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How to initialize static variables

... PHP can't parse non-trivial expressions in initializers. I prefer to work around this by adding code right after definition of the class: class Foo { static $bar; } Foo::$bar = array(…); or class Foo { private stat...
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手机当上位机:用二进制协议和设备收发数据 · App Inventor 2 中文网

...实验三:开灯关灯 实验四:看半包、粘包和坏帧 常见问题 平台说明 相关文档 « 返回首页 做硬件的用户常问:单片机那边的协议是「A5 5A 开头、带长度、带校验」的一串字节,App Inventor 能不能按这种格式收发? 收到...
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腾讯Tencent开源框架介绍(持续更新) - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...,对性能监控项的异常数据进行采集和分析,输出相应的问题分析、定位与优化建议,从而帮助开发者开发出更高质量的应用。当前工具监控范围包括:崩溃、卡顿和爆内存。 6、分布式及事务: https://github.com/Tencent/phxpaxos ...
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Difference between “!==” and “==!” [closed]

Yesterday I stumbled over this when I modified PHP code written by someone else. I was baffled that a simple comparison ( if ($var ==! " ") ) didn't work as expected. After some testing I realized that whoever wrote that code used ==! instead of !== as comparison operator. I've never seen ==! ...
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.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included i

I have this error when trying to browse php files locally 8 Answers 8 ...
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Passing an array to a query using a WHERE clause

... for newbies to PHP like myself, can someone explain, or point me to a resource to explain, why this is prone to injection and how this should be done correctly to prevent that? What if the list of IDs is generated from a query immediately ...
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Fastest hash for non-cryptographic uses?

... CRC32 is pretty fast and there's a function for it: http://www.php.net/manual/en/function.crc32.php But you should be aware that CRC32 will have more collisions than MD5 or even SHA-1 hashes, simply because of the reduced length (32 bits compared to 128 bits respectively 160 bits). But ...
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How to convert an array to object in PHP?

...error Fatal error: Cannot re-assign $this in /var/www/bot/inc/twitter-bot.php on line 10 – streetparade Dec 8 '09 at 19:52 1 ...
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Default value in Doctrine

...ause inclusive) for the column the field is mapped to. You can use: <?php /** * @Entity */ class myEntity { /** * @var string * * @Column(name="myColumn", type="string", length="50") */ private $myColumn = 'myDefaultValue'; ... } PHP-level default values are ...
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how do i remove a comma off the end of a string?

... Good suggestion. However, not all concatenations may take place in PHP. In my case, I am sending a Javascript concatenated string for PHP to unravel. – Sablefoste Sep 11 '15 at 19:49 ...