Basic Php Constructs For Oop/defining Classes

[+skyler_sdf]

The general form for defining a new class in PHP is as follows:

class myclass extends myparent{

var $var1;

var $var2="constant string";

function myfunc($arg1, $arg2){

[...]

}

[...]

}

The special form class, followed by the name of the class that you want to define. An optional extensional clause, consisting of the word extends and then the name of the class that should be inherited from. A set of braces enclosing any number of the variable declarations and function definitions. Variable declarations start with the special form var, which is followed by a conventional $ variable name; they may also have an initial assignment to a constant value. Function definitions look much like standalone PHP functions but are local to the class. Example:

<?php

class textboxsimple{

var $body_text="my text";

function_display()

{

print("<table border=1><tr><td>$this->body_text");

print("</td></tr></table>");

}

}

?>

This is an extremely simple class definition. It has no parent(and, therefore, no extends clause). It has a single memebervariable(the variable $body_text), and a single member function(the function display()).The display function simply prints out the text variable, wrapped up in an HTML table definition.