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PHP4
What is ...?
- a programming language based on the syntax of C++
- developed for use as a scripting language for Web Servers
- PHP4 programs are interpreted, not compiled
- programs run in a web server
- all data entered in a form become variables for the php4 program
Where do I get it?
- php4 is available for free download at www.php.net
- you need a web server to run programs in php4
- a web server can be dowloaded free from www.apache.org
How do I run a php program?
- store your program with extension .php4
- either you directly address your program (www.myserver.com/myfolder/myprogram.php4) or
- a web page links to your program (submit button -> form action= "myprogram.php4")
How do I write the program?
- your php program must be included between the markers <? and ?>
- all variables must start with $
- a variable may contain integers, floating points or strings of characters
How do I display my results?
- you can use echo to output
- you can include html statements in the program
How do I input values?
- you can only input values using a web page with forms.
- the values in the forms will become variables in your php program
- name of the form field is the name of the variable in the program
Can I test a program in php4?
YES!
prepare a php4 program using any text editor
in your login page, select upload programs