php templates

[desithugg]

Umm, I'm trying to learn how to make templates, and am using a lil code I found on the net to try and see  how it works but I have an error

the html template

//tmpl.txt
Hello My name Is %name. I am %age %sex From %country.
My array Element 1 is %tmpl_arrr[0]
My array Element 2 is %tmpl_arrr[1]
My array Element 3 is %tmpl_arrr[2]
My array Element 4 is %tmpl_arrr[3]
My array Element 5 is %tmpl_arrr[4]

The php code

<?php
//tmpl.php
//Using template Class
$tmpl = new template("tmpl.txt");//Specify The Template File
$tmpl->set("%name", "Neel");//"%var_name", "Value"
$tmpl->set("age", 18);//It Will think that You forgot to enter The % sign and do the Same Job Of %age
$tmpl->set("%sex", "male");
$tmpl->set("country", "India");
echo $tmpl->count("%tmpl_arrr");//Same as count()
echo "\n";
$tmpl->set("%tmpl_arrr[0]", "Hello");//Set The Value Indivisually
for($i=1;$i<$tmpl->count("%tmpl_arrr");$i++)
    {
        $tmpl->set("%tmpl_arrr[$i]", "My Value $i");//Set the Value in A Loop
    }
echo $tmpl->done();//returns The Changed Contents Of the File as String
?> 

and here's the error I'm getting

Fatal error: Cannot instantiate non-existent class: template in /home/pcaworld/public_html/ds/tmpl.php on line 3

[trq]

There is no built in template engine in php, therefore you need to define the template class. You can either do this yourself (can be quite complex) or use one of the existing template engines like smarty.