yii2源码学习笔记(十九),yii2源码学习笔记
view剩余代码
<span> 1</span> <span>/*</span><span>* </span><span> 2</span> <span> * @return string|boolean the view file currently being rendered. False if no view file is being rendered. </span><span> 3</span> <span> * 当前正在渲染的视图文件 </span><span> 4</span> <span>*/</span> <span> 5</span> <span>public</span><span> function getViewFile() </span><span> 6</span> <span> { </span><span> 7</span> <span>return</span> end($<span>this</span>-><span>_viewFiles); </span><span> 8</span> <span> } </span><span> 9</span> <span> 10</span> <span>/*</span><span>* </span><span> 11</span> <span> * This method is invoked right before [[renderFile()]] renders a view file. </span><span> 12</span> <span> * The default implementation will trigger the [[EVENT_BEFORE_RENDER]] event. </span><span> 13</span> <span> * 前置事件,执行[renderFile()]时被调用,默认触发[[EVENT_BEFORE_RENDER]]事件 </span><span> 14</span> <span> * If you override this method, make sure you call the parent implementation first. </span><span> 15</span> <span> * @param string $viewFile the view file to be rendered. 要渲染的视图文件。 </span><span> 16</span> <span> * @param array $params the parameter array passed to the [[render()]] method. </span><span> 17</span> <span> * 参数数组传递到[render()]方法。 </span><span> 18</span> <span> * @return boolean whether to continue rendering the view file. 是否继续渲染视图文件。 </span><span> 19</span> <span>*/</span> <span> 20</span> <span>public</span> function beforeRender($viewFile, $<span>params</span><span>) </span><span> 21</span> <span> { </span><span> 22</span> $<span>event</span> = <span>new</span> ViewEvent([<span>//</span><span>实例化ViewEvent</span> <span> 23</span> <span>'</span><span>viewFile</span><span>'</span> =><span> $viewFile, </span><span> 24</span> <span>'</span><span>params</span><span>'</span> => $<span>params</span><span>, </span><span> 25</span> <span> ]); </span><span> 26</span> $<span>this</span>->trigger(self::EVENT_BEFORE_RENDER, $<span>event</span>);<span>//</span><span>触发[EVENT_BEFORE_RENDER]事件</span> <span> 27</span> <span> 28</span> <span>return</span> $<span>event</span>->isValid;<span>//</span><span>判断是否继续渲染文件</span> <span> 29</span> <span> } </span><span> 30</span> <span> 31</span> <span>/*</span><span>* </span><span> 32</span> <span> * This method is invoked right after [[renderFile()]] renders a view file. </span><span> 33</span> <span> * The default implementation will trigger the [[EVENT_AFTER_RENDER]] event. </span><span> 34</span> <span> * 后置事件,在执行[renderFile()]方法后被调用,默认触发[[EVENT_AFTER_RENDER]]事件 </span><span> 35</span> <span> * If you override this method, make sure you call the parent implementation first. </span><span> 36</span> <span> * @param string $viewFile the view file being rendered.要渲染的视图文件。 </span><span> 37</span> <span> * @param array $params the parameter array passed to the [[render()]] method. </span><span> 38</span> <span> * 参数数组传递到[render()]方法。 </span><span> 39</span> <span> * @param string $output the rendering result of the view file. Updates to this parameter </span><span> 40</span> <span> * will be passed back and returned by [[renderFile()]]. </span><span> 41</span> <span> * 返回视图渲染的结果 </span><span> 42</span> <span>*/</span> <span> 43</span> <span>public</span> function afterRender($viewFile, $<span>params</span>, &<span>$output) </span><span> 44</span> <span> { </span><span> 45</span> <span>if</span> ($<span>this</span>->hasEventHandlers(self::EVENT_AFTER_RENDER)) {<span>//</span><span>判断[EVENT_AFTER_RENDER]事件是否存在</span> <span> 46</span> $<span>event</span> = <span>new</span><span> ViewEvent([ </span><span> 