搜索
首页后端开发php教程yii2源码学习笔记(二十），yii2源码学习笔记_PHP教程
yii2源码学习笔记(二十），yii2源码学习笔记_PHP教程
WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Jul 12, 2016 am 08:49 AM
yii2。学习是源码的笔记类部件

yii2源码学习笔记(二十），yii2源码学习笔记

Widget类是所有部件的基类。yii2\base\Widget.php

<span>  1</span> <?<span>php
</span><span>  2</span> <span>/*</span><span>*
</span><span>  3</span> <span> * @link </span><span>http://www.yiiframework.com/</span>
<span>  4</span> <span> * @copyright Copyright (c) 2008 Yii Software LLC
</span><span>  5</span> <span> * @license </span><span>http://www.yiiframework.com/license/</span>
<span>  6</span>  <span>*/</span>
<span>  7</span> 
<span>  8</span> <span>namespace</span> yii\<span>base</span><span>;
</span><span>  9</span> 
<span> 10</span> <span>use Yii;
</span><span> 11</span> <span>use ReflectionClass;
</span><span> 12</span> 
<span> 13</span> <span>/*</span><span>*
</span><span> 14</span> <span> * Widget is the base class for widgets.
</span><span> 15</span> <span> * Widget是所有小部件的基类
</span><span> 16</span> <span> * @property string $id ID of the widget. 小部件标识
</span><span> 17</span> <span> * @property \yii\web\View $view The view object that can be used to render views or view files. Note that the
</span><span> 18</span> <span> * type of this property differs in getter and setter. See [[getView()]] and [[setView()]] for details.
</span><span> 19</span> <span> * 用于渲染视图或视图文件的视图对象 在getter 和 setter中是不同的
</span><span> 20</span> <span> * @property string $viewPath The directory containing the view files for this widget. This property is
</span><span> 21</span> <span> * read-only. 包含此控件的视图文件目录
</span><span> 22</span> <span> *
</span><span> 23</span> <span> * @author Qiang Xue <qiang.xue@gmail.com>
</span><span> 24</span> <span> * @since 2.0
</span><span> 25</span>  <span>*/</span>
<span> 26</span> <span>class</span><span> Widget extends Component implements ViewContextInterface
</span><span> 27</span> <span>{
</span><span> 28</span>     <span>/*</span><span>*
</span><span> 29</span> <span>     * @var integer a counter used to generate [[id]] for widgets.
</span><span> 30</span> <span>     * @internal 用于生成widget ID的计数器
</span><span> 31</span>      <span>*/</span>
<span> 32</span>     <span>public</span> <span>static</span> $counter = <span>0</span><span>;
</span><span> 33</span>     <span>/*</span><span>*
</span><span> 34</span> <span>     * @var string the prefix to the automatically generated widget IDs.
</span><span> 35</span> <span>     * @see getId() 自动生成的前缀
</span><span> 36</span>      <span>*/</span>
<span> 37</span>     <span>public</span> <span>static</span> $autoIdPrefix = <span>'</span><span>w</span><span>'</span><span>;
</span><span> 38</span>     <span>/*</span><span>*
</span><span> 39</span> <span>     * @var Widget[] the widgets that are currently being rendered (not ended). This property
</span><span> 40</span> <span>     * is maintained by [[begin()]] and [[end()]] methods. 目前正在渲染的小部件
</span><span> 41</span> <span>     * @internal
</span><span> 42</span>      <span>*/</span>
<span> 43</span>     <span>public</span> <span>static</span> $stack =<span> [];
</span><span> 44</span> 
<span> 45</span> 
<span> 46</span>     <span>/*</span><span>*
</span><span> 47</span> <span>     * Begins a widget.  开始一个部件
</span><span> 48</span> <span>     * This method creates an instance of the calling class. It will apply the configuration
</span><span> 49</span> <span>     * to the created instance. A matching [[end()]] call should be called later.
</span><span> 50</span> <span>     * 将应用配置文件创建调用类的实例，与[end()]方法相对应
</span><span> 51</span> <span>     * @param array $config name-value pairs that will be used to initialize the object properties
</span><span> 52</span> <span>     * 用于初始化属性的参数
</span><span> 53</span> <span>     * @return static the newly created widget instance 静态新创建的部件实例
</span><span> 54</span>      <span>*/</span>
<span> 55</span>     <span>public</span> <span>static</span> function begin($config =<span> [])
</span><span> 56</span> <span>    {
