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List of standard lengths for database fields
...those were over 25, and they were all cases where data imports resulted in extra junk winding up in that field.)
Last name was similar to first name.
Email addresses maxed out at 62
characters. Most of the longer ones
were actually lists of email
addresses separated by semicolons.
Street address ma...
Convert line-endings for whole directory tree (Git)
...r - search, filter and replace text data
sfk addhead - insert string at start of text lines
sfk addtail - append string at end of text lines
sfk patch - change text files through a script
sfk snapto - join many text files into one file
sfk joinlines ...
What is the most accurate way to retrieve a user's correct IP address in PHP?
...
We use:
/**
* Get the customer's IP address.
*
* @return string
*/
public function getIpAddress() {
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
return $_SERVER['HTTP_CLIENT_IP'];
} else if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$ips = explode(',', $_SER...
ZeroMQ的学习和研究（PHP代码实例） - C/C++ - 清泛网 - 专注C/C++及内核技术
... Client 端是一样的，而 Server 端的不同是，他不需要监听端口，而是需要连接 Broker 的端口，接受需要处理的信息。所以，我们重点阅读 Broker 的代码：
<?php
/*
* Simple request-reply broker
* @author Ian Barber <ian (dot) barber (at) gmail (dot) c...
Windows下通过端口号查找出对应的进程名称 - 更多技术 - 清泛网 - 专注C/C+...
Windows下通过端口号查找出对应的进程名称有时，看到电脑在监听一个端口，但不知道是哪个程序在监听此端口，此时就可以用下面的方法找出该应用程序。首先打开CMD窗口，运行netstat ...有时，看到电脑在监听一个端口，但不知...
OpenSuSE 15.1 防火墙端口开放 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
OpenSuSE 15.1 防火墙端口开放opensuse-firewall-configOpenSuSE 15 1添加防火墙规则（比如3306端口）：firewall-cmd --permanent --zone=public --add-port=3306 tcp规则生效：firewall-cmd --reloadOpenSuSE 15.1添加防火墙规则（比如3306端口）：
firewall-cmd --permanent ...
Discuz邮件设置使用SSL加密发送 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...了而返回的是错误~原因是现在各大邮件服务商都关闭了25端口，只能用ssl 465端口才能发送邮件~。只需要在SMTP服务器地址前加ssl discuz有很多人没有发现自己的论坛邮箱发送不出邮件了
而返回的是错误~
原因是现在各大邮件服...
Get first n characters of a string
How can I get the first n characters of a string in PHP? What's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
...
LEGO EV3 机器人按键控制 · App Inventor 2 中文网
...人结构有所不同，不必担心，只需确保两个电机（连接到端口B和C）位于机器人的相对两侧即可。
这种类型的机器人底座被称为差分驱动平台（Differential Drive Platform）。因为机器人的行为可以根据电机速度轻松调整：
前进...
改用 443 端口连接 Github 修复 git push 时出现 Connection timed out 的...
改用 443 端口连接 Github 修复 git push 时出现 Connection timed out 的问题use-443-port-fix-github-connection-timeout参考资料最近几天我这里出现了git push出现 timeout 的问题：$ git pushssh: connect to host github com port 22: Connection timed outfatal: Could not read ...