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mysql ha

Posted by 夏泽民 Oct 18, 2020

比如像MHA，它自己也必须搭建成Master-Slave架构，有种跌入了递归深渊的感觉。为了更好地解决外部HA模块的高可用，一致性协议进入了视野，ZooKeeper方案应运而生，用一套ZooKeeper来管理HA，系统也变得越来越复杂。

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symfony console VarDumper

Posted by 夏泽民 Oct 16, 2020

#!/usr/bin/env php <?php // application.php

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slice 内存泄露

Posted by 夏泽民 Oct 16, 2020

缩小切片并不会缩小其依赖的数组，用 Go 的术语来说，减小了切片的长度但是并没有减少容量。由于底层依赖的数组没有变动，而该数组保留了一个理论上已经被丢弃了的元素的引用，以及该元素所引用的所有其他对象。即使是代码不可见的引用被保留，Go 垃圾收集器仍然会将该元素看做是还在使用中。

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phan

Posted by 夏泽民 Oct 16, 2020

https://github.com/phan/phan https://www.fzb.me/2017-7-18-static-analysis-in-php.html Phan倾向于避免假阳性，试图证明不正确性，而不是正确性。

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php parser

Posted by 夏泽民 Oct 16, 2020

https://github.com/nikic/PHP-Parser Parsing PHP 5 and PHP 7 code into an abstract syntax tree (AST). Invalid code can be parsed into a partial AST. The AST contains accurate location information.

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