</span><span> 57</span>         $config[<span>'</span><span>class</span><span>'</span>] = get_called_class();<span>//</span><span>后期静态绑定类的名称</span>
<span> 58</span>         <span>/*</span><span> @var $widget Widget </span><span>*/</span>
<span> 59</span>         $widget = Yii::createObject($config);<span>//</span><span>通过类名和传入的配置，实例化调用类</span>
<span> 60</span>         <span>static</span>::$stack[] = $widget;<span>//</span><span>将对象放入正在渲染的部件堆栈中</span>
<span> 61</span> 
<span> 62</span>         <span>return</span><span> $widget;
</span><span> 63</span> <span>    }
</span><span> 64</span> 
<span> 65</span>     <span>/*</span><span>*
</span><span> 66</span> <span>     * Ends a widget.   结束小部件
</span><span> 67</span> <span>     * Note that the rendering result of the widget is directly echoed out.渲染结果是直接呼应的
</span><span> 68</span> <span>     * @return static the widget instance that is ended. 静态结束的部件实例。
</span><span> 69</span> <span>     * @throws InvalidCallException if [[begin()]] and [[end()]] calls are not properly nested
</span><span> 70</span>      <span>*/</span>
<span> 71</span>     <span>public</span> <span>static</span><span> function end()
</span><span> 72</span> <span>    {
</span><span> 73</span>         <span>if</span> (!empty(<span>static</span>::$stack)) {<span>//</span><span>正在呈现的小部件堆栈中存在调用类实例</span>
<span> 74</span>             $widget = array_pop(<span>static</span>::$stack);<span>//</span><span>从堆栈中删除最后一个实例</span>
<span> 75</span>             <span>if</span> (get_class($widget) ===<span> get_called_class()) {
</span><span> 76</span>                 echo $widget->run(); <span>//</span><span>如果删除的实例类名和当前调用类名相同，输出小部件的内容</span>
<span> 77</span>                 <span>return</span><span> $widget;
</span><span> 78</span>             } <span>else</span><span> {
</span><span> 79</span>                 <span>throw</span> <span>new</span> InvalidCallException(<span>"</span><span>Expecting end() of </span><span>"</span> . get_class($widget) . <span>"</span><span>, found </span><span>"</span><span> . get_called_class());
</span><span> 80</span> <span>            }
</span><span> 81</span>         } <span>else</span><span> {
</span><span> 82</span>             <span>throw</span> <span>new</span> InvalidCallException(<span>"</span><span>Unexpected </span><span>"</span> . get_called_class() . <span>'</span><span>::end() call. A matching begin() is not found.</span><span>'</span><span>);
</span><span> 83</span> <span>        }
</span><span> 84</span> <span>    }
</span><span> 85</span> 
<span> 86</span>     <span>/*</span><span>*
</span><span> 87</span> <span>     * Creates a widget instance and runs it.   创建一个部件实例，并运行
</span><span> 88</span> <span>     * The widget rendering result is returned by this method. 返回部件渲染的结果。
</span><span> 89</span> <span>     * @param array $config name-value pairs that will be used to initialize the object properties
</span><span> 90</span> <span>     * 用于初始化对象属性的参数
</span><span> 91</span> <span>     * @return string the rendering result of the widget. 控件的渲染结果。
</span><span> 92</span>      <span>*/</span>
<span> 93</span>     <span>public</span> <span>static</span> function widget($config =<span> [])
</span><span> 94</span> <span>    {
</span><span> 95</span>         ob_start(); <span>//</span><span>打开输出缓冲区</span>
<span> 96</span>         ob_implicit_flush(<span>false</span>);<span>//</span><span>关闭绝对刷新</span>
<span> 97</span>         <span>/*</span><span> @var $widget Widget </span><span>*/</span>
<span> 98</span>         $config[<span>'</span><span>class</span><span>'</span>] = get_called_class(); <span>//</span><span>获取调用类的类名</span>
<span> 99</span>         $widget = Yii::createObject($config);   <span>//</span><span>实例化类</span>
<span>100</span>         $<span>out</span> = $widget->run();<span>//</span><span>运行部件</span>
<span>101</span> 
<span>102</span>         <span>return</span> ob_get_clean() . $<span>out</span>; <span>//</span><span>返回内部缓冲区的内容，关闭缓冲区</span>
<span>103</span> <span>    }
</span><span>104</span> 
<span>105</span>     <span>private</span><span> $_id;