47</span> <span>'</span><span>viewFile</span><span>'</span> =><span> $viewFile, </span><span> 48</span> <span>'</span><span>params</span><span>'</span> => $<span>params</span><span>, </span><span> 49</span> <span>'</span><span>output</span><span>'</span> =><span> $output, </span><span> 50</span> <span> ]); </span><span> 51</span> <span>//</span><span>触发[EVENT_AFTER_RENDER]事件</span> <span> 52</span> $<span>this</span>->trigger(self::EVENT_AFTER_RENDER, $<span>event</span><span>); </span><span> 53</span> $output = $<span>event</span>->output;<span>//</span><span>返回结果</span> <span> 54</span> <span> } </span><span> 55</span> <span> } </span><span> 56</span> <span> 57</span> <span>/*</span><span>* </span><span> 58</span> <span> * Renders a view file as a PHP script. </span><span> 59</span> <span> * 返回一个视图文件当作PHP脚本 </span><span> 60</span> <span> * This method treats the view file as a PHP script and includes the file. </span><span> 61</span> <span> * It extracts the given parameters and makes them available in the view file. </span><span> 62</span> <span> * The method captures the output of the included view file and returns it as a string. </span><span> 63</span> <span> * 将传入的参数转换为变量,包含并执行view文件,返回执行结果 </span><span> 64</span> <span> * This method should mainly be called by view renderer or [[renderFile()]]. </span><span> 65</span> <span> * </span><span> 66</span> <span> * @param string $_file_ the view file. 视图文件 </span><span> 67</span> <span> * @param array $_params_ the parameters (name-value pairs) that will be extracted and made available in the view file. </span><span> 68</span> <span> * @return string the rendering result 执行结果 </span><span> 69</span> <span>*/</span> <span> 70</span> <span>public</span> function renderPhpFile($_file_, $_params_ =<span> []) </span><span> 71</span> <span> { </span><span> 72</span> ob_start(); <span>//</span><span>打开输出缓冲</span> <span> 73</span> ob_implicit_flush(<span>false</span>); <span>//</span><span>关闭缓冲区</span> <span> 74</span> extract($_params_, EXTR_OVERWRITE);<span>//</span><span> 将一个数组转换为变量使用</span> <span> 75</span> <span> require($_file_); </span><span> 76</span> <span> 77</span> <span>return</span> ob_get_clean();<span>//</span><span>得到缓冲区的内容并清除当前输出缓冲</span> <span> 78</span> <span> } </span><span> 79</span> <span> 80</span> <span>/*</span><span>* </span><span> 81</span> <span> * Renders dynamic content returned by the given PHP statements. 渲染动态内容 </span><span> 82</span> <span> * This method is mainly used together with content caching (fragment caching and page caching) </span><span> 83</span> <span> * 用来聚合缓存的内容 </span><span> 84</span> <span> * when some portions of the content (called *dynamic content*) should not be cached. </span><span> 85</span> <span> * The dynamic content must be returned by some PHP statements. </span><span> 86</span> <span> * 渲染某些被PHP语句返回的动态内容 </span><span> 87</span> <span> * @param string $statements the PHP statements for generating the dynamic content.生成动态内容的PHP语句。 </span><span> 88</span> <span> * @return string the placeholder of the dynamic content, or the dynamic content if there is no </span><span> 89</span> <span> * active content cache currently. 