"Hello <?PHP World ?>"
Let's create a Hello World code in PHP. Gosh I have seen "Hello World" so many times I at times think it's my name. Let's be different. Let's say "Hello PHP World"
<html><head><title>Hello PHP World</title><head>
<body bgcolor="black" text="white">
<?php
print("<h3>Hello PHP World</h3>");
?>
</body></html>
There are a few things worth noticing:
Ambitious Alternative
You must be feeling ambitious by now. I know I am. So let's make our program do a little more than just "Hello World"-ing the PHP world. Let's say "Hello PHP World", output a "<HR>" and a line saying "PHP seems like fun" in red and a size of 4. In "plain HTML" this would be printed thus:
<h2>Hello PHP World
<hr>
<p><font size="4" color="red">PHP seems like fun</font>
In PHP there is a right solution and a wrong solution. Here is the wrong solution:
<html><head><title>Hello PHP World</title></head>
<body>
<?php
print("<h2>Hello PHP World");
echo("<hr>");
print("<p><font size="3" color="red">PHP seems like fun</font></p>");
?>
</body></html>
What! This is wrong!? Perl and Java(Script) programmers must be smiling by now. The other like you (oops! Sorry) are just buffled. Let's take a refresher.
In point number e) of the points (observations) made earlier we said the text being output should be put WITHIN double quotes. Look at line 6 in our code. How many double quotes do you see? Well. The PHP preprocessor would be as confused as you if you gave it the above code to munch :-O.
How about that echo thingie on line 5. Well. That's fine. There are more than one ways of killing a rat: dip it in hot water, chock it with a blanket, smash it with a slipper, shoot with a canon...
In the same way, there are several ways of outputing text, print() just happens to be one of them and echo() is one of the other sisters.
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