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Simplest two-way encryption using PHP
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Neither 5.2 nor 5.3 are supported anymore. You should instead look into updating to a supported version of PHP, such a 5.6.
– Scott Arciszewski
Sep 6 '15 at 20:19
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Why do some C# lambda expressions compile to static methods?
...t compiler, this implementation is not required (as acknowledged by sec. M.5.3 in the C# 5.0 specification). Therefore, it is undefined whether the anonymous function is static or not. Moreover, section K.6 leaves much open as to the details of expression trees.
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call a static method inside a class?
... a static method call is taking place.
$this::staticMethod();
Since PHP 5.3 you can use $var::method() to mean <class-of-$var>::; this is quite convenient, though the above use-case is still quite unconventional. So that brings us to the most common way of calling a static method:
self::st...
Google Authenticator implementation in Python
... converts an HMAC-SHA-1
value into an HOTP value as defined in Section 5.3.
http://tools.ietf.org/html/rfc4226#section-5.3
"""
offset = int(hmac_sha1[-1], 16)
binary = int(hmac_sha1[(offset * 2):((offset * 2) + 8)], 16) & 0x7fffffff
return str(binary)
def _long_to_byte...
What is the difference between self::$bar and static::$bar in PHP?
..., you're invoking a feature called late static bindings (introduced in PHP 5.3).
In the above scenario, using self will result in Foo::$bar(1234).
And using static will result in Bar::$bar (4321) because with static, the interpreter takes takes into account the redeclaration within the Bar class du...
What is the closest thing Windows has to fork()?
...the closest thing to it I can find:
Taken from: http://doxygen.scilab.org/5.3/d0/d8f/forkWindows_8c_source.html#l00216
static BOOL haveLoadedFunctionsForFork(void);
int fork(void)
{
HANDLE hProcess = 0, hThread = 0;
OBJECT_ATTRIBUTES oa = { sizeof(oa) };
MEMORY_BASIC_INFORMATION mbi;...
linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...337 -j DROP
有些些特洛伊木马会扫描端口31337到31340(即黑客语言中的 elite 端口)上的服务。既然合法服务都不使用这些非标准端口来通信,阻塞这些端口能够有效地减少你的网络上可能被感染的机器和它们的远程主服务器进行独立通...
Generating a drop down list of timezones with PHP
...e here is that the $what parameter of listIdentifiers was only added in PHP5.3. It looks like this is also when the constants were added as well, only I still cannot find any reference in the migration guide to 5.3 or in any 5.3.x change log to back this up.
– brendo
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How to properly add cross-site request forgery (CSRF) token using PHP
...nsed and available on Github and Composer as paragonie/random_compat.
PHP 5.3+ (or with ext-mcrypt)
session_start();
if (empty($_SESSION['token'])) {
if (function_exists('mcrypt_create_iv')) {
$_SESSION['token'] = bin2hex(mcrypt_create_iv(32, MCRYPT_DEV_URANDOM));
} else {
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Android Archive Library (aar) vs standard jar
...such as layouts, drawables etc. in a JAR file. For more detail see article 5.3 "Creation and Loading" of The Java® Virtual Machine Specification.
So on the question Android Archive Library (aar) vs standard jar. The answer depends on what build tool are you using.
If you are using Android Studio ...