动态内容占位符 如果当前没有有效的内容缓存,调用evaluateDynamicContent输出 </span><span> 90</span> <span>*/</span> <span> 91</span> <span>public</span><span> function renderDynamic($statements) </span><span> 92</span> <span> { </span><span> 93</span> <span>if</span> (!empty($<span>this</span>->cacheStack)) {<span>//</span><span>动态内容的列表不为空</span> <span> 94</span> $n = count($<span>this</span>->dynamicPlaceholders);<span>//</span><span>统计动态内容条数</span> <span> 95</span> $placeholder = <span>"</span><span><![CDATA[YII-DYNAMIC-$n]]></span><span>"</span>;<span>//</span><span>生成占位符</span> <span> 96</span> $<span>this</span>->addDynamicPlaceholder($placeholder, $statements);<span>//</span><span>添加动态内容占位符</span> <span> 97</span> <span> 98</span> <span>return</span><span> $placeholder; </span><span> 99</span> } <span>else</span> {<span>//</span><span>没有有效缓存 执行传入的PHP语句,返回执行结果</span> <span>100</span> <span>return</span> $<span>this</span>-><span>evaluateDynamicContent($statements); </span><span>101</span> <span> } </span><span>102</span> <span> } </span><span>103</span> <span>104</span> <span>/*</span><span>* </span><span>105</span> <span> * Adds a placeholder for dynamic content. 添加一个动态内容占位符 </span><span>106</span> <span> * This method is internally used. 内部使用 </span><span>107</span> <span> * @param string $placeholder the placeholder name 占位符名称 </span><span>108</span> <span> * @param string $statements the PHP statements for generating the dynamic content </span><span>109</span> <span> * 生成动态内容的PHP语句 </span><span>110</span> <span>*/</span> <span>111</span> <span>public</span><span> function addDynamicPlaceholder($placeholder, $statements) </span><span>112</span> <span> { </span><span>113</span> <span>foreach</span> ($<span>this</span>->cacheStack <span>as</span><span> $cache) { </span><span>114</span> $cache->dynamicPlaceholders[$placeholder] = $statements;<span>//</span><span>添加动态内容占位符</span> <span>115</span> <span> } </span><span>116</span> $<span>this</span>->dynamicPlaceholders[$placeholder] = $statements;<span>//</span><span>给当前视图添加动态内容占位符</span> <span>117</span> <span> } </span><span>118</span> <span>119</span> <span>/*</span><span>* </span><span>120</span> <span> * Evaluates the given PHP statements. 给定的PHP语句的值 </span><span>121</span> <span> * This method is mainly used internally to implement dynamic content feature.内部使用实现动态内容功能 </span><span>122</span> <span> * @param string $statements the PHP statements to be evaluated. PHP语句进行计算 </span><span>123</span> <span> * @return mixed the return value of the PHP statements. PHP语句的值 </span><span>124</span> <span>*/</span> <span>125</span> <span>public</span><span> function evaluateDynamicContent($statements) </span><span>126</span> <span> { </span><span>127</span> <span>return</span><span> eval($statements); </span><span>128</span> <span> } </span><span>129</span> <span>130</span> <span>/*</span><span>* </span><span>131</span> <span> * Begins recording a block. </span><span>132</span> <span> * This method is a shortcut to beginning [[Block]] </span><span>133</span> <span> * 数据块开始的标记,该方法是开始[Block]的快捷方式 </span><span>134</span> <span> * 数据块可以在一个地方指定视图内容在另一个地方显示,通常和布局一起使用 </span><span>135</span> <span> * @param string $id the block ID. 数据块标识 </span><span>136</span> <span> * @param boolean $renderInPlace whether to render the block content in place. 是否渲染块内容。 </span><span>137</span> <span> * Defaults to false, meaning the captured block will not be displayed. </span><span>138</span> <span> * @return Block the Block widget instance 数据块部件实例 </span><span>139</span> <span>*/</span> <span>140</span> <span>public</span> function beginBlock($id, $renderInPlace = <span>false</span><span>) </span><span>141</span> <span> { </span><span>142</span> <span>return</span><span> Block::begin([ </span><span>143</span> <span>'</span><span>id</span><span>'</span> => $id,<span>//</span><span>数据块唯一标识</span> <span>144</span> <span>'</span><span>renderInPlace</span><span>'</span> => $renderInPlace,<span>//</span><span>是否显示标识</span> <span>145</span> <span>'</span><span>view</span><span>'</span> => $<span>this</span><span>, </span><span>146</span> <span> ]); </span><span>147</span> <span> } </span><span>148</span> <span>149</span> <span>/*</span><span>* </span><span>150</span> <span> * Ends recording a block. 