Balance K1066BI – Graphical Design Teppo Räisänen [email protected].
PHP-language Variables, assingment and arithmetic operations Teppo Räisänen Principal Lecturer...
7
PHP-language Variables, assingment and arithmetic operations Teppo Räisänen Principal Lecturer Oulu University of Applied Sciences School of Business and Information Management [email protected], 050 382 6587
-
Upload
horatio-barton -
Category
Documents
-
view
216 -
download
3
Transcript of PHP-language Variables, assingment and arithmetic operations Teppo Räisänen Principal Lecturer...
PHP-languageVariables, assingment and arithmetic
operations
Teppo RäisänenPrincipal Lecturer
Oulu University of Applied SciencesSchool of Business and Information Management
[email protected], 050 382 6587
Variables
• Data prosessed by (web) application is stored into variables
• PHP-application is executed on web server -> variables are in the memory of the web server
• When you declare a variable, you don’t give datatype (but still variables do have datatype) -> PHP is so called loosely-typed programming language
• Basic datatypes: boolean, integer, floating point number and string
Declaring variables
• Variable declaring starts with $-character• You invent the name for the variable• Good practise is to give initial value• Example:
$age=0;$firstname=””;$isTrue=false;
Assignment (= operator)
• Assingment is used to store data into variable– User input– Result of an clause
• Examples.$age=24;$name=$_POST[”firstname”];$total=$number1 + $number2;$fullname=$firstname . $surname;
Arithmetic operations
• + addition• - subtraction• / division• * multiplication• % remainder
Printing information with PHP
• echo, print ja printf
Reading values from HTML-form using HTTP-post method
