)
</span><span>44</span>             <span>return</span> <span>$this</span>-><span>_id;
</span><span>45</span>         <span>else</span>
<span>46</span>             <span>return</span> <span>$this</span>->_id = <span>sprintf</span> ( '%x', <span>crc32</span> ( <span>$this</span>->getBasePath () . <span>$this</span>-><span>name ) );
</span><span>47</span> <span>    }
</span><span>48</span>     <span>public</span> <span>function</span> setId(<span>$id</span><span>) {
</span><span>49</span>         <span>$this</span>->_id = <span>$id</span><span>;
</span><span>50</span> <span>    }
</span><span>51</span>     <span>public</span> <span>function</span><span> getBasePath() {
</span><span>52</span>         <span>return</span> <span>$this</span>-><span>_basePath;
</span><span>53</span> <span>    }
</span><span>54</span>     <span>public</span> <span>function</span> setBasePath(<span>$path</span><span>) {
</span><span>55</span>         <span>if</span> ((<span>$this</span>->_basePath = <span>realpath</span> ( <span>$path</span> )) === <span>false</span> || ! <span>is_dir</span> ( <span>$this</span>-><span>_basePath ))
</span><span>56</span>             <span>return</span><span>;
</span><span>57</span> <span>    }
</span><span>58</span>     <span>public</span> <span>function</span><span> getDb() {
</span><span>59</span>         <span>return</span> <span>$this</span>->getComponent ( 'db' );<span>//</span><span>父类实现</span>
<span>60</span> <span>    }
</span><span>61</span>     <span>public</span> <span>function</span><span> getUrlManager() {
</span><span>62</span>         <span>return</span> <span>$this</span>->getComponent ( 'urlManager'<span> );
</span><span>63</span> <span>    }
</span><span>64</span>     <span>public</span> <span>function</span><span> getController() {
</span><span>65</span>         <span>return</span> <span>null</span><span>;
</span><span>66</span> <span>    }
</span><span>67</span>     <span>public</span> <span>function</span> getBaseUrl(<span>$absolute</span> = <span>false</span><span>) {
</span><span>68</span>         <span>return</span> <span>$this</span>->getRequest ()->getBaseUrl ( <span>$absolute</span><span> );
</span><span>69</span> <span>    }
</span><span>70</span> }

ログイン後にコピー

__construct里面注释写的很详细了，值得注意的是registerCoreComponents ()。前面说了那么多，那么Yii::createWebApplication ( $config )到底是做什么的。

其实最终目的对这个裁剪过的yii而言就是注册核心组件。就这么简单.

setComponents ( $components )在父类CModule里面.

