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How to calculate the bounding box for a given lat/lng location?
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Here is a PHP implementation from the specification found at JanMatuschek.de: github.com/anthonymartin/GeoLocation.class.php
– Anthony Martin
Dec 3 '12 at 14:10
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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
程序员之网络安全系列（五）：数字证书以及12306的证书问题前文回顾假如，明明和丽丽相互不认识，明明想给丽丽写一封情书，让隔壁老王送去如何保证隔壁老王不能看到情书内容？（保密性)如何保证隔壁...前文回顾
假如，...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的处理能力，那么接收方会出现丢包。为了避免出现此类问题，流量控制要求数据传输双方在每次交互时声明各自的接收窗口「rwnd」大小，用来表示自己最大能保存多少数据，这主要是针对接收方而言的，通俗点儿说就是让发...
How to fix “Headers already sent” error in PHP
... / setrawcookie
Output can be:
Unintentional:
Whitespace before <?php or after ?>
The UTF-8 Byte Order Mark specifically
Previous error messages or notices
Intentional:
print, echo and other functions producing output
Raw <html> sections prior <?php code.
Why does it...
Null vs. False vs. 0 in PHP
...other good "nothing" entities.
What is the difference, specifically in PHP? Does it have something to do with === ?
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How to destroy an object?
...It will stay there, however if you unset the object and your script pushes PHP to the memory limits the objects not needed will be garbage collected. I would go with unset() (as opposed to setting it to null) as it seems to have better performance (not tested but documented on one of the comments fr...
PHP Fatal error: Call to undefined function json_decode()
Apache is logging PHP Fatal error: Call to undefined function json_decode() . After some googling, it seems this problem is a result of not having the latest version of php. Oddly, running php --version ouputs
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MySQL: determine which database is selected?
... currently selected? This seems very basic but I couldn't find anything on php.net or stackoverflow (all results are for "no database selected").
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迅雷发布无限节点CDN 每GB仅0.1元 - 资讯 - 清泛网 - 专注C/C++及内核技术
...欠发达地区节点资源则明显不足，这种资源分布不均匀的问题，直接影响了CDN的价值。
与众CDN服务商节点增加方式不同的是，迅雷在业内启用个人节点，通过连接至千万个家庭路由的赚钱宝们，织成一张节点均匀密布于全网的...
Memcached下一站：HandlerSocket！ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...形中让Memcached成为故障的根源：
Memcached数据一致性的问题：当MySQL数据变化后，如果不能及时有效的清理掉过期的数据，就会造成数据不一致。这在强调即时性的Web2.0时代，不可取。
Memcached崩溃后的雪崩效应：作为缓存的Memc...