»  PDF Version 

This guide is based on the PHP4 Manual, available at: www.php.net/docs.php

General Rules

• The only classifier in PHP4 is Class
• PHP4 Class can not participate in an Association.
• There is no Exception in PHP4.
• There are two files generated for each Class generation process:
  1. '.inc' file that contains class declaration
  2. '.php' file which includes related '.inc' on its first line

Tagged values

The following tagged value keys are supported for PHP4 Class:

• '<<<' for Heredoc string
• 'initval' for an initial value of an operation parameter
• '&' for operation parameter passed by reference
• '&' for a function that returns a reference

PHP4 Class Modelling Rules

• Use standard UML 'Class'
• Only supports single inheritance

Class Signature

• There are no visibilities for Class Signature
• There are no modifiers for Class Signature

Class Attributes

• There are no visibilities for Class Attributes.
• Tagged values supported:

  1. Heredoc

     Tagged value = '<<<', with value = 'true'
     Will return anything typed in the initial value with Heredoc string type:

     Example:
     $str = <<<EOD
     Example of string
     spanning multiple lines
     using heredoc syntax.
     EOD;

Class Operations

• There are no visibilities for Class Operations.
• Tagged values supported:

  1. Parameter initial value
     Tagged value= 'initval', with value = (specified parameter initial value).

     Example:
     

     class ConstructorCart extends Cart {
        function ConstructorCart($item = "10", $num = 1)  {
           $this->add_item ($item, $num);
        }
     }

  2. Parameter passed by reference
     Tagged value='&' with value='true' in the parameter signature.

     Example:
     

     <?php
     function foo (&$var) {
        $var++;
     }
     
     $a=5;
     foo ($a);
     // $a is 6 here
     ?>

  3. Function returns a reference
     Tagged value='&' with value='true' in the operation signature.

     Example:
     

     <?php
     function &returns_reference() {
        return $someref;
     }
     
     $newref =& returns_reference();
     ?>