Page 252 - Computer Software Application TP - Volume 1
P. 252
COMPUTER SOFTWARE APPLICATION - CITS
TASK 3: Setting default values for arguments
1 Open the text editor
2 Write the following codes
<html>
<body>
<?php
function setHeight(int $minheight=100)
{
echo “The height is : $minheight <br>”;
}
setHeight(350);
setHeight();
setHeight(135);
?>
</body>
</html>
3 Save the program in C:\Apache24\htdocs in a folder with .php extension
4 Run the Apache services from windows services
5 Open the browser and type the following address
http://localhost/foldername/
6 Click the php file to run and verify the output
TASK 4: Passing arguments to a function by reference
By default, function arguments are passed by value (so that if the value of the argument within the function
is changed, it does not get changed outside of the function). To allow a function to modify its arguments, they
must be passed by reference.
To have an argument to a function always passed by reference, prepend an ampersand (&) to the argument
name in the function definition:
1 Open the text editor
2 Write the following codes
<html>
<head>
237
CITS : IT & ITES - Computer Software Application - Exercise 52