<span> 1</span> <?<span>php
</span><span> 2</span> <span>abstract</span> <span>class</span> CModule <span>extends</span><span> CComponent {
</span><span> 3</span>     <span>public</span> <span>$preload</span> = <span>array</span><span> ();
</span><span> 4</span>     <span>public</span> <span>$behaviors</span> = <span>array</span><span> ();
</span><span> 5</span>     <span>private</span> <span>$_id</span><span>;
</span><span> 6</span>     <span>private</span> <span>$_parentModule</span><span>;
</span><span> 7</span>     <span>private</span> <span>$_basePath</span><span>;
</span><span> 8</span>     <span>private</span> <span>$_modulePath</span><span>;
</span><span> 9</span>     <span>private</span> <span>$_params</span><span>;
</span><span>10</span>     <span>private</span> <span>$_modules</span> = <span>array</span><span> ();
</span><span>11</span>     <span>private</span> <span>$_moduleConfig</span> = <span>array</span><span> ();
</span><span>12</span>     <span>private</span> <span>$_components</span> = <span>array</span><span> ();
</span><span>13</span>     <span>private</span> <span>$_componentConfig</span> = <span>array</span><span> ();
</span><span>14</span>     <span>//</span><span>重写是为了方便直接用 application.组件 这种方式直接获取组件</span>
<span>15</span>     <span>public</span> <span>function</span> __get(<span>$name</span><span>) {
</span><span>16</span>         <span>if</span> (<span>$this</span>->hasComponent ( <span>$name</span><span> ))
</span><span>17</span>             <span>return</span> <span>$this</span>->getComponent ( <span>$name</span><span> );
</span><span>18</span>         <span>else</span>
<span>19</span>             <span>return</span> parent::__get ( <span>$name</span><span> );
</span><span>20</span> <span>    }
</span><span>21</span>     <span>public</span> <span>function</span> __isset(<span>$name</span><span>) {
</span><span>22</span>         <span>if</span> (<span>$this</span>->hasComponent ( <span>$name</span><span> ))
</span><span>23</span>             <span>return</span> <span>$this</span>->getComponent ( <span>$name</span> ) !== <span>null</span><span>;
</span><span>24</span>         <span>else</span>
<span>25</span>             <span>return</span> parent::__isset ( <span>$name</span><span> );
</span><span>26</span> <span>    }
</span><span>27</span>     <span>public</span> <span>function</span> hasComponent(<span>$id</span><span>) {
</span><span>28</span>         <span>return</span> <span>isset</span> ( <span>$this</span>->_components [<span>$id</span>] ) || <span>isset</span> ( <span>$this</span>->_componentConfig [<span>$id</span><span>] );
</span><span>29</span> <span>    }
</span><span>30</span>     <span>//
</span><span>31</span>     <span>public</span> <span>function</span> getComponent(<span>$id</span>, <span>$createIfNull</span> = <span>true</span><span>) {
</span><span>32</span>         <span>if</span> (<span>isset</span> ( <span>$this</span>->_components [<span>$id</span><span>] ))
</span><span>33</span>             <span>return</span> <span>$this</span>->_components [<span>$id</span><span>];
</span><span>34</span>         <span>else</span> <span>if</span> (<span>isset</span> ( <span>$this</span>->_componentConfig [<span>$id</span>] ) && <span>$createIfNull</span><span>) {
</span><span>35</span>             <span>$config</span> = <span>$this</span>->_componentConfig [<span>$id</span><span>];
</span><span>36</span>             <span>$component</span> = Yii::createComponent ( <span>$config</span> );<span>//</span><span>YiiBase,返回组件实例</span>
<span>37</span>             <span>$component</span>->init ();<span>//</span><span>钩子，调用子类重写的init方法
</span><span>38</span> <span>            //将组件写入数组保存，并返回</span>
<span>39</span>             <span>return</span> <span>$this</span>->_components [<span>$id</span>] = <span>$component</span><span>;
</span><span>40</span> <span>        }
</span><span>41</span> <span>    }
</span><span>42</span>     <span>public</span> <span>function</span> setComponent(<span>$id</span>, <span>$component</span>, <span>$merge</span> = <span>true</span><span>) {
</span><span>43</span>         <span>//</span><span>组件写入数组保存</span>
<span>44</span>         <span>if</span> (<span>isset</span> ( <span>$this</span>->_componentConfig [<span>$id</span>] ) && <span>$merge</span><span>) {
</span><span>45</span>             
<span>46</span>             <span>$this</span>->_componentConfig [<span>$id</span>] = self::mergeArray ( <span>$this</span>->_componentConfig [<span>$id</span>], <span>$component</span><span> );
</span><span>47</span>         } <span>else</span><span> {
</span><span>48</span>             
<span>49</span>             <span>$this</span>->_componentConfig [<span>$id</span>] = <span>$component</span><span>;
</span><span>50</span> <span>        }
</span><span>51</span> <span>    }
</span><span>52</span>     <span>public</span> <span>static</span> <span>function</span> mergeArray(<span>$a</span>, <span>$b</span><span>) {
</span><span>53</span>         <span>$args</span> = <span>func_get_args</span><span> ();
</span><span>54</span>         <span>$res</span> = <span>array_shift</span> ( <span>$args</span><span> );
</span><span>55</span>         <span>while</span> ( ! <span>empty</span> ( <span>$args</span><span> ) ) {
</span><span>56</span>             <span>$next</span> = <span>array_shift</span> ( <span>$args</span><span> );
</span><span>57</span>             <span>foreach</span> ( <span>$next</span> <span>as</span> <span>$k</span> => <span>$v</span><span> ) {
</span><span>58</span>                 <span>if</span> (<span>is_integer</span> ( <span>$k</span><span> ))
</span><span>59</span>                     <span>isset</span> ( <span>$res</span> [<span>$k</span>] ) ? <span>$res</span> [] = <span>$v</span> : <span>$res</span> [<span>$k</span>] = <span>$v</span><span>;
</span><span>60</span>                 <span>elseif</span> (<span>is_array</span> ( <span>$v</span> ) && <span>isset</span> ( <span>$res</span> [<span>$k</span>] ) && <span>is_array</span> ( <span>$res</span> [<span>$k</span><span>] ))
</span><span>61</span>                     <span>$res</span> [<span>$k</span>] = self::mergeArray ( <span>$res</span> [<span>$k</span>], <span>$v</span><span> );
</span><span>62</span>                 <span>else</span>
<span>63</span>                     <span>$res</span> [<span>$k</span>] = <span>$v</span><span>;
</span><span>64</span> <span>            }
</span><span>65</span> <span>        }
</span><span>66</span>         <span>return</span> <span>$res</span><span>;
</span><span>67</span> <span>    }
</span><span>68</span>     <span>public</span> <span>function</span> setComponents(<span>$components</span>, <span>$merge</span> = <span>true</span><span>) {
</span><span>69</span>         <span>foreach</span> ( <span>$components</span> <span>as</span> <span>$id</span> => <span>$component</span><span> )
</span><span>70</span>             <span>$this</span>->setComponent ( <span>$id</span>, <span>$component</span>, <span>$merge</span><span> );
</span><span>71</span> <span>    }
</span><span>72</span>     <span>//</span><span>子类CApplication调用，用来为模块指定配置</span>
<span>73</span>     <span>public</span> <span>function</span> configure(<span>$config</span><span>) {
</span><span>74</span>         <span>if</span> (<span>is_array</span> ( <span>$config</span><span> )) {
</span><span>75</span>             <span>foreach</span> ( <span>$config</span> <span>as</span> <span>$key</span> => <span>$value</span><span> )
</span><span>76</span>                 <span>$this</span>-><span>$key</span> = <span>$value</span><span>;
</span><span>77</span> <span>        }
</span><span>78</span> <span>    }
</span><span>79</span>     <span>protected</span> <span>function</span><span> preloadComponents() {
</span><span>80</span>         <span>foreach</span> ( <span>$this</span>->preload <span>as</span> <span>$id</span><span> )
</span><span>81</span>             <span>$this</span>->getComponent ( <span>$id</span><span> );
</span><span>82</span> <span>    }
</span><span>83</span>     <span>//</span><span>又是两个钩子</span>
<span>84</span>     <span>protected</span> <span>function</span><span> preinit() {
</span><span>85</span> <span>    }
</span><span>86</span>     <span>protected</span> <span>function</span><span> init() {
</span><span>87</span> <span>    }
</span><span>88</span> }