数据块结束标识 </span><span>151</span> <span>*/</span> <span>152</span> <span>public</span><span> function endBlock() </span><span>153</span> <span> { </span><span>154</span> <span> Block::end(); </span><span>155</span> <span> } </span><span>156</span> <span>157</span> <span>/*</span><span>* </span><span>158</span> <span> * Begins the rendering of content that is to be decorated by the specified view. </span><span>159</span> <span> * This method can be used to implement nested layout. For example, a layout can be embedded </span><span>160</span> <span> * in another layout file specified as '@app/views/layouts/base.php' like the following: </span><span>161</span> <span> * 开始指定的view渲染内容,用来实现嵌套布局,传入的第一个参数为布局文件的路径 </span><span>162</span> <span> * ~~~ </span><span>163</span> <span> * <?php $this->beginContent('@app/views/layouts/base.php'); ?> </span><span>164</span> <span> * ...layout content here... </span><span>165</span> <span> * <?php $this->endContent(); ?> </span><span>166</span> <span> * ~~~ </span><span>167</span> <span> * </span><span>168</span> <span> * @param string $viewFile the view file that will be used to decorate the content enclosed by this widget. </span><span>169</span> <span> * This can be specified as either the view file path or path alias.布局文件的路径或路径别名。 </span><span>170</span> <span> * @param array $params the variables (name => value) to be extracted and made available in the decorative view. </span><span>171</span> <span> * 可以在视图中运用的参数 </span><span>172</span> <span> * @return ContentDecorator the ContentDecorator widget instance 部件实例 </span><span>173</span> <span> * @see ContentDecorator </span><span>174</span> <span>*/</span> <span>175</span> <span>public</span> function beginContent($viewFile, $<span>params</span> =<span> []) </span><span>176</span> <span> { </span><span>177</span> <span>return</span><span> ContentDecorator::begin([ </span><span>178</span> <span>'</span><span>viewFile</span><span>'</span> =><span> $viewFile, </span><span>179</span> <span>'</span><span>params</span><span>'</span> => $<span>params</span><span>, </span><span>180</span> <span>'</span><span>view</span><span>'</span> => $<span>this</span><span>, </span><span>181</span> <span> ]); </span><span>182</span> <span> } </span><span>183</span> <span>184</span> <span>/*</span><span>* </span><span>185</span> <span> * Ends the rendering of content.结束渲染内容 </span><span>186</span> <span>*/</span> <span>187</span> <span>public</span><span> function endContent() </span><span>188</span> <span> { </span><span>189</span> <span> ContentDecorator::end(); </span><span>190</span> <span> } </span><span>191</span> <span>192</span> <span>/*</span><span>* </span><span>193</span> <span> * Begins fragment caching. 开始片段缓存 </span><span>194</span> <span> * This method will display cached content if it is available. </span><span>195</span> <span> * If not, it will start caching and would expect an [[endCache()]] </span><span>196</span> <span> * call to end the cache and save the content into cache. </span><span>197</span> <span> * 展示可用的缓存内容,否则将开始缓存内容直到出现[endCache()]方法 </span><span>198</span> <span> * A typical usage of fragment caching is as follows, </span><span>199</span> <span> * </span><span>200</span> <span> * ~~~ </span><span>201</span> <span> * if ($this->beginCache($id)) { </span><span>202</span> <span> * // ...generate content here </span><span>203</span> <span> * $this->endCache(); </span><span>204</span> <span> * } </span><span>205</span> <span> * ~~~ </span><span>206</span> <span> * </span><span>207</span> <span> * @param string $id a unique ID identifying the fragment to be cached.