</span><span>106</span> 
<span>107</span>     <span>/*</span><span>*
</span><span>108</span> <span>     * Returns the ID of the widget. 返回插件的标识
</span><span>109</span> <span>     * @param boolean $autoGenerate whether to generate an ID if it is not set previously
</span><span>110</span> <span>     * 是否生成一个唯一标识，如果没有设置
</span><span>111</span> <span>     * @return string ID of the widget. 部件唯一标识
</span><span>112</span>      <span>*/</span>
<span>113</span>     <span>public</span> function getId($autoGenerate = <span>true</span><span>)
</span><span>114</span> <span>    {
</span><span>115</span>         <span>if</span> ($autoGenerate && $<span>this</span>->_id === <span>null</span><span>) {
</span><span>116</span>             <span>//</span><span>如果标识为空，并且设置为允许自动生成标识，自动生成</span>
<span>117</span>             $<span>this</span>->_id = <span>static</span>::$autoIdPrefix . <span>static</span>::$counter++<span>;
</span><span>118</span> <span>        }
</span><span>119</span> 
<span>120</span>         <span>return</span> $<span>this</span>-><span>_id;
</span><span>121</span> <span>    }
</span><span>122</span> 
<span>123</span>     <span>/*</span><span>*
</span><span>124</span> <span>     * Sets the ID of the widget. 设置小部件标识
</span><span>125</span> <span>     * @param string $value id of the widget. 部件的标识。
</span><span>126</span>      <span>*/</span>
<span>127</span>     <span>public</span><span> function setId($value)
</span><span>128</span> <span>    {
</span><span>129</span>         $<span>this</span>->_id =<span> $value;
</span><span>130</span> <span>    }
</span><span>131</span> 
<span>132</span>     <span>private</span><span> $_view;
</span><span>133</span> 
<span>134</span>     <span>/*</span><span>*
</span><span>135</span> <span>     * Returns the view object that can be used to render views or view files.返回视图对象
</span><span>136</span> <span>     * The [[render()]] and [[renderFile()]] methods will use
</span><span>137</span> <span>     * this view object to implement the actual view rendering.
</span><span>138</span> <span>     * [render()]和[renderFile()]方法用视图对象实现实际的视图显示。
</span><span>139</span> <span>     * If not set, it will default to the "view" application component.
</span><span>140</span> <span>     * @return \yii\web\View the view object that can be used to render views or view files.
</span><span>141</span>      <span>*/</span>
<span>142</span>     <span>public</span><span> function getView()
</span><span>143</span> <span>    {
</span><span>144</span>         <span>if</span> ($<span>this</span>->_view === <span>null</span><span>) {
</span><span>145</span>             $<span>this</span>->_view = Yii::$app->getView();<span>//</span><span>如果视图对象为空，调用getView()取得视图对象实例</span>
<span>146</span> <span>        }
</span><span>147</span> 
<span>148</span>         <span>return</span> $<span>this</span>-><span>_view;
</span><span>149</span> <span>    }
</span><span>150</span> 
<span>151</span>     <span>/*</span><span>*
</span><span>152</span> <span>     * Sets the view object to be used by this widget. 设置当前部件调用的视图对象实例
</span><span>153</span> <span>     * @param View $view the view object that can be used to render views or view files.
</span><span>154</span>      <span>*/</span>
<span>155</span>     <span>public</span><span> function setView($view)
</span><span>156</span> <span>    {
</span><span>157</span>         $<span>this</span>->_view = $view;<span>//</span><span>要用的视图对象</span>
<span>158</span> <span>    }
</span><span>159</span> 
<span>160</span>     <span>/*</span><span>*
</span><span>161</span> <span>     * Executes the widget. 执行部件
</span><span>162</span> <span>     * @return string the result of widget execution to be outputted.
</span><span>163</span> <span>     * 控件执行的结果输出。
</span><span>164</span>      <span>*/</span>
<span>165</span>     <span>public</span><span> function run()
</span><span>166</span> <span>    {
</span><span>167</span> <span>    }
</span><span>168</span> 
<span>169</span>     <span>/*</span><span>*
</span><span>170</span> <span>     * Renders a view.
