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Coalesce function for PHP?
...HP 7 introduced a real coalesce operator:
echo $_GET['doesNotExist'] ?? 'fallback'; // prints 'fallback'
If the value before the ?? does not exists or is null the value after the ?? is taken.
The improvement over the mentioned ?: operator is, that the ?? also handles undefined variables without...
PHP: How to send HTTP response code?
...-Code: 404', true, 404);
I recommend the 2nd one. The first does work on all browsers I have tested, but some minor browsers or web crawlers may have a problem with a header line that only contains a colon. The header field name in the 2nd. variant is of course not standardized in any way and coul...
urlencode vs rawurlencode?
...php.net/manual/en/function.rawurlencode.php)
Returns a string in which all non-alphanumeric characters except -_.~ have been replaced with a percent (%) sign followed by two hex digits. This is the encoding described in » RFC 3986 for protecting literal characters from being interpreted as spec...
Multiple file upload in php
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I'm not sure <input type="file"> allows the attribute multiple - what would the expected outcome be? Browser allowing multiple files to be selected?
– Sven
Oct 3 '12 at 17:41
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What's the deal with a leading underscore in PHP class methods?
... { to give it some extra weight.
I've never heard of developers prefacing all their methods with underscores, so I can't begin to explain what causes that.
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Receive JSON POST with PHP
...ontents('php://input'), true);
This will save you the hassle of changing all $_POST to something else and allow you to still make normal post requests if you wish to take this line out.
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What is the best method to merge two PHP objects?
...bj_merged = (object) array_merge((array) $obj1, (array) $obj2);
This actually also works when objects have methods. (tested with PHP 5.3 and 5.6)
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ATL COM开发入门（二）（ActiveX/COM组件回调JS） - C/C++ - 清泛网 - 专注C/C++及内核技术
...《获得ActiveX控件所在网页的对象模型》，不过笔者没有调试成功，有兴趣的读者可以深入研究下。这里笔者提供另外一种更加简便的方式：前台传入浏览器窗口对象的IDispatch指针（js中this便是），然后通过它就可以在ATL中任意...
LVN_ITEMCHANGED通知会响应多次的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
... （图 三）
在Debug调试模式下，参考（图 一）和（图 二）可以看到当从item = 0到item = 1的选择过程中，其中两次LVN_ITEMCHANGED消息会针对item = 0这一项，可以看到NMLISTVIEW这个结构体中的uOldState...
【最全】谈如何升级aiStarter内置AI伴侣的方式及原理 - App Inventor 2 中...
...令
好处是，adb命令能够做的事情非常的多，是安卓开发调试非常常用的命令。仅使用这个命令的学习成本倒是不高，关键是如果安装失败会打印具体的失败原因，这一点非常的重要，根据失败原因去找解决方案，也是以上两种...