缓存片段的唯一标识 </span><span>208</span> <span> * @param array $properties initial property values for [[FragmentCache]]初始属性[FragmentCache] </span><span>209</span> <span> * @return boolean whether you should generate the content for caching. 是否生成缓存的内容。 </span><span>210</span> <span> * False if the cached version is available. </span><span>211</span> <span>*/</span> <span>212</span> <span>public</span> function beginCache($id, $properties =<span> []) </span><span>213</span> <span> { </span><span>214</span> $properties[<span>'</span><span>id</span><span>'</span>] = $id; <span>//</span><span>片段标识</span> <span>215</span> $properties[<span>'</span><span>view</span><span>'</span>] = $<span>this</span>; <span>//</span><span>调用初始化属性</span> <span>216</span> <span>/*</span><span> @var $cache FragmentCache </span><span>*/</span> <span>217</span> $cache =<span> FragmentCache::begin($properties); </span><span>218</span> <span>if</span> ($cache->getCachedContent() !== <span>false</span><span>) { </span><span>219</span> $<span>this</span>->endCache();<span>//</span><span>从缓存中读取到了缓存的内容,则渲染内容并返回 false,不再进行缓存</span> <span>220</span> <span>221</span> <span>return</span> <span>false</span><span>; </span><span>222</span> } <span>else</span><span> { </span><span>223</span> <span>return</span> <span>true</span><span>; </span><span>224</span> <span> } </span><span>225</span> <span> } </span><span>226</span> <span>227</span> <span>/*</span><span>* </span><span>228</span> <span> * Ends fragment caching. 结束片段缓存 </span><span>229</span> <span>*/</span> <span>230</span> <span>public</span><span> function endCache() </span><span>231</span> <span> { </span><span>232</span> <span> FragmentCache::end(); </span><span>233</span> <span> } </span><span>234</span> <span>235</span> <span>/*</span><span>* </span><span>236</span> <span> * Marks the beginning of a page.页面开始标记 </span><span>237</span> <span>*/</span> <span>238</span> <span>public</span><span> function beginPage() </span><span>239</span> <span> { </span><span>240</span> ob_start(); <span>//</span><span>打开输出缓冲</span> <span>241</span> ob_implicit_flush(<span>false</span>);<span>//</span><span>关闭缓冲区</span> <span>242</span> <span>243</span> $<span>this</span>-><span>trigger(self::EVENT_BEGIN_PAGE); </span><span>244</span> <span> } </span><span>245</span> <span>246</span> <span>/*</span><span>* </span><span>247</span> <span> * Marks the ending of a page. 页面结束标记 </span><span>248</span> <span>*/</span> <span>249</span> <span>public</span><span> function endPage() </span><span>250</span> <span> { </span><span>251</span> $<span>this</span>-><span>trigger(self::EVENT_END_PAGE); </span><span>252</span> ob_end_flush();<span>//</span><span>关闭输出缓冲区</span> <span>253</span> }

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mPDF
mPDF是一个PHP库,可以从UTF-8编码的HTML生成PDF文件。原作者Ian Back编写mPDF以从他的网站上“即时”输出PDF文件,并处理不同的语言。与原始脚本如HTML2FPDF相比,它的速度较慢,并且在使用Unicode字体时生成的文件较大,但支持CSS样式等,并进行了大量增强。支持几乎所有语言,包括RTL(阿拉伯语和希伯来语)和CJK(中日韩)。支持嵌套的块级元素(如P、DIV),

SublimeText3 英文版
推荐:为Win版本,支持代码提示!

MinGW - 适用于 Windows 的极简 GNU
这个项目正在迁移到osdn.net/projects/mingw的过程中,你可以继续在那里关注我们。MinGW:GNU编译器集合(GCC)的本地Windows移植版本,可自由分发的导入库和用于构建本地Windows应用程序的头文件;包括对MSVC运行时的扩展,以支持C99功能。MinGW的所有软件都可以在64位Windows平台上运行。

ZendStudio 13.5.1 Mac
功能强大的PHP集成开发环境

禅工作室 13.0.1
功能强大的PHP集成开发环境