unique string

Method One: PHP built-in function uniqid () the uniqid () function generates a unique ID based on the current time in microseconds. GrammarUniqid (prefix,more_entropy) Parameters Description Prefix Optional.

I. Upload principle and configuration 1.1 Principles: Upload client files to the server, and then move the files (temporary files) on the server to the specified directory. 1.2 required for client configuration: form page (Select Upload File);

English Original: http://developer.yahoo.com/performance/rules.htmlChinese Original: http://www.ha97.com/2710.html1. Minimize the number of HTTP requests 80% of the end-user response time is used to download the content. This part of the time

During the recent online communication, we found that there are many misunderstandings about the use of sessions. In essence, we do not understand the working principles of sessions. During the recent online communication, we found that there are

Python is a simple and simple language. Reading a good Python program is like reading English, although it is very strict. This pseudo-code feature of Python is one of its biggest strengths. It allows you to focus on solving problems rather than the

1.incrementApplies to the proxy primary key. The table identifier is automatically generated incrementally by hibernate, with each increment of 1.MysqlHibernate:select Max (ID) from usersHibernate:insert into Hjd.users (name, pass, sex, id) VALUES (?

When a SESSION is enabled, a cookie (called PHPSESSID, which can be obtained through session_name () that uniquely identifies session_id in the browser is first sent. in the case of save_handler = files, a file without a suffix is generated under

Combined arrays are previously called PLSQL tables. Union arrays cannot be used in tables. They can only be used as structures for programming. Union Arrays can only be accessed in PLSQL A union array is previously called a PL/SQL table. Union

The role of the framework is to simplify what we do, but it is flexible. Jquery is the mainstay of the js framework. It is flexible and powerful. Jquery encapsulates ajax perfectly, not to mention its powerful underlying ajax functions, but its

Oracle (1) --) Detailed description of database objects (Text explanation, first of all a small understanding ~)---- Database object: a set of logical structures ---- 1. Synonym: alias of an existing object/* function: simplify the SQL statement to

1, what is it?is used to simplify the various communication programming between HTTP client and server.2. What can be doneSimply put: With a GET or POST request, after encapsulating the URI in the specified format, the request (execute) is executed

The following articles mainly summarize the practical application skills of the Oracle explain plan. If you need to optimize the SQL statements in the Oracle database, we need to know the relevant plans to be executed, so as to make targeted

Before discussing Browser Optimization, we should first analyze what happened between initiating an HTTP request from the client and receiving the response from the user? Only when you know yourself and know yourself can you be defeated. This is why

As a PHP programmer, especially a newbie, I always know too little about the sinister nature of the Internet. it is often difficult to handle external intrusions, they do not know how hackers intrude, commit intrusions, upload vulnerabilities, SQL

This article is mainly to share with you to solve several common attack methods of PHP website development, Common Security threats in PHP website construction include: SQL injection, manipulating GET and POST variables, buffer overflow attacks,

This article is a piece of shopping cart code from the internet. it is based on php + mysql. if you need it, you can see that I also recommend a variety of shopping cart methods below, if you need it, you can check whether the shopping cart code is

The server is equivalent to a forwarding server. a terminal (such as a mobile phone or tablet) initiates a request to the server and forwards the request to the custom service (this is our specific implementation ). I. Basic principles Before you

The previous article on JS-SDK authorization to achieve the sharing interface, so here to summarize how to adjust the native camera in the inside, and upload and download images. This article describes how to enable cameras, display images locally,

Don't go in the database check Reply content: Don't go in the database check function makeCode($t) { $time = $t.mt_rand(10,99); // 要是觉得不够可以加上线程ID等。 $ce = $time[9]; $xy = array(); $xy[0] = array('A','F','D','X','G','H','K','U','P','Y','W','

Use php to generate a local unique identifier LUID /** * Returns a unique string that is unique in the local system, * The return value is a 32-character string in the format of