การเขียนโปรแกรมแบบ oop ครับ ควรจะทำอะไรก่อนจะเริ่มเขียน

<?php
/*
 *      Table.class.php
 *
 *      Copyright 2010 Narong <[email protected]>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */

/**
 * @author narong
 */
class Table
{
	/**
	 * HTML Table Tag Attributes
	 * @var string
	 */
	private $attributes;
	
	/**
	 * HTML Table Tag caption.
	 * @var string
	 */
	private $caption;
	
	/**
	 * Highlight table rows.
	 * @var array
	 */
	private $highlight = array();
	
	/**
	 * Table header array contain title and css.
	 * @var array
	 */
	private $header = array();
	
	/**
	 * Table data array
	 * @var array
	 */
	private $data = array();

	/**
	 * Constructor
	 * Initialization that the object may need before it is used.
	 *  
	 * @param $attributes
	 * @param $header
	 * @param $data
	 * @param $highlight
	 * @param $caption
	 * @return No value is returned.
	 */
	public function __construct($attributes, $header, $data, $highlight, $caption)
	{
		self::setTable($attributes, $header, $data, $highlight, $caption);
	}
	
	/**
	 * Set table
	 * 
	 * @param $attributes
	 * @param $header
	 * @param $data
	 * @param $highlight
	 * @param $caption
	 * @return No value is returned. 
	 */
	public function setTable($attributes, $header, $data, $highlight, $caption)
	{
		$this->attributes = $attributes;
		$this->header 	  = $header;
		$this->data	  	  = $data;
		$this->highlight  = $highlight;
		$this->caption	  = $caption;
	}

	/**
	 * Create table
	 *
	 * @return No value is returned.
	 */
	public function getTable()
	{
		$html  = '<table ' . $this->attributes . '>';
		$html .= '<caption>' . $this->caption . '</caption>';
		$html .= '<thead>' . self::setHeader() . '</thead>';		
		$html .= '<tbody>' . self::setData() . '</tbody>';
		$html .= '</table>';
		
		return $html;
	}

	/**
	 * Set table header
	 * 
	 * @return HTML Table header.
	 */
	private function setHeader()
	{
		$html = '<tr>';
		if (!empty($this->header))
			foreach ($this->header['title'] as $key=>$value)
				$html .= '<th ' . $this->header['css'][$key] . '>' . $value . '</th>';
		else
			$html .= '<th class="txt-err">Please set header variable</th>';
		
		$html .= '</tr>';
			
		return $html;
	}
	
	/**
	 * Set table data
	 * 
	 * @return HTML Table data
	 */
	private function setData()
	{
		$html = '';
		if ($this->data) {
			foreach ($this->data as $key=>$rows) {
				$highlight = ($key%2 == 1) ?  $this->highlight[0] : $this->highlight[1];
				$html .= '<tr ' . $highlight . '>';
				
				foreach ($rows as $value)
					$html .= '<td>' . $value . '</td>';
					
				$html .= '</tr>';
			}
		} else {
			$html .= '<span class="txt-err">No data</span>';
		}
		
		return $html;
	}
}

@CHARSET "UTF-8";
body {
	font-family: "Trebuchet MS", Tahoma, Verdana, Arial, Helvetica, sans-serif;
	font-size: 11px; 
	color: #4f6b72;
	background: #E6EAE9;
}

#container {
	margin-left: auto;
	margin-right: auto;
	width: 600px;
}

#mytable {
	width: 600px;
	padding: 0;
	margin: 0;
}

#mytable caption {
	font-style: italic;
	font-size: 14px;
	padding: 0 0 5px 0;
	width: 600px;	 
	text-align: right;
}

#mytable thead th {
	color: #4f6b72;
	border:1px solid #C1DAD7;
	border-left: none;
	letter-spacing: 2px;
	text-transform: uppercase;
	text-align: center;
	padding: 6px 6px 6px 12px;
	background: #CAE8EA url(images/bg_header.jpg) no-repeat;
}

#mytable thead th:first-child {
	border-left: 1px solid #C1DAD7;
}

#mytable tbody tr:hover { 
	background-color:#FFFECD;
}

#mytable tbody td {
	border-right: 1px solid #C1DAD7;
	border-bottom: 1px solid #C1DAD7;
	padding: 6px 6px 6px 12px;
	color: #4f6b72;
}
#mytable tbody  td:first-child {
	border-left: 1px solid #C1DAD7;
}

.odd {
	background: #F5FAFA;
	color: #797268;
}

.even {
	background: #FFF;
	color: #797268;
}

.header-id {
	width: 30px;
}
.header-name {
	width: 100px;
}
.header-surname {
	width: 100px;
}
.header-email {
	width: 90px;
}

<?php
/*
 *      index.php
 *
 *      Copyright 2010 narong <[email protected]>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */
 
require_once dirname(__FILE__) . '/classes/Table.class.php';

echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
<title>บัญชีรายชื่อสายทางที่น้ำท่วมขัง</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta name="generator" content="Geany 0.19.1" />
<link href="css/default.css" rel="stylesheet" type="text/css" />
</head>

<body>';
$attributes = 'id="mytable" cellspacing="0"';
$header['title'] = array(	'ID.', 'NAME', 'SURNAME', 'EMAIL');
$header['css'] = array(
	'class="header-id"', 'class="header-name"',
	'class="header-surname"', 'class="header-email"'
);
$highlight  = array('class="odd"', 'class="even"');
$caption    = 'Test table';

$data = array(
	array('1', 'Narong', 'Rammanee', '[email protected]'),
	array('2', 'Narong', 'Rammanee', '[email protected]'),
	array('3', 'Narong', 'Rammanