Example of how to use PHP in CMS to determine whether the system has been installed. cms example _ PHP Tutorial

Example of how to use PHP in CMS to determine whether the system has been installed. Example of how to use PHP in CMS to determine whether the system has been installed. many common cms systems today have installed programs. for the convenience of user use, before the new downloaded system is used, example of how to use PHP in CMS to determine whether the system has been installed

Many common CMS systems today have Installation Programs. for the convenience of users, the new downloaded system will determine whether the CMS system has been installed before use, if the installation is complete, a prompt is displayed, which does not require repeated installation. if the installation is not complete, the installation interface is displayed to instruct the user to install the CMS smoothly according to the steps, so how does the PHP-based CMS use code to implement this judgment mechanism? The following is an example code:

<? Phpdefine ("PHPOK_SET", true); define ("APP_ID", "www"); // define the root directory of the application! (This is not the ROOT directory of the system) This program limits the application directory to define ("ROOT", str_replace ("\\","/", dirname (_ FILE __)). "/"); // if the program goes out, change ROOT to the following line. // define ("ROOT ",". /"); // define the FRAMEWORK define (" FRAMEWORK ", ROOT. "framework/"); // check whether it has been installed. if it is not installed, go to the installation page. // We recommend that you remove this check after the installation is successful. If (! Is_file (ROOT. "data/install. lock ") // This file is generated after the system is installed. it is used to determine whether {header (" Location: install/index. php "); exit ;}?>

The above code is excerpted from PHPok and added comments to help readers understand it. it has some reference value for readers to develop their own CMS systems.

Php Open source

These website creation systems are all in the mvc mode, and those css files are stored in the folder where the template is stored. you can learn about MVC mode programming. In addition, the install. the lock file is not connected to the database. it is an installation lock file that prevents repeated installation. when you run the index in the installation file. php will first check whether this file exists. if so, the program cannot continue to install. you must delete this file before re-installation. general CMS (content management system, is what you say about the site building system) the system uses this method to determine whether the program has been installed. As a beginner in php, it is recommended that you do not view the code of those cms systems. you should first master the basic php syntax, just like learning asp, then I am dealing with more advanced problems, such as mvc programming, and so on. I am looking for a good teaching material, such as the book "elaborate on php", which is really good for beginners (and I am not doing advertising for this book, this is what I have read when I was learning php. I feel very good.) the content is very detailed. I have an mvc program design case and a cms system case tutorial. you can learn it. Don't worry. come on, you will understand.

To study the CMS system in PHP, how should we read the program structure? how can we see how it is structured? How to achieve each task

First, you must have basic knowledge of web page design and website creation to make good use of PHPCMS.

Local usage: install the Apache server (download the one-click installation version on the internet and find the one that integrates the MYSQL database), and copy the installation file to the home directory of the local website, you can install the database as Prompted. the remote use method is the same, except that the space supplier will help you install the PHP environment in advance. In addition, you must know the username and password used to connect to the database, the local name is root by default, and the password is blank!
Working Principle: PHPCMS the software adopts modular development and supports multiple classification methods. it facilitates the design, development and maintenance of personalized websites, to put it bluntly, PHPCMS combines the functional modules used by your website to build your website.

Many common CMS systems today have Installation Programs. for the convenience of users, before using the new downloaded system ,...