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Certificates are generally X.509 certificates, which are then encoded by Der. Der is TLV encoded and stored by base64.   When we open ca. CRT, we will find that it is a base64 encoding. If base64 decoding is directly performed online, the decoded

1: differences between char and varchar2: Varchar2: variable-length CHAR: fixed-length the memory is allocated when a fixed-length char is defined. The following example shows the differences between varchar2 and dynamic memory allocation: SQL>

The webpage cache is controlled by the cache-control in the HTTP message header. common values include private, no-cache, Max-age, must-revalidate, etc. The default value is private http://www.jb51.net/article/34017.htm. The function of browser

  First, you need to view the current MySQL time zone, with the time_zone Parameter Mysql> show variables like '% time_zone % '; + ------------------ + -------- + | variable_name | value | + ------------------ + -------- + | system_time_zone |

Header ()Is used to send raw HTTPHeaders. See the HTTP/1.1 specification for more information on HTTPHeaders. Example 1:Copy codeThe Code is as follows: Header ("Location: http://www.jb51.net ";);Exit; // after each redirection, you must add "exit"

The function of browser review is divided into the following situations:(1) open a new windowIf the values are private, no-cache, and must-revalidate, the server will be accessed again when a new window is opened.If the max-age value is specified,

PHP time and date, PHP time and date PHP provides a large number of built-in functions, allowing developers to easily process time, greatly improving work efficiency. This section describes some common PHP date and time functions as well as date and

Set the content-type of common file types in php Headers This article describes how to set content-type for common file types in php headers. For more information, see In PHP, you can use the header function to send header information and set the

NSDate --- date //// Main. m // OC05-task-06 // Created by Xin the Great on 15-1-26. // Copyright (c) 2015 Xin the Great. all rights reserved. // # import Int main (int argc, const char * argv []) {@ autoreleasepool {// insert code here... /// /

Common http header settings for php header Functions This article mainly introduces the common http header settings of php header functions. This article provides code examples. The Code contains detailed comments. For more information, see ?

When we tried our best to improve the server load capacity, did we ever think about whether the browser also has the cache function, and we can also use the browser's cache function to reduce the server load, increase website throughput? In this

Introduction to C ++ Date and Time The C ++ standard library does not provide the so-called date type. C ++ inherits the structures and functions used by C for date and time operations. To use date-and time-related functions and structures, you must

PHP itself is a simple and powerful language, and the PHP date format is quite common. So I studied the PHP date format and will share it with you here, I hope it will be useful to you. PHP has core features such as powerful string and array

1. UNIX TimestampPhpd processes data, especially when formatting data of the time type in the database, it is necessary to convert the data of the time type to the UNIX timestamp for processing. Time data of different Database Systems Conversion is

HTTP cache mechanism, HTTP packet structure, HTTP request and response process, browser cache control, Benefits of HTTP Cache A page may have hundreds of thousands of requests. If the server needs to respond to the request every time, the load on

Speaking of the time in the computer, there are some more interesting things, such as we often hear the Unix timestamp, UTC time, GMT, and so on, from the expression they basically belong to the same thing, Because their time is said to be from 1970.

PHP code for displaying the date and time. PHP's display time code is much more powerful than ASP, making it easier to call. 1. year-month-day echodate (Y-m-j); 2012-02-6echodate (y-n-j ); 07-2-6 capital Y indicates that the code for displaying the

Explain the date () function of PHP (). PHP date and time functions date () 1, year-month-day echodate (Y-m-j); 2007-02-6echodate (y-n-j ); 07-2-6 uppercase Y indicates four digits of the year, while lowercase y indicates two digits of the year.

In-depth introduction to PHP date format: leap year, week, day. PHP itself is a simple and powerful language, and the PHP date format is quite common. so I studied the PHP date format and will share it with you here, I hope that PHP itself is a

Php implements 301 redirection jump code. In php, the 301 redirection implementation method is very simple. we only need to simply use the header to send the 301 status code and then use the header to jump. The effect is the same as that of apache,