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example implementation. Copy Code code as follows: public class Singleton { private static Singleton uniqueinstance = null; Private Singleton () { Exists only to defeat instantiation. } public static Singleton getinstance () {if (uniqueinstance = null) { Uniqueinstance = new Singleton (); } return uniqueinstance; } Other methods ...} Singleton by restricting the construction method to private, the

The routes.php usage of codeigniter configuration is analyzed in this paper. Share to everyone for your reference, specific as follows: An array named $route is defined in application/config/routes.php to set the default route and 404 pages and to set up some matching methods. The default configuration is as follows: $route [' default_controller '] = "welcome"; $route [' 404_override '] = '; DEFAULT_CONTROLLER Specifies the default controller name, 404_override specifies the nam

A few days ago some things, so this example to write until today, why take the phplib in the DB class? Many people in the study of PHP, may be the first contact with the template is Phplib, the reason is very simple: a lot of PHP learning materials are introduced phplib,phplib in PHP3 when the fire, one of the reasons is that it achieved in PHP3 did not implement the session function, Until now there are still a lot of people using phplib template tec

Shiro -- Starting from a simple example, The shiro example 1. Shiro is used for permissions. Ii. Permissions 1. Basic concepts: (1) security entity: Data to be protected. (2) Permission: whether to operate (view, modify, and delete) the data protected. 2. Two features of Permissions (1) Permission inheritance: A contains B and B without permissions, but A has permissions. In this case, B is A permission. If

A simple example of the proxy mode in the Python design mode and an example of the python Design Mode This article describes the proxy mode of the Python design mode. We will share this with you for your reference. The details are as follows: The proxy mode is generally a class function interface. Proxies can be interfaces of these things: network connections, stored objects, files, or other resources (expe

Access_token acquisition development example, access_token example. Access_token acquisition development example. access_token example overview access_token is the globally unique ticket of the public account. access_token is required when the public account calls each interface. Developer needs access_token to obtain

Smarty Simple Application example, Smarty application Example This paper describes a simple application example of Smarty. Share to everyone for your reference, as follows: Template file: Index.tpl Smarty{$hello} {section name=loop loop= $msglist} ID: {$msglist [loop].id}--{$msglist [Loop].title}----{$msglist [Loop].receiver} {/section} {sectio

php function eval () Introduction and use example, eval example What is eval ()? The eval () function calculates the string according to the PHP code.The string must be a valid PHP code and must end with a semicolon.If no return statement is called in the code string, NULL is returned. If there is a parsing error in the code, the eval () function returns FALSE. Grammar Eval (Phpcode)Copy the Code code as f

An example of the role of PHP @ at notation, at example Look at the PHP code, there are always some lines in front of the @ symbol, always do not know what the meaning. For example dede5.7 @ni =imagecreatetruecolor (Ftow, $ftoH); If you use it today, just remember it. In fact, it is the error control, that is, even if an error occurs, ignore the error message, c

PHP implements two-dimensional array de-duplication function example, two-dimensional array example This example describes how PHP implements the two-dimensional array deduplication function. We will share this with you for your reference. The details are as follows: Deduplication of two-dimensional arrays in php. For example