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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...经常死机，登陆到终端看了一下，都是常见的 Out of memory 问题。这通常是因为某时刻应用程序大量请求 最近有位 VPS 客户抱怨 MySQL 无缘无故挂掉，还有位客户抱怨 VPS 经常死机，登陆到终端看了一下，都是常见的 Out of memory 问...
What is a Python equivalent of PHP's var_dump()? [duplicate]
...want an official string representation of some object - you use repr(). In order to have non-official (read human-readable) you can always force conversion to string: str(object), which produces info similar to php's print_r() (used much more ofter for debugging than var_dump).
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OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
OpenSSH升级后不能登录的问题升级OPENSSH 遇到头疼的问题Openssh 爆出很多安全漏洞，客户那边搞安全检查，扫描结果出来了，漏洞基本都是在openssh上面于是打算升级升...升级OPENSSH 遇到头疼的问题
Openssh 爆出很多安全漏洞，客...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...一本书上（包括老师）也不会给你为什么是-128~127，这个问题貌似看起来也很简单容易， 以至于不用去思考为什么，不是有一个整型范围的公式吗： -2^(n-1)~2^(n-1)-1 n为整型的内存占用位数，所以int类型32位 那么就是 -(2^31)~2^31 -...
PHP: Convert any string to UTF-8 without knowing the original character set, or at least try
...ever, you could try doing this:
iconv(mb_detect_encoding($text, mb_detect_order(), true), "UTF-8", $text);
Setting it to strict might help you get a better result.
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How to include() all PHP files from a directory?
... @nalply get_include_path() still cannot auto determine the loading order ( base class may be loaded AFTER extended class , resulting errors )
– Raptor
Jul 12 '13 at 6:51
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How do I use PHP namespaces with autoload?
... @user346665 you must use use Person\Barnes\David\Class1; in order to do $class = new Class1();. With use Person\Barnes\David; you must do $class = new David\Class1();. The use keyword by itself is the equivalent of use Person\Barnes\David\Class1 as Class1; or use Person\Barnes\David...
How to pass an array within a query string?
...)
See comments for examples in node.js, Wordpress, ASP.net
Maintaining order:
One more thing to consider is that if you need to maintain the order of your items (i.e. array as an ordered list), you really only have one option, which is passing a delimited list of values, and explicitly convertin...
What does the PHP error message “Notice: Use of undefined constant” mean?
...;
}
Referring to a class constant without specifying the class scope
In order to refer to a class constant you need to specify the class scope with ::, if you miss this off PHP will think you're talking about a global define().
Eg:
class MyClass {
const MY_CONST = 123;
public function my_m...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...It is not a magic bullet. All it will do is escape dangerous characters in order that they can be safe to use in a single query string. However, if you do not sanitise your inputs beforehand, then you will be vulnerable to certain attack vectors.
Imagine the following SQL:
$result = "SELECT fields...