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Using a Pair of Functions

Again, your new script will generate the traditional "Hello, World!" greeting. However, this time you will introduce a pair of functions. Functions, even if not called more than once, can help make the main line of code more readable. Follow the simple steps below.

Get to the directory where you are storing your PHP code.

Create a new file called helloworld4.php so that it looks like the following code.

<?php
// PHP echoing "Hello World in HTML"
// Using functions
// helloworld4.php
function htmlheader ($t)
{
  echo "<html>\n";
  echo " <head>\n";
  echo "  <title>" . $t . "</title>\n";
  echo " </head>\n";
  echo " <body>\n";
}
function htmlfooter ()
{
  echo " </body>\n";
  echo "</html>\n";
}

$title = "Hello Using Functions";
htmlheader($title);
echo "  <p>Hello, World!</p>\n";
htmlfooter();
?>

In your favorite web browser, type
```
http://localhost/~YOURID/test_php/helloworld4.php
```
where YOURID is the user ID you have on the system.

Notes

The function keyword is used to introduce the definition of a function.
Arguments for the function are listed inside parens after the function name.
A function is called by simply using its name. Parens are required in the call even if no arguments are being passed.