PHP

Today, the 'large Server' model has passed, replacing it with a large number of small servers, using a variety of load balancing technologies. This is a more feasible way to minimize hardware costs. The 'more servers' mode has more advantages

(1) All data should be hidden inside the class. (2) A class user must depend on the common interfaces of the class, but the class cannot depend on its users. (3) Minimize messages in the protocol of the class. (4) implement the most basic public

1. generate EXCEL files without using COM in PHP CopyCode The Code is as follows: Header ("Content-Type: Application/vnd. MS-excel "); Header ("content-Disposition: filename=test.xls "); Echo "test1 \ t "; Echo "Test2 \ t \ n "; Echo "test1 \ t ";

1 simplexml Introduction There are two traditional approaches to processing XML files: Sax and Dom. Based on the event trigger mechanism, Scan the XML file once to complete the processing. Dom constructs the entire XML file into a DOM To process

PHP header to define a PHP page as UTF or GBK Encoding The PHP page is UTF encoded. Header ("Content-Type: text/html; charset = UTF-8 "); The PHP page is GBK encoded. Header ("Content-Type: text/html; charset = gb2312 "); PHP page is big5

After complicated judgment and calculation, the IP address retrieval Function CopyCode The Code is as follows: function getip (){ If (getenv ('HTTP _ client_ip ')){ $ IP = getenv ('HTTP _ client_ip '); } Elseif (getenv ('HTTP _ x_forwarded_for ')){

Sometimes it is very useful in some scenarios. Keep it for backup. Copy codeThe Code is as follows: function is_mobile_request () { $ _ SERVER ['all _ http'] = isset ($ _ SERVER ['all _ http'])? $ _ SERVER ['all _ http']: ''; $ Mobile_browser = '0 '

Array explode (string $ separator, string $ string [, int $ limit]) This function has three parameters. The first parameter $ separator sets a delimiter (string ). The second parameter $ string specifies the string to be operated. The $ limit

Generally, use the strip_tags function of PHP to remove all html tags, remove spaces, and use substr or the cn_substr function implemented by yourself to intercept html tags. If you do not remove the html Tag first, there will be no closed tags for

1. This is a thumbnail class library. It is an open-source image thumbnail library that can be used to generate and implement various complex image thumbnails. 2. Usage Here is a simple and practical description about it. The English is relatively

This program is actually an important part of the "thief program. This program is just a part of downloading remote images. The program is easy to write and comments are made in most parts. Copy codeThe Code is as follows: if (preg_match_all ("/http:

When we need to split an array into arrays based on a character or string, explode is very happy, but you know ~ How does explode work ~~ First of all, it is certain that explode will also allocate space, without a doubt. Copy codeThe Code is as

First look at the code Copy codeThe Code is as follows: Function deldir ($ dir ){ // Delete the files in the directory first: $ Dh = opendir ($ dir ); While ($ file = readdir ($ dh )){ If ($ file! = "." & $ File! = ".."){ $ Fullpath = $ dir. "/". $

The main topic is Variable Extension System in. php Strings More data types available in. php . Type conversion . Input and use variables and constants . How to Build expressions and operators required to build expressions in php . Use the available

The framework is mainly used to implement collaborative development among multiple programmers and implement the mvc development mode. skymvc adopts the mvc development mode, and the framework itself is easy to expand. As the basic framework of

Document directory Description Copy codeThe Code is as follows: // Sprintf () function. The returned value is a formatted string. String sprintf (string $ format [, mixed $ args [, mixed $...]) $ Y = 11;$ M = 3;$ D = 9;$ Date = sprinf ('%

After reading this question, the first reaction was the relationship between namespace, but I never used simplexml to operate namespace. So I opened the manual and checked the information. The problem was not solved, google eventually solved the

So today I will talk about how to integrate your website with paypal. First, go to paypal to apply for a number. After the information is complete, we can start to take action. By the way, when applying for paypal, we need to apply for an account

The isset () function of PHP is generally used to check whether the variable is set.Format: bool isset (mixed var [, mixed var [,...]) Function: checks whether variables are set. Return Value: If the variable does not exist, FALSE is returned.If

8. constructor and constructor Most classes have a special method called constructor. When an object is created, it automatically calls the constructor. Number, that is, the constructor is automatically called when the new keyword is used to