[Transfer] PHP can also be used_PHP tutorial

Why is PHP so popular?
Recently, PHP (Personal Hypertext Preprocessor) seems to have become the most widely used web page processing language on Linux/Unix in the past two years. Its convenience, powerful functions and OpenSource features make it the most popular web page processing language. Gradually eroding the market of traditional CGI and even MicroSoft ASP (Active Server Page) ╋ Almost all major websites recruit talents with PHP as a basic condition.
PHP does have the qualification to be so popular╋The reasons are as follows:
PHP is OpenSource software╋completely free╋and can be freely distributed╋so it attracts a lot of people to use it╋and because of this╋it attracts businesses The company develops better engines and optimization software for it (please refer to http://www.zend.com/).
PHP itself is very simple and easy to understand. The simple command syntax and some basic object-oriented processing capabilities allow novices to learn it in the shortest time.
PHP provides quite a lot of functions, including mathematical processing, string processing, network-related functions, support for various databases, image processing functions, and a large number of developers are developing various new functions for PHP. Excellent functionality and scalability.
PHP is very easy to combine with Apache╋It can be used as a module of Apache╋It is quite simple to set up and install╋Also because Apache currently occupies 60% of the global Web Server market╋PHP naturally becomes the best match for Apache.
However, the topic we want to talk about this time is not the application of PHP in web design, but the application of PHP in Shell Script. The commonly known Shell Script is probably tcsh, bash, perl or python. ╋What I'm talking about is using PHP as a Shell Script.
Installation of PHP executable file
Generally, PHP as a web page processing language needs to be compiled into an Apache module. Of course, it is not done here. Therefore, compilation is very simple. Just perform the following actions as root:
Unlock php-3.0.xx.tar.gz
cd php
configure
make
After compilation╋There is an executable file in the php directory╋The file name is php╋Copy it Just go to /usr/local/bin. Note╋If the file is too large╋you can use the strip command to remove unnecessary information in PHP╋so that the file will be much smaller.
The first program
Start writing our first PHP Shell Script program╋This example prints "Hello world!":

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