</span><span>171</span> <span>     * The view to be rendered can be specified in one of the following formats:
</span><span>172</span> <span>     * 渲染一个视图   实际调用View类中的同名方法 渲染的视图可以用下列方式指定路径
</span><span>173</span> <span>     * - path alias (e.g. "@app/views/site/index");
</span><span>174</span> <span>     * - absolute path within application (e.g. "//site/index"): the view name starts with double slashes.
</span><span>175</span> <span>     *   The actual view file will be looked for under the [[Application::viewPath|view path]] of the application.
</span><span>176</span> <span>     * - absolute path within module (e.g. "/site/index"): the view name starts with a single slash.
</span><span>177</span> <span>     *   The actual view file will be looked for under the [[Module::viewPath|view path]] of the currently
</span><span>178</span> <span>     *   active module.
</span><span>179</span> <span>     * - relative path (e.g. "index"): the actual view file will be looked for under [[viewPath]].
</span><span>180</span> <span>     *
</span><span>181</span> <span>     * If the view name does not contain a file extension, it will use the default one `.php`.
</span><span>182</span> <span>     *
</span><span>183</span> <span>     * @param string $view the view name.   视图名
</span><span>184</span> <span>     * @param array $params the parameters (name-value pairs) that should be made available in the view.
</span><span>185</span> <span>     * 在视图中可用的参数
</span><span>186</span> <span>     * @return string the rendering result. 渲染结果
</span><span>187</span> <span>     * @throws InvalidParamException if the view file does not exist.
</span><span>188</span>      <span>*/</span>
<span>189</span>     <span>public</span> function render($view, $<span>params</span> =<span> [])
</span><span>190</span> <span>    {
</span><span>191</span>         <span>//</span><span>调用view类中的render渲染指定的视图</span>
<span>192</span>         <span>return</span> $<span>this</span>->getView()->render($view, $<span>params</span>, $<span>this</span><span>);
</span><span>193</span> <span>    }
</span><span>194</span> 
<span>195</span>     <span>/*</span><span>*
</span><span>196</span> <span>     * Renders a view file. 渲染一个视图文件 同上
</span><span>197</span> <span>     * @param string $file the view file to be rendered. This can be either a file path or a path alias.
</span><span>198</span> <span>     * @param array $params the parameters (name-value pairs) that should be made available in the view.
</span><span>199</span> <span>     * @return string the rendering result.
</span><span>200</span> <span>     * @throws InvalidParamException if the view file does not exist.
</span><span>201</span>      <span>*/</span>
<span>202</span>     <span>public</span> function renderFile($file, $<span>params</span> =<span> [])
</span><span>203</span> <span>    {
</span><span>204</span>         <span>return</span> $<span>this</span>->getView()->renderFile($file, $<span>params</span>, $<span>this</span><span>);
</span><span>205</span> <span>    }
</span><span>206</span> 
<span>207</span>     <span>/*</span><span>*
</span><span>208</span> <span>     * Returns the directory containing the view files for this widget. 返回视图文件路径
</span><span>209</span> <span>     * The default implementation returns the 'views' subdirectory under the directory containing the widget class file.
</span><span>210</span> <span>     * @return string the directory containing the view files for this widget.
</span><span>211</span>      <span>*/</span>
<span>212</span>     <span>public</span><span> function getViewPath()
</span><span>213</span> <span>    {
</span><span>214</span>         $<span>class</span> = <span>new</span> ReflectionClass($<span>this</span><span>);
</span><span>215</span>         <span>//</span><span>取得部件类文件的目录，拼接为视图目录</span>
<span>216</span>         <span>return</span> dirname($<span>class</span>->getFileName()) . DIRECTORY_SEPARATOR . <span>'</span><span>views</span><span>'</span><span>;
</span><span>217</span> <span>    }
</span><span>218</span> }

