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How do you Encrypt and Decrypt a PHP String?
...ng an AEAD construct, ALWAYS encrypt then MAC!
bin2hex(), base64_encode(), etc. may leak information about your encryption keys via cache timing. Avoid them if possible.
Even if you follow the advice given here, a lot can go wrong with cryptography. Always have a cryptography expert review your imp...
Apache .htaccess 禁止访问某目录方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...不愿意发生的意想不到的修改，这样就会造成服务器安全问题。这样你就必须考虑是否设置AllowOverride None来完全禁用.htaccess文件。
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一、开启Mod_rewrite模块
打开Apache2\co...
OS X10.9 环境下部署 QT5.3.1 常见的编译问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
OS X10.9 环境下部署 QT5.3.1 常见的编译问题出于本身对UNIX系统的好奇，以及身边一群对 Swift 语言各种推崇的苹果教徒的影响，这几天折腾起 MAC OS X来，体验下这个被无数开发者...
出于本身对UNIX系统的好奇，以及身边一群对 Swift ...
浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...）的监测，迅速定位系统故障，如发生Oracle数据库死锁等问题。
优化系统性能：精确分析系统各个组件占用系统资源情况，中间件、数据库执行效率，根据应用系统性能要求提出专家建议，保证应用在整个寿命周期内使用的系...
upstream sent too big header while reading response header from upstream
...nt to add that in ubuntu 16.04 the nginx configuration file is located at /etc/nginx/nginx.conf and the values should go inside http {...}
– Mario
Feb 26 '18 at 17:20
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What's the difference between echo, print, and print_r in PHP?
...ngs are not quoted, type information is omitted, array sizes aren't given, etc.
var_dump is usually more useful than print_r when debugging, in my experience. It's particularly useful when you don't know exactly what values/types you have in your variables. Consider this test program:
$values = ar...
Groovy executing shell commands
...ommand with env vars: envVars = ["P4PORT=p4server:2222", "P4USER=user", "P4PASSWD=pass", "P4CLIENT=p4workspace"]; workDir = new File("path"); cmd = "bash -c \"p4 change -o 1234\""; proc = cmd.execute(envVars, workDir);
– Noam Manos
Nov 5 '13 at 9:39
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linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成DROP的话)
允许loopback!(不然会导致DNS无法正常关闭等问题)
IPTABLES -A INPUT -i lo -p all -j ACCEPT (如果是INPUT DROP)
IPTABLES -A OUTPUT -o lo -p all -j ACCEPT(如果是OUTPUT DROP)
下面写OUTPUT链,OUTPUT链默认规则是ACCEPT,所以我们就写需要DROP(放弃)...
How can I convert ereg expressions to preg in PHP?
...o]', $str);
preg_match('(^hello)', $str);
preg_match('{^hello}', $str);
// etc
If your delimiter is found in the regular expression, you have to escape it:
ereg('^/hello', $str);
preg_match('/^\/hello/', $str);
You can easily escape all delimiters and reserved characters in a string by using pr...
Fatal error: Maximum execution time of 30 seconds exceeded
...
php.ini can be found in /etc/php5/apache2/php.ini.... I'm using ubuntu 13.04...
– Enissay
Sep 4 '13 at 14:18
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