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What is SQL injection? [duplicate]
...ta or even changing data that they shouldn't be allowed to do.
Example in PHP:
$password = $_POST['password'];
$id = $_POST['id'];
$sql = "UPDATE Accounts SET PASSWORD = '$password' WHERE account_id = $id";
Now suppose the attacker sets the POST request parameters to "password=xyzzy" and "id=acc...
记一次诡异的Linux程序启动即崩溃：Program received signal SIGSEGV, Segm...
...的原因是没定位出来，但是可以确定的是程序编译依赖的问题，重新整理并添加了一下程序的依赖库，重新编译后就ok了。
（程序启动即崩溃出问题的时候没有添加部分依赖库，竟然可以正常编译通过，整个过程感觉有些诡异...
Detect encoding and make everything UTF-8
...ixing UTF-8 and Latin1 in the same string.
Usage:
require_once('Encoding.php');
use \ForceUTF8\Encoding; // It's namespaced now.
$utf8_string = Encoding::toUTF8($utf8_or_latin1_or_mixed_string);
$latin1_string = Encoding::toLatin1($utf8_or_latin1_or_mixed_string);
Download:
https://github.co...
What is the difference between MySQL, MySQLi and PDO? [closed]
...
There are (more than) three popular ways to use MySQL from PHP. This outlines some features/differences PHP: Choosing an API:
(DEPRECATED) The mysql functions are procedural and use manual escaping.
MySQLi is a replacement for the mysql functions, with object-oriented and procedur...
PDO MySQL扩展模块 检测通不过？ - PHP - 清泛IT论坛，有思想、有深度
php.in中下面两行已经放开注释：
extension=pdo.so
extension=pdo_mysql.so
PDO检测仍然通不过。
终极解决方案：
php编译时加上如下参数，重新编译安装php：
--with-pdo-mysql
php编译安装完整参数请参见：http://www.tsingfun.com/html/2015/env_0826...
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...同时读写可能会有IO异常,导致drbd设备失效
为了解决这个问题则使用 gfs + cman 实现分布式文件锁方案
3.3安装cman
yum –y cman
3.4 gfs集群文件系统
在 /usr/local/drbd-utils-8.9.4/etc/drbd.conf
在配置文件的 net 选项中
all...
How are POST and GET variables handled in Python?
In PHP you can just use $_POST for POST and $_GET for GET (Query string) variables. What's the equivalent in Python?
6 ...
Function to calculate distance between two coordinates
...
这个问题问了JavaScript的答案。. You have to convert it to english :)
– VulfCompressor
Oct 12 '15 at 15:56
...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...the answer:
Just add this line before the line where you get error in your php file
ini_set('memory_limit', '-1');
It will take unlimited memory usage of server, it's working fine.
Consider '44M' instead of '-1' for safe memory usage.
...
八成企业活不过18个月 怎样避免“初创死”？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...很多创新企业提供指导。他和我聊天时，谈到创业周期的问题。他觉得创业都是一开始很顺利，然后3-4个月会出现瓶颈期，到1年左右，能够坚持下来的公司业务都慢慢稳固，进入快速发展阶段。
当然，这个时间表不是绝对的。...