ログイン後にコピー

看到所谓的注册组件就是写入数组保存，getComponent()的时候就是用前面讲到的YiiBase里面的createComponent($config)返回组件实例。就这么简单。

而CApplication里面的什么getDb()，getUrlManager()也是在调用getComponent()。

このウェブサイトの声明

この記事の内容はネチズンが自主的に寄稿したものであり、著作権は原著者に帰属します。このサイトは、それに相当する法的責任を負いません。盗作または侵害の疑いのあるコンテンツを見つけた場合は、admin@php.cn までご連絡ください。

ホットAIツール

ホットツール

ホットトピック

Gmailメールのログイン入り口はどこですか？

7529

CakePHP チュートリアル

1378

Steamのアカウント名の形式は何ですか

Win11 Activation Key Permanent

NYTの接続はヒントと回答です

Related knowledge

PHP フレームワーク Yii を使用して可用性の高いクラウドバックアップシステムを開発する方法 Jun 27, 2023 am 09:04 AM

クラウドコンピューティングテクノロジの継続的な発展により、データのバックアップはすべての企業が行う必要のあるものになりました。この文脈では、可用性の高いクラウドバックアップシステムを開発することが特に重要です。 PHP フレームワーク Yii は、開発者が高性能の Web アプリケーションを迅速に構築できる強力なフレームワークです。ここでは、Yii フレームワークを使用して可用性の高いクラウドバックアップシステムを開発する方法を紹介します。データベースモデルの設計 Yii フレームワークでは、データベースモデルは非常に重要な部分です。データバックアップシステムには多くのテーブルとリレーションシップが必要なため、

Symfony と Yii2: 大規模な Web アプリケーションの開発にはどちらのフレームワークが適していますか? Jun 19, 2023 am 10:57 AM

