md5 function

I. Overview When the total number of MySQL records more than 1 million, there will be a significant decline in performance? The answer is yes, but the rate of performance degradation > is different, depends on the system's architecture,

Look up the Internet, there are a lot of ways 1, MD5 (Time (). Mt_rand (1,1000000)); This method has a certain probability that there will be repetition 2. PHP built-in function uniqid () The Uniqid () function generates a unique ID based on the

The examples in this article describe 8 little-known security functions in PHP. Share to everyone for your reference. The specific analysis is as follows: Security is a very important aspect of programming. In any programming language, a number of

Make a completely dynamic password, so that the same password produces different results Password AAA After the first operation the result is: Jlce1d65ec3b91556234879c9db8f6da1123 Second time: Hjmnbe0d01cc1fbd3e18ae7431fa52fb3ce4 Third time: Grttb059

If you're running a Web application that uses MySQL, it's a great opportunity to keep passwords or other sensitive information in your application. Protecting this data from hackers or prying eyes is an important concern because you cannot allow

Even if you're using PHP for years, you'll stumble across functions and functions that you never knew about. Some of them are very useful, but not fully utilized. Not everyone will read the manual and function references from beginning to end. 1,

MySQL recently in the school system to do alumni, the need for authentication, in contrast after the decision to use Php+mysql for authentication. 　　 Have considered using cookies or session before. But with cookies, the user offline and then

This example describes the use of the Uniqid () function in PHP. Share to everyone for your reference. The specific methods are analyzed as follows: The Uniqid () function generates a unique ID based on the current time in microseconds.Note: The

The remote management plug-in is a popular utility for WordPress site administrators, which allows users to perform the same operations on multiple sites at the same time, such as updating to the latest release or installing Plug-ins. However, in

The first two days in a station version of the enterprise search engine, found that some sites can link site content. Strange under Look, the original is according to the database ID automatic numbering rules to link ~ ~ Spare time to get the

Objective I believe we all know that PHP is the best language in the world, and the problem of PHP itself can be counted as one aspect of web security. The features in PHP are weakly typed, and the built-in functions loosely handle incoming

1. Create the table, the storage engine is MyISAM, and use the MD5 function to create a hash value for the large text field blob CREATE TABLE t2 (ID varchar, content blob, Hash_value varchar) engine=myisam default Charset=utf8; 2. Inserting

MD5 and RSA are the most commonly used two algorithms in network transmission, knowing the principles of these two algorithms to know roughly what the encryption is all about. But these two algorithms use the environment to be different, just

A Brief introduction: 1. Pop applicable to C/s structure of the offline model of the e-mail protocol, has been developed to the third edition, said POP3. Offline models do not operate online, unlike IMAP4 (Netscape support IMAP4) 2. When a client

AES encrypted block packet length must be 128 bits, the key length can be 128 bits, 192 bits, 256 bits of any one (if the data block and key length is insufficient, will be filled). 3DES, also known as Triple DES, is a mode of DES encryption

The problem with generating token checksums is useful in recent projects. First consider using the Uniqid () function in PHP to generate random strings, but because the function seems to be based on the microsecond time level. In the case of high

This stored procedure is calculated MD5 value, can be used for password authentication encryption. SQL Server's extended stored procedures (Extended Stored Procedure, abbreviated XP) are implemented by registering functions encapsulated in a. dll

The front small tried a little bit scrapy Crawl blog site blog (you can see the Scrapy crawler growth Diary of the creation of the project-extract data-save in JSON format data), but the previous data is saved in JSON format in a text file. This is

Choose the right data typeWhen using MySQL to create a data table, you will encounter a problem, how to choose the appropriate data type for the field. For example, to create an employee information table, each field can be defined in many different

DescriptionMySQLdb is a Python DB api-2.0-compliant interface; See PEP-249 for details. For up-to-date versions of MYSQLDB, use the homepage link.Supported Versions:* MySQL versions from 3.23 to 5.5; 5.0 or newer recommended. MariaDB should also