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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...（如Windows Explorer扩展开发）。
环境
shell编程跟java、php编程一样，只要有一个能编写代码的文本编辑器和一个能解释执行的脚本解释器就可以了。
OS
当前主流的操作系统都支持shell编程，本文档所述的shell编程是指Linux下的sh...
How can I store my users' passwords safely?
...tials';
}
(In case you are still using legacy 5.3.7 or newer you can install ircmaxell/password_compat to have access to the build-in functions)
Improving upon salted hashes: add pepper
If you want extra security, the security folks now (2017) recommend adding a 'pepper' to the (automatically)...
Check whether an array is empty [duplicate]
...pty($errors)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() construct will always return true if there is at least one element even with "empty" value.
...
Laravel migration: unique key is too long, even if specified
...
Specify a smaller length for your e-mail:
$table->string('email', 250);
Which is the default, actually:
$table->string('email');
And you should be good.
For Laravel 5.4 you can find a solution in this Laravel 5.4: Specified ...
App Inventor 2 EV3超声波传感器教程 · App Inventor 2 中文网
... 单次读取
实战案例：避障小车
EV3端准备
常见问题
Q1: 无法连接EV3？
Q2: 超声波读数为0或负数？
Q3: 读取速度慢？
总结
« 返回首页
概述
App Inventor 2提供LEGO MINDSTORMS EV3组件...
PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...you either go with that or you check the host name against a white list:
$allowed_hosts = array('foo.example.com', 'bar.example.com');
if (!isset($_SERVER['HTTP_HOST']) || !in_array($_SERVER['HTTP_HOST'], $allowed_hosts)) {
header($_SERVER['SERVER_PROTOCOL'].' 400 Bad Request');
exit;
}
...
App Inventor 2 中文网VIP专享内容 · App Inventor 2 中文网
...档，专业作品源码，专业技术文章，专业技术指导，专业问题解决思路等。
第三方产品接入
【百度网盘】App Inventor 2 接入百度网盘API
【文件上传】App Inventor 2 实现上传文件到服务器全方案总结
【云存图...
How can I get useful error messages in PHP?
...ple syntax error (wrong bracket, missing semicolon), or a failed function call, or something else entirely.
43 Answers
...
How do I remove all specific characters at the end of a string in PHP?
...
using rtrim replaces all "." at the end, not just the last character
$string = "something here..";
echo preg_replace("/\.$/","",$string);
share
|
...
warning C4996 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可能会产生诸如内存泄露、缓冲区溢出、非法访问等安全问题。这些函数如：strcpy、strcat等。
对于这些问题，VC2005建议使用这些函数的更高级的安全版本，即在这些函数名后面加了一个_s的函数。这些安全版本函数使用起来更...