 

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1137258.htmlTechArticleyii2源码学习笔记(二十），yii2源码学习笔记 Widget类是所有部件的基类。yii2\base\Widget.php 1 ? php 2 /* * 3 * @link http://www.yiiframework.com/ 4 * @copyri...
声明
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn
相关文章
Python在软件源码保护中的应用实践Python在软件源码保护中的应用实践Jun 29, 2023 am 11:20 AM

Python语言作为一种高级编程语言，具有简单易学、易读易写等特点，在软件开发领域中得到了广泛的应用。然而，由于Python的开源特性，源代码很容易被他人轻易获取，这就给软件源码保护带来了一些挑战。因此，在实际应用中，我们常常需要采取一些方法来保护Python源代码，确保其安全性。在软件源码保护中，有多种针对Python的应用实践可供选择。下面将介绍几种常见

idea如何查看tomcat的源码idea如何查看tomcat的源码Jan 25, 2024 pm 02:01 PM

idea查看tomcat源码的步骤：1、下载Tomcat源代码；2、在IDEA中导入Tomcat源代码；3、查看Tomcat源代码；4、理解Tomcat的工作原理；5、注意事项；6、持续学习和更新；7、使用工具和插件；8、参与社区和贡献。详细介绍：1、下载Tomcat源代码，可以从Apache Tomcat的官方网站上下载源代码包，通常这些源代码包是以ZIP或TAR格式等等。

从零开始学Spring Cloud从零开始学Spring CloudJun 22, 2023 am 08:11 AM

作为一名Java开发者，学习和使用Spring框架已经是一项必不可少的技能。而随着云计算和微服务的盛行，学习和使用SpringCloud成为了另一个必须要掌握的技能。SpringCloud是一个基于SpringBoot的用于快速构建分布式系统的开发工具集。它为开发者提供了一系列的组件，包括服务注册与发现、配置中心、负载均衡和断路器等，使得开发者在构建微

yii2 怎么去掉jqueryyii2 怎么去掉jqueryFeb 17, 2023 am 09:55 AM

yii2去掉jquery的方法：1、编辑AppAsset.php文件，注释掉变量$depends里的“yii\web\YiiAsset”值；2、编辑main.php文件，在字段“components”下面添加配置为“'yii\web\JqueryAsset' => ['js' => [],'sourcePath' => null,],”即可去掉jquery脚本。

