Introduction to PHP.

Output.

Any output of a PHP script becomes part of the document the PHP preprocessor is writing.

All output must be in the form of HTML which may include embedded client-side scripts

There are three forms of producing output in a PHP script

echo, print, and printf

echo
- Can be called without parenthesis around several parameters
```
echo "A rose by any other name <br />", "Is a rose <br />";
        
```
- If parenthesis are used, only a single parameter is allowed
- echo does not return a value

print

Can never be called with more than one parameter

It returns a value: 1 if succeeded; 0 if failed

The following example displays the day of the week using date function:

l requests the day of the week

F requests the month

j requests the day of the month

S gets the correct ordinal suffix

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 strict//EN"
"http://www.w3.org/TR/xhtml1/dtd/xhtml1-strict.dtd">


<!-- today.php
	A trivial example to illustrate a php document
	-->

<html>
<head>
<title>
today.php</title>
</head>
<body>

<p>
<?php
	print "<b>Welcome to my home document <br /><br />";
	print "Today is: </b>";
	print date("l, F jS");
	print "<br /><br />";
?>
</p>
</body>
</html>

A trivial example to illustrate a PHP document

printf
- Used to control the format of the displayed data
- For more details look at any book on C