Web アプリケーションの需要が高まるにつれ、開発者が開発フレームワークを選択する選択肢はますます増えています。 PHP フレームワークとして人気のある Symfony と Yii2 は、どちらも強力な機能とパフォーマンスを備えていますが、大規模な Web アプリケーションを開発する必要がある場合、どちらのフレームワークがより適しているのでしょうか。次に、より良い選択を行うために、Symphony と Yii2 の比較分析を行います。基本概要 Symphony は、PHP で書かれたオープンソースの Web アプリケーションフレームワークであり、上に構築されています。

Yii フレームワークでのデータクエリ: データに効率的にアクセスする Jun 21, 2023 am 11:22 AM

Yii フレームワークは、Web アプリケーション開発のプロセスを簡素化するための多数のツールとコンポーネントを提供するオープンソースの PHP Web アプリケーションフレームワークであり、その重要なコンポーネントの 1 つがデータクエリです。 Yii フレームワークでは、SQL に似た構文を使用してデータベースにアクセスし、データを効率的にクエリおよび操作できます。 Yii フレームワークのクエリビルダーには主に次の種類があります: ActiveRecord クエリ、QueryBuilder クエリ、コマンドクエリ、独自の SQL クエリ

PHPでYii3フレームワークを使用するにはどうすればよいですか? May 31, 2023 pm 10:42 PM

インターネットの発展に伴い、Web アプリケーション開発の需要もますます高まっています。開発者にとって、アプリケーションの開発には、開発効率を向上させる、安定性、効率性、強力なフレームワークが必要です。 Yii は、豊富な機能と優れたパフォーマンスを提供する、優れた高性能 PHP フレームワークです。 Yii3 は Yii フレームワークの次世代バージョンであり、Yii2 に基づいてパフォーマンスとコード品質をさらに最適化します。この記事では、Yii3 フレームワークを使用して PHP アプリケーションを開発する方法を紹介します。

Yii2 と Phalcon: グラフィックレンダリングアプリケーションの開発にはどちらのフレームワークが適していますか? Jun 19, 2023 am 08:09 AM

現在の情報化時代では、ビッグデータ、人工知能、クラウドコンピューティング、その他のテクノロジーが大手企業の焦点となっています。その中でも、高性能なグラフィックス処理技術として、グラフィックスカードレンダリング技術がますます注目を集めています。グラフィックスカードレンダリングテクノロジは、ゲーム開発、映画やテレビの特殊効果、エンジニアリングモデリングなどの分野で広く使用されています。開発者にとって、自分のプロジェクトに合ったフレームワークを選択することは非常に重要な決定です。現在の言語の中でも PHP は非常に動的な言語であり、Yii2、Ph などの優れた PHP フレームワークもいくつかあります。

Yii2 プログラミングガイド: Cron サービスの実行方法 Sep 01, 2023 pm 11:21 PM

「Yii とは何ですか?」という質問がある場合は、私の以前のチュートリアル「Yii フレームワークの紹介」を参照してください。このチュートリアルでは、Yii の利点をレビューし、2014 年 10 月にリリースされた Yii 2.0 の新機能の概要を説明しています。うーん> この Yii2 によるプログラミングシリーズでは、読者に Yii2PHP フレームワークの使い方をガイドします。今日のチュートリアルでは、Yii のコンソール機能を活用して cron ジョブを実行する方法を共有します。以前、私はバックグラウンドタスクを実行するために cron ジョブで wget (Web アクセス可能な URL) を使用しました。これにより、セキュリティ上の懸念が生じ、パフォーマンス上の問題も発生します。 Security for Startup シリーズでリスクを軽減するいくつかの方法について説明しましたが、コンソール駆動のコマンドに移行したいと考えていました。

PHP 開発: Yii2 と GrapeJS を使用してバックエンド CMS とフロントエンドのビジュアル編集を実装する Jun 15, 2023 pm 11:48 PM

現代のソフトウェア開発において、強力なコンテンツ管理システム (CMS) を構築することは簡単な作業ではありません。開発者は広範なスキルと経験を持っている必要があるだけでなく、機能とパフォーマンスを最適化するために最先端のテクノロジーとツールを使用する必要もあります。この記事では、2 つの人気のあるオープンソースソフトウェアである Yii2 と GrapeJS を使用して、バックエンド CMS とフロントエンドのビジュアル編集を実装する方法を紹介します。 Yii2 は、迅速に構築するための豊富なツールとコンポーネントを提供する人気のある PHPWeb フレームワークです。