String type
MySQL supports many string types, as well as many of their change types. These data types vary significantly in versions 4.1 and 5.0. It can be said to be more complicated. As early as version 4.1, each string column had its own
program | algorithm when I write a program of MD5 algorithm, I find that there are some inaccuracies in the English language description, some details
It's not clear, or very confusing. Finally have to come up with C language source program to debug,
Kangsheng's Authcode function can be said to make a significant contribution to China's PHP industry. Including Kangsheng's own products, and most Chinese companies using PHP use this function for encryption, Authcode is encrypted and decrypted
I, open and use Smarty caching To turn on the Smarty cache, simply set the caching to true in the Smarty settings parameter and specify Cache_dir. Also set the Cache_lefetime parameter to specify the cache lifetime (in seconds). If you want to
thinkphp File Cache class code sharing
From the thinkphp file cache class code, here is not much nonsense, small partners to see their own notes.
?
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FreeBSD 5.1 supports installing VMware's 3.2.1-2237 version, but its latest version has been 3.2.1-2242, so there are some problems with the ports collection installation of the system, which will be addressed in this article.
I've also tried to
Linux operating system has become a popular operating system, many people have begun to learn, the Linux operating system includes a lot of expertise, today and you talk about the Linux operating system in the RPM basic operation. It would be
There are three main types of error hints, logical and grammatical, and script run errors. One: Logic error Simple example is 1=1 1=2 these two, 1=1 and 1=2 page different principle is what? Take $sql = "SELECT * from news where Id=$_get[id]"
The user login function on the web should be the most basic function, but after I have seen some site's user login function, I feel it is necessary to write an article to teach you how to do user login function. The following article tells you that
asp.net| encryption
Encrypt class Code
/**//**//**//**********************created by chen**************************
* If you feel that my article is good, to quote please respect the work of the authors of the fruits of labor, explain
* Source and
/**
* this Java Class consists the server side for the Wondeful JavaScript library ' sha1.js '. I wrote it because I basically needed
* Some cheap client/server login authentication by the usual Key/data system. Besides, I got the creeps watching
This article mainly introduces the use of Discuz encryption and decryption function and Chinese annotation, we refer to the use of the bar Code as follows:
We should know that caching mechanism can effectively reduce the Web site's server pressure,Smarty template engine is a big bright spot for us to provide a very simple caching operation, let us learn the following.
First of all, we need to know
The timing of server generation thumbnails is generally divided into two categories:
1. Generate when uploading files
Advantages: The upload has generated the required thumbnail, read without any need to judge, reduce CPU operations.
Disadvantage:
Then we manage the server when the WINDOSW system is more intuitive, how much CPU use, how much bandwidth memory used, etc. as long as in the Remote Desktop Task Manager at a glance. But in the Linux environment is not so easy, especially the server
Now the integrity of the file verification, to prevent the file is tampered with the technology has been more mature, the general use of digital signatures, digital watermarking, and so on, I recently encountered in a project tamper-proof
Javascript| Technique | Encryption
md5($_POST['passwd'] This is the PHP general encryption method, passed over and the database originally encrypted MD5 code to compare
And the following method is through JS to achieve the MD5, in fact, this
Cloud storage brings us two big benefits, one is no longer need to hold a U disk in each computer will work documents handcuffed to, trouble not to say also easy infectious disease virus, use the Network disk tool to own free space to lose, all
Asp.net| Tips We often use JavaScript scripts for ASP.net development, such as:
private void Button1_Click (object sender, System.EventArgs e)
{
Response.Write ("");
}
It is often repeated to write these scripts, if we can make a corresponding
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