大约有 40,000 项符合查询结果（耗时：0.0265秒） [XML]
What's better at freeing memory with PHP: unset() or $var = null
I realise the second one avoids the overhead of a function call ( update , is actually a language construct), but it would be interesting to know if one is better than the other. I have been using unset() for most of my coding, but I've recently looked through a few respectable classes found off t...
How do I compare two DateTime objects in PHP 5.2.8?
...ar_dump($date1 > $date2); // false
For PHP versions before 5.2.2 (actually for any version), you can use diff.
$datetime1 = new DateTime('2009-10-11'); // 11 October 2013
$datetime2 = new DateTime('2009-10-13'); // 13 October 2013
$interval = $datetime1->diff($datetime2);
echo $interval-&g...
How to check whether mod_rewrite is enable on server?
...nfiguration file, make sure the virtual host in question has the directive AllowOverride All somewhere like this:
<VirtualHost *:80>
...
<Directory "directory/of/your/.htaccess">
AllowOverride All
</Directory>
</VirtualHost>
Basically, this states to ...
Do checkbox inputs only post data if they're checked?
... behaviour is the value is only sent if the checkbox is checked. This typically means you need to have a way of remembering what checkboxes you are expecting on the server side since not all the data comes back from the form.
The default value is always "on", this should be consistent across browse...
How can I output a UTF-8 CSV in PHP that Excel will read properly?
...l for Mac does not currently support UTF-8
Update, 2017: This is true of all versions of Microsoft Excel for Mac before Office 2016. Newer versions (from Office 365) do now support UTF-8.
In order to output UTF-8 content that Excel both on Windows and OS X will be able to successfully read, you w...
JavaScript equivalent of PHP's in_array()
.../ alerts 'ph' was found
// alerts 'o' was found
Note that I intentionally did not extend the Array prototype as it is generally a bad idea to do so.
share
|
improve this answer
|
...
来自微软的一手内幕：Windows 10是怎么出炉的 - 创意 - 清泛网 - 专注C/C++及内核技术
...各种bug，他都非常耐心的在听，甚至还用邮件秒传了一个问题的解决方案给我。
他承认，干了这么多年的产品支持，自己对品质有一定偏执。很明显，他是发自内心地在乎。虽然许多人会开玩笑说，IT支持只不过是一个告诉...
What are namespaces?
...espacing does for functions and classes what scope does for variables. It allows you to use the same function or class name in different parts of the same program without causing a name collision.
In simple terms, think of a namespace as a person's surname. If there are two people named "John" yo...
Is PHP's count() function O(1) or O(n) for arrays?
Does count() really count the all the elements of a PHP array, or is this value cached somewhere and just gets retrieved?
...
小心！创业者不可不知的互联网家装惊天伪命题 - 资讯 - 清泛网 - 专注C/C++...
...便能够实时监控到整个装修过程，对于家装过程中出现的问题，用户没有必要前往装修现场，便能够完成对整个装修过程的控制……改变正在悄然发生，虽然这些改变虽然有些机械，但是它们却正在真切地发生着。
而用户也从...