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PHP and Classes Page 3

By Rod Kreisler
on July 30, 2000

Great, now what to we do with it? I’m glad you asked. We need to
create a few more functions within Style to actually accomplish
anything. The first thing I’d like to do is set up my page body so I
did this:


function Body() {

        PRINT "<BODY BGCOLOR="$this->bgcol" ".

"TEXT="$this->text" ".

"LINK="$this->link" VLINK="$this->vlink" ".

"ALINK="$this->alink"><FONT ".

"FACE="$this->face" SIZE=$this->size>n";



This sets up the page body for us. It also illustrates a new variable
“$this.” When used inside of a class function it lets the interpreter
know we are referring to a variable of THIS instance. In other words,
it’s assigned the value of the name of the instance in the calling line
(e.g. $this would be == $Basic when $Basic->Body() is the calling
statement.) Also, notice we are doing something here that’s much
simpler than is possible in regular functions. We’re referring to
variables that were not passed to the function. Remember, all functions
and variables of an instance are available to all functions of that
instance. To do this with regular functions you’d have to set up
several global arrays.
Try this in your php script (assuming you’ve included the Style class,
created the style objects above and sent the <HTML> and <HEAD></HEAD>

<?php $Basic->Body(); ?>

Now, we’re ready to print something out. We could do it the old
fashioned way, but I’m going to do something different… that’s right
another function:


function TextOut($message="&nbsp") {

        PRINT "<FONT FACE="$this->face" ".

"SIZE=$this->size COLOR="$this-> ".