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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Jesus M. Castagnetto <jmcastagnetto@php.net> |
// +----------------------------------------------------------------------+
//
// $Id$
//
/**
* Utility class that defines a chemical element object
*
* @author Jesus M. Castagnetto <jmcastagnetto@php.net>
* @version 1.0
* @access public
* @package Science_Chemistry
*/
class Science_Chemistry_Element {
/**
* Element's symbol, one or two characters, case sensitive
*
* @var string
* @access public
*/
var $symbol;
/**
* Element's name
*
* @var string
* @access public
*/
var $name;
/**
* Element's atomic number
*
* @var integer
* @access public
*/
var $number;
/**
* Element's atomic weight in a.m.u (atomic mass units)
*
* @var float
* @access public
*/
var $weight;
/**
* Element's melting point, with comments
*
* @var string
* @access public
*/
var $melting_point;
/**
* Element's boiling point, with comments
*
* @var string
* @access public
*/
var $boiling_point;
/**
* Element's family
*
* @var string
* @access public
*/
var $family;
/**
* Constructor for the class
*
* @param string $sym element symbol
* @param string $name element name
* @param integer $num atomic number
* @param float $wgt atomic weight
* @param string $mp melting point (with comments)
* @param string $bp boiling point (with comments)
* @param string $fam family
* @return object Science_Chemistry_Element
* @access public
*/
function Science_Chemistry_Element ($sym, $name, $num, $wgt, $mp, $bp, $fam) {
$this->symbol = $sym;
$this->name = $name;
$this->number = $num;
$this->weight = $wgt;
$this->melting_point = $mp;
$this->boiling_point = $b;
$this->family = $fam;
}
/**
* Checks if an object is a Science_Chemistry_Element instance
*
* @param object Science_Chemistry_Element $obj
* @return boolean
* @access public
*/
function isElement($obj) {
return (is_object($obj) &&
(strtolower(get_class($obj)) == "Science_Chemistry_Element" ||
is_subclass_of($obj, "Science_Chemistry_Element"))
);
}
} // end of Science_Chemistry_Element
// vim: expandtab: ts=4: sw=4
?>
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