Implementation of online public elective course system applet demonstration based on PHP + WeChat applet
Introduction to Php
Php, the hypertext processor, is interpreted using the Web server-side scripting language. The Web server-side scripting language is relatively easy to use. HTML installs Php syntax for Unix shells, C, C++, Java and Perl and Php is to incorporate it into traditional CGI or Perl. Php's simple syntax rules are more efficient than asset development. Additionally, Php programs encourage more dynamism and new libraries can be expected to be added. Php4.0 is completely open source code.
Currently, less than a dozen scripting languages can be used on the server side of the web, but the more commonly used ones are only compared to Php, ASP, Perl, JSP and a limited number of other scripting languages, Php has its own advantages:
(1) Cost;
(2) Based on the server;
(3) Strong support from database;
(4) The most powerful and significant feature of Php is that it can support a large number of databases, which makes it easier to write a network-based database;
(5) Simple and effective. The basic programming language Php follows rules that are simple and effective, yet its activities are powerful enough to help any type of website. This is different from Java, Perl, C++ and other programming languages.
(6) Network protocols and support for the following communication protocols are encouraged in this regard including:
①Email: IMAP, POP3,
②NMS，SNMP，
③Online News: NNTP
④Sharing account: NIS;
⑤International News Network: HTTP and Apache,
⑥ Protocol LDAP directory, as well as other functions related to the network.
Additionally, it can be easily ported to other operating systems, bringing CGI Php back to the program's website.
Php is a cross-platform web page technology that ultimately realizes the dynamic effect of web pages. Similar to JSP technology, it mixes some program-related codes in HTML and uses a language engine to execute the code. Php can realize interaction with the administrator. Convenient for administrators to use.
Php technology has many advantages. It can ignore the platform used. It only needs to be written once and can be run and used everywhere. It also has good security and multi-platform support features, and can be developed in any environment on any platform. Perform system deployment and environment expansion. It also has the support of its own powerful development tools, and can be obtained for free through many channels, which also prepares the conditions for the spread of Php technology [5][6].
Php development platform
Php is supported as most programs on Linux operating system, Apache web server, MySql database (light) operating system. Powerful free software or hardware required, Linux and Apache are perfect for small and medium-sized platforms. Required software:
(1) Php language source code.
(2)MySql source code
(3)Apache source code
This program is a free software, so after installing the software under the Linux operating system (you need to choose to install the corresponding package), it is particularly good for the environment as soon as you start installing this flexible service. Apache to start the service: start service htt pd start the MySql database: MySqld_safe -user = a good thing after all MySql Php programs can be used to treat Mozilla browser.
Php file composition
* Php file The end of the Dreamweaver file processed by Php is a text file that can be used.
In general, HTML tags and JQuery JavaScript or Php come together to reject the standards brought in by the law. Example shown below:
<？ Php
"Hello world my first Php program!" shows;
？>
Access database implementation method
(1) First introduce the web database architecture:
As shown in Figure 2-1:
Basic steps for searching the web:
Step 1: Check the consumer’s data,
Step 2: You must establish a connection to the database;
Step 3: Search the database;
Step 4: Structure of data;
Step 5: The user's results are shown.
(2) System until my MySql5.0 Php integrated development environment, such as using WAMP server is powered on, and it is easier to access the database report development environment:
A connection to the MySql database server MySql_connect-;
Syntax: Resource MySql_connect(host, username, password);
Please select the database: MySql_select_db (the name of the database link identifier);
Close the database: MySql_close();
System page display
If necessary, you can scan the QR code below the article to contact the source code.