大约有 40,000 项符合查询结果（耗时：0.0377秒） [XML]
Catching multiple exception types in one catch block
...fining the exceptions). Even given that there are exceptions you want to "fall through", you should still be able to define a hierarchy to match your needs.
abstract class MyExceptions extends Exception {}
abstract class LetterError extends MyExceptions {}
class AError extends LetterError {}
cla...
关于虚拟屏的隐藏问题 - App应用开发 - 清泛IT社区，为创新赋能！
可不可以实现隐藏一个布局，布局内的控件也一起隐藏？你理解的非常对，就是这样的。{:8_389:}
布局内的组件跟着最外面的布局一起显示和隐藏！具体怎么隐藏 可不可以讲明白点？逍遥虎 发表于 2024-03-24 16:52
具体怎么隐藏 ...
Resize image in PHP
I'm wanting to write some PHP code which automatically resizes any image uploaded via a form to 147x147px, but I have no idea how to go about it (I'm a relative PHP novice).
...
How to change the session timeout in PHP?
...cted immediately but only whenever the session GC kicks in.
GC is a potentially expensive process, so typically the probability is rather small or even zero (a website getting huge numbers of hits will probably forgo probabilistic GC entirely and schedule it to happen in the background every X minut...
Preferred method to store PHP arrays (json_encode vs serialize)
...ciative array of data in a flat file for caching purposes. I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
...
What's the use of ob_start() in php?
...Think of ob_start() as saying "Start remembering everything that would normally be outputted, but don't quite do anything with it yet."
For example:
ob_start();
echo("Hello there!"); //would normally get printed to the screen/output to browser
$output = ob_get_contents();
ob_end_clean();
There a...
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...
PHP - how to best determine if the current invocation is from CLI or web server?
...
A small caveat about this method: it will not return "cli" when run from a cron job. There's a number od differents keys to choose from inside of $_SERVER to determine more reliably whether the request came via HTTP or not.
...
How can I add additional PHP versions to MAMP
...
Found a quick fix in the MAMP forums.
Basically it seems MAMP is only allowing 2 versions of PHP to show up. Quick fix, rename the folders you're not bothered about using, for me this meant adding an "X" to my /Applications/MAMP/bin/php/php5.4.10_X folder. Now 5.2.17 ...
MFC中使用CSplitterWnd分割窗口后视图大小的问题 - C++ UI - 清泛IT社区，为创新赋能！
使用CSplitterWnd对框架窗口进行分割之后需要根据需求设置每个分割窗口的大小，但是在通过createView(...)设置大小时，往往起不到想要的结果。
CSize sizeDummy;
m_wndSplitterH.CreateStatic(this, 2, 1);
if (!m_wndSplitterH.CreateView(0, 0, RUNTIME_CLASS(CGr...