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PHP 5.3 or later, using the pthreads PHP extension, you can make PHP really support multi-threading. Multithreading in the processing of repetitive cyclic tasks, can greatly shorten the program execution time.As I said in my previous article, most

All stems from an experiment, please see the following example: Table: Copy Code code as follows: CREATE TABLE IF not EXISTS ' foo ' ( ' A ' int (a) unsigned not NULL auto_increment, ' B ' int (a) unsigned not NULL, ' C '

Do you use Is_file or file_exists to determine whether a file exists? In writing procedures found in the determination of the existence of documents, there are two ways to write, some people used is_file, some people use file_exists, which better

This article illustrates the PHP implementation method of Memcache consistent hash. Share to everyone for your reference. Specifically as follows: Recently looking at some of the distributed aspects of the article, so the use of PHP to achieve

But because of the number of phone parameters, and different mobile phone parameters vary greatly, so the parameter table structure is usually a vertical table (a parameter is a row), rather than a horizontal table (a parameter is a column), at this

Concept Here to borrow a picture of Baidu Encyclopedia, very image: The fast sorting algorithm is an optimization of the bubbling algorithm. His idea was to divide the array into groups, and to put the values of the large elements in a temporary

In the snapping scene, make sure two points:1. Inventory will not be reduced/less sold2. Speed of execution on 1 basisI tested two scenarios,Programme I. MySQL Open transactionI simply designed the inventory table as followsCREATE TABLE ' La_store '

MySQL extension for PHP Advantages and DisadvantagesDesign and development allows an early extension of PHP applications to interact with the MySQL database. The MySQL extension provides a process-oriented interface;and is designed for MySQL4.1.3

classMemcachehash {Private $_node=Array(); Private $_nodedata=Array(); Private $_keynode= 0; Private $_memcache=NULL; //number of virtual nodes per physical server [Note: The more the number of nodes, the better the cache distribution uniformity,

1. Read and Write locks are distinguished.If a write lock is used each time, multiple processes will be queued to read one file. This is definitely not efficient.2. distinguish between blocking and non-blocking modes.In general, if a process is

PHP pthread multithreaded Application Demo:Class Testthread extends thread{Public $text;Public Function run () {$this->text = file_get_contents ("http://www.buyigang.com");}}$threads = Array ();$time = Microtime (true);for ($i =0; $i $threads [$i] =

PHP5.3 and later versions use the pthreadsPHP extension to enable PHP to truly support multithreading. Multithreading can greatly shorten the execution time of repetitive cyclic tasks. As I mentioned in my previous article, the performance

Copy codeThe Code is as follows:/************ By garcon1986 *********/// Difference between print and echo:// 1. echo can input multiple strings, but print cannot.Print "hello". "world"; // succeededEcho "hello". "world"; // success// Print "hello",

This article introduces how to upload and rename images in php. For more information, see I. Application scenarios: the auto-increment numbers returned from the database cannot be used to rename the uploaded image. This is determined by the process

We often optimize cache settings on the server, but we seldom pay attention to the client cache, accurate to the browser cache mechanism. In fact, each browser has a cache policy, which temporarily caches each browsed file in a special folder. When

A detailed description of the six solutions for renaming uploaded images based on php. I. application scenarios: the auto-increment numbers returned from the database cannot be used to rename the uploaded image. This is determined by the process of

Php records the page code execution time. To record the code execution time on the page in php, we only use the microtime function to generate the time, and then subtract the start and end time at the end to solve the problem. The core code is as

One, applicable scenario: cannot use the self-growth number returned from the database to rename the uploaded image. This is determined by the process of picture or file upload.General image upload process is to upload images to the server, after

Php development tips 1: Below are nine useful functions in PHP. do you know you have used them? 1. any number of function parameters you may know that PHP allows you to define a function with default parameters. But you may not know that PHP also

Recently (looks like the 28th) from abroad (address: http://nikic.github.com/2011/12/28/Supercolliding-a-PHP-array.html) broke out a new PHP conflict on the Array, you can call the hash table conflict to launch a denial of service attack on the