md5 function

I. OverviewWhen the total number of MySQL records exceeds 1 million, will there be a significant decrease in performance? The answer is yes, but the rate of performance degradation > varies, depends on the system architecture, applications, and >

The results of the operation are as follows:Login Page loginview.php.Press the login button, jump to the login Processing page loginview.phploginprocess.php, after the database query, login failed, jump back to the login page loginview.php, and

First, numeric type1. For integer data, MySQL supports specifying the display width within the parentheses following the type name, or int (11) If not specified, and generally with zerofill, with insufficient number of digitsFill with the character "

Reference Address: http://dev.mysql.com/doc/refman/5.6/en/partitioning.htmlWhen to use partitions Massive data Data table index is larger than server valid memory Restrictions on partitioning Most of the data table's

Note: The string functions that are provided in PHP are mostly not modified on the original string, but instead return a new formatted string.One, take out space and string fill functionA space is also a valid character and occupies a position in

Using PHP to develop applications, especially Web applications, often requires the generation of random passwords, such as user registration to generate random passwords, user reset password also need to generate a random password. Random password

When developing an Internet service, you must always keep in mind the concept of security and be in the Code of development. The PHP scripting language does not care about security issues, especially for most inexperienced developers. Whenever you

Summary of weak PHP security issues and summary of php security issues Preface I believe everyone knows that PHP is the best language in the world. The problems of PHP itself can also be regarded as an aspect of web security. In PHP, the feature is

Sometimes, we hope that the system can help us automate some functions, such as automatic password encryption, ignoring the empty, we need to take advantage of the automatic completion (fill) function.The data processing methods provided by the

PHP gives developers a great deal of flexibility, but this also poses a potential risk to security issues, the recent need to summarize the past problems, here to lend a translation of an article at the same time with their own development of some

Php provides several solutions to generate a unique id. I checked it online and found many methods: 1. md5 (time (). mt_rand (); this method has a certain probability that there will be duplicates. 2. the php built-in function uniqid () has been

This article mainly introduces the PHP forced conversion type and the security risks of remote management plug-ins. For more information, see remote management plug-ins, which are currently widely used by WordPress site administrators, it allows you

This article describes how to generate non-repeated identifiers in PHP, which involves md5 conversion of time functions, uniqid () functions, and GUID applications, for more information about how to generate non-repeated identifiers in PHP, see the

This article mainly introduces eight little-known security functions in PHP, and analyzes in detail functions such as addslashes, htmlentities, htmlspecialchars, and md5 play an important role in PHP programming security, it is very practical. if

This article mainly introduces ThinkPHP's three major automatic functions. it is an important technique in ThinkPHP and has a wide range of application values. if you need ThinkPHP, you can refer to ThinkPHP. This article describes the three major

If you are running a Web application that uses MySQL, it can store passwords or other sensitive information in the application. Protecting this data from access by hackers or prophers is an important concern, because you cannot allow unauthorized

Transmit passwords securely over normal HTTP. 1. Theoretically, in common HTTP, passwords in the form are transmitted to the server in plaintext mode for processing. This undoubtedly gives the bad guys a chance! Here we will talk about how to

With the popularization of networks, more and more network-based applications are available. Network databases are one of them. One or several servers can provide services to many customers. this method brings a lot of convenience to people, but it

This article will share with you a piece of code, phpweb Trojan scanner. If you need a friend to directly copy the code, you can use it. the code is super simple and has annotations. if you need a friend, you can refer to it without any nonsense and

PHP Data encryption has become more and more important in our lives, especially considering the large volume of transactions and transmitted data on the network. If you are interested in using security measures, you will be interested in learning a