https://blog.youkuaiyun.com/mossaderzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/mossader/article/details/6821815https://blog.youkuaiyun.com/mossader/article/details/6821815mossaderMon, 26 Sep 2011 13:18:35 +0800https://blog.youkuaiyun.com/mossader/article/details/6587981https://blog.youkuaiyun.com/mossader/article/details/6587981mossaderWed, 06 Jul 2011 14:14:50 +0800https://blog.youkuaiyun.com/mossader/article/details/6583400https://blog.youkuaiyun.com/mossader/article/details/6583400mossaderMon, 04 Jul 2011 14:06:26 +0800https://blog.youkuaiyun.com/mossader/article/details/6583396https://blog.youkuaiyun.com/mossader/article/details/6583396mossaderMon, 04 Jul 2011 14:05:20 +0800https://blog.youkuaiyun.com/mossader/article/details/6556813https://blog.youkuaiyun.com/mossader/article/details/6556813mossaderMon, 20 Jun 2011 17:34:00 +0800https://blog.youkuaiyun.com/mossader/article/details/6387002https://blog.youkuaiyun.com/mossader/article/details/6387002mossaderTue, 03 May 2011 13:44:00 +08001. 如果一个方法可静态化，就对它做静态声明。速率可提升至4倍。　
2.echo 比 print 快。
3.使用echo的多重参数（译注：指用逗号而不是句点）代替字符串连接。
4.在执行for循环之前确定最大循环数，不要每循环一次都计算最大值。
5.注销那些不用的变量尤其是大数组，以便释放内存。
6.尽量避免使用__get，__set，__autoload。
7.require_once()代价昂贵。]]>https://blog.youkuaiyun.com/mossader/article/details/6343354https://blog.youkuaiyun.com/mossader/article/details/6343354mossaderSat, 23 Apr 2011 10:56:00 +0800安装哪一个呢？对性能会有什么影响呢？有时间要测试一下。
从别处看来的。
程序环境非必要Zend Optimizer的情况下，首选pecl-APC（它和Zend Optimizer不兼容）。
总结：
1.PHP缓冲（加速）首选pecl-APC，兼容性和性能表现都非常优秀。
2.如果你的PHP环境需要Zend Optimizer，就安装eAccelerator，并把Zend Optimizer的压缩级别调到0。
zend opt]]>https://blog.youkuaiyun.com/mossader/article/details/6324047https://blog.youkuaiyun.com/mossader/article/details/6324047mossaderThu, 14 Apr 2011 19:37:00 +0800https://blog.youkuaiyun.com/mossader/article/details/6314799https://blog.youkuaiyun.com/mossader/article/details/6314799mossaderMon, 11 Apr 2011 10:24:00 +0800这个函数功能很强大。所以很危险。
 
比如在你的linux机器上运行
 
select load_file(0x2F6574632F706173737764);
 
看看结果是什么？这应该不是我们希望看到的。
 
所以我们禁用这个函数吧。
 
这个主要通过mysql授权来禁用这个函数，收回用户的file权限
 
revoke file on *.* from 'user'@]]>https://blog.youkuaiyun.com/mossader/article/details/6314731https://blog.youkuaiyun.com/mossader/article/details/6314731mossaderMon, 11 Apr 2011 10:08:00 +0800手册上是这样说的：
 
GROUP_CONCAT([DISTINCT] expr [,expr ...][ORDER BY {unsigned_integer | col_name | expr}[ASC | DESC] [,col_name ...]][SEPARATOR str_val])
 
通常这个函数是和group by一起使用的。
 
效果是把想要查询的分组中的某个其他字段使用符号连接起来，按一条数据查询出来。
https://blog.youkuaiyun.com/mossader/article/details/6289301https://blog.youkuaiyun.com/mossader/article/details/6289301mossaderWed, 30 Mar 2011 16:51:00 +0800https://blog.youkuaiyun.com/mossader/article/details/6289026https://blog.youkuaiyun.com/mossader/article/details/6289026mossaderWed, 30 Mar 2011 15:47:00 +0800由于5.3去掉了get_magic_quotes_gpc函数，所以自己写了一个防注入的函数。
 
function sql_injection($content){ if (is_array($content)){ foreach ($content as $key=>$value){ if (is_array($value)){ foreach ($value as $k=>$val){ if (!get_magic_quotes_g]]>https://blog.youkuaiyun.com/mossader/article/details/6288666https://blog.youkuaiyun.com/mossader/article/details/6288666mossaderWed, 30 Mar 2011 14:22:00 +0800前言：PHP是一门托管型语言，在PHP编程中程序员不需要手工处理内存资源的分配与释放（使用C编写PHP或Zend扩展除外），这就意味着 PHP本身实现了垃圾回收机制（Garbage Collection）。现在如果去PHP官方网站（php.net）可以看到，目前PHP5的两个分支版本PHP5.2和PHP5.3是分别更新的，这 是因为许多项目仍然使用5.2版本的PHP，而5.3版本对5.2并不是完全兼容。PHP5.3在PHP5.2的基础上做了诸多改进，其中垃圾回收算法就 属于一个比较大的]]>https://blog.youkuaiyun.com/mossader/article/details/6212685https://blog.youkuaiyun.com/mossader/article/details/6212685mossaderMon, 28 Feb 2011 11:19:00 +0800插入数据：TestSet.rb
# encoding: utf-8 require 'rubygems' require 'cassandra/0.7' include Cassandra::Constants client = Cassandra.new('keyspace1') temp = {'name' => 'TestName','age' => 28} client.insert(:standard1, 'TestUser', temp)
虽然使用了e]]>https://blog.youkuaiyun.com/mossader/article/details/6212624https://blog.youkuaiyun.com/mossader/article/details/6212624mossaderMon, 28 Feb 2011 10:54:00 +0800https://blog.youkuaiyun.com/mossader/article/details/6193736https://blog.youkuaiyun.com/mossader/article/details/6193736mossaderFri, 18 Feb 2011 16:53:00 +0800https://blog.youkuaiyun.com/mossader/article/details/6193608https://blog.youkuaiyun.com/mossader/article/details/6193608mossaderFri, 18 Feb 2011 16:09:00 +08001，安装jdk，设置JAVA_HOME，解压缩cassandra，设置CASSANDRA_HOME为E:/apache-cassandra-0.7.1。运行apache-cassandra-0.7.1/bin/cassandra.bat启动服务器。

2，运行cassandra-cli.bat启动客户端。感觉与mysql差不多的命令方式。
connect 127.0.0.1/9160; show keyspaces;

可以看到一个叫s]]>https://blog.youkuaiyun.com/mossader/article/details/6193516https://blog.youkuaiyun.com/mossader/article/details/6193516mossaderFri, 18 Feb 2011 15:35:00 +0800