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How does “do something OR DIE()” work in PHP?

I'm writing a php app to access a MySQL database, and on a tutorial, it says something of the form 4 Answers ...
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SVG图像加载扩展 - 第三方扩展集合 · App Inventor 2 中文网

...定义UI组件 故障排除 常见问题 兼容性说明 开发资源 SVG设计工具 在线SVG资源 技术文档 版权信息 « 返回首页 « 返回第三...
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Anonymous recursive PHP functions

Is it possible to have a PHP function that is both recursive and anonymous? This is my attempt to get it to work, but it doesn't pass in the function name. ...
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...是为了避免不必要的拷贝。使拷贝动作高效并且防止剥离问题发生的一个简单办法是使容器包含指针而不是对象。 第4条:调用empty而不是检查size()是否为0。   理由很简单:empty对所有的标准容器都是常数时间操作,而对...
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文件增强使用指导 · App Inventor 2 中文网

...例:列出项目素材 属性、方法与事件速查 常见问题与验收 完整 .aia 源码与操作指导 设备记录文件管理 不可见组件:功能完整的文件工具箱。基于广受欢迎的 FileTools 拓展(v10)内...
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PHP + MySQL transactions examples

I really haven't found normal example of PHP file where MySQL transactions are being used. Can you show me simple example of that? ...
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What is the function __construct used for?

... __construct was introduced in PHP5 and it is the right way to define your, well, constructors (in PHP4 you used the name of the class for a constructor). You are not required to define a constructor in your class, but if you wish to pass any parameters on...
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PHP multidimensional array search by value

... or just use == instead ===. Based on angoru answer. In later versions of PHP (>= 5.5.0) you can use one-liner. $key = array_search('100', array_column($userdb, 'uid')); Here is documentation: http://php.net/manual/en/function.array-column.php. ...
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App Inventor 2 视频播放器教程 - VideoPlayer组件与WebView嵌入播放 · App Inventor 2 中文网

...冲动画 11.4 WebView 播放器的优势 十二、常见问题与解决方案 Q1:视频文件太大无法打包怎么办? Q2:视频播放时出现黑屏或无法播放? Q3:如何实现视频循环播放? Q4:如何获取视频播放进度? ...
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Google Sheets API Setup · App Inventor 2 中文网

...到一个指南,将询问有关我们正在制作的项目类型的各种问题。在”Which API are you using?”下的第一个下拉菜单中,选择Google Sheets API。 选择后,下面会出现一个后续问题。在”Where will you be calling the API from?”问题下,选择Other ...