PHP代码在浏览器中如何显示源码而不被解释执行？PHP代码在浏览器中如何显示源码而不被解释执行？Mar 11, 2024 am 10:54 AM

PHP代码在浏览器中如何显示源码而不被解释执行？PHP是一种服务器端脚本语言，通常用于开发动态网页。当PHP文件在服务器上被请求时，服务器会解释执行其中的PHP代码，并将最终的HTML内容发送到浏览器以供显示。然而，有时我们希望在浏览器中直接展示PHP文件的源代码，而不是被执行。本文将介绍如何在浏览器中显示PHP代码的源码，而不被解释执行。在PHP中，可以使

vue能显示源码吗vue能显示源码吗Jan 05, 2023 pm 03:17 PM

vue能显示源码，vue查看看源码的方法是：1、通过“git clone https://github.com/vuejs/vue.git”获取vue；2、通过“npm i”安装依赖；3、通过“npm i -g rollup”安装rollup；4、修改dev脚本；5、调试源码即可。

网站在线看源码网站在线看源码Jan 10, 2024 pm 03:31 PM

可以使用浏览器的开发者工具来查看网站的源代码，在Google Chrome浏览器中：1、打开 Chrome 浏览器，访问要查看源代码的网站；2、右键单击网页上的任何位置，然后选择“检查”或按下快捷键 Ctrl + Shift + I打开开发者工具；3、在开发者工具的顶部菜单栏中，选择“Elements”选项卡；4、看到网站的 HTML 和 CSS 代码即可。

golang框架源码学习与应用全面指南golang框架源码学习与应用全面指南Jun 01, 2024 pm 10:31 PM

通过理解Golang框架源码，开发者可以掌握语言精髓和扩展框架功能。首先，获取源码并熟悉其目录结构。其次，阅读代码、跟踪执行流和理解依赖关系。实战案例展示了如何应用这些知识：创建自定义中间件并扩展路由系统。最佳实践包括分步学习、避免盲目复制粘贴、利用工具和参考在线资源。

See all articles

热AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智能驱动的应用程序，用于创建逼真的裸体照片

AI Clothes Remover

AI Clothes Remover

用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool

Undress AI Tool

免费脱衣服图片

Clothoff.io

Clothoff.io

AI脱衣机

AI Hentai Generator

AI Hentai Generator

免费生成ai无尽的。

显示更多

热门文章

R.E.P.O.能量晶体解释及其做什么（黄色晶体）
2 周前By尊渡假赌尊渡假赌尊渡假赌
仓库：如何复兴队友
4 周前By尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island冒险：如何获得巨型种子
3 周前By尊渡假赌尊渡假赌尊渡假赌
击败分裂小说需要多长时间？
3 周前ByDDD
R.E.P.O.保存文件位置：在哪里以及如何保护它？
3 周前ByDDD
显示更多

热工具

DVWA

DVWA

Damn Vulnerable Web App (DVWA) 是一个PHP/MySQL的Web应用程序，非常容易受到攻击。它的主要目标是成为安全专业人员在合法环境中测试自己的技能和工具的辅助工具，帮助Web开发人员更好地理解保护Web应用程序的过程，并帮助教师/学生在课堂环境中教授/学习Web应用程序安全。DVWA的目标是通过简单直接的界面练习一些最常见的Web漏洞，难度各不相同。请注意，该软件中

Atom编辑器mac版下载

Atom编辑器mac版下载

最流行的的开源编辑器

Dreamweaver Mac版

Dreamweaver Mac版

视觉化网页开发工具

PhpStorm Mac 版本

PhpStorm Mac 版本

最新（2018.2.1 ）专业的PHP集成开发工具

SecLists

SecLists

SecLists是最终安全测试人员的伙伴。它是一个包含各种类型列表的集合，这些列表在安全评估过程中经常使用，都在一个地方。SecLists通过方便地提供安全测试人员可能需要的所有列表，帮助提高安全测试的效率和生产力。列表类型包括用户名、密码、URL、模糊测试有效载荷、敏感数据模式、Web shell等等。测试人员只需将此存储库拉到新的测试机上，他就可以访问到所需的每种类型的列表。

显示更多

热门话题

gmail邮箱登陆入口在哪里
7316
9
Java教程
1625
14
CakePHP 教程
1349
46
Laravel 教程
1261
25
PHP教程
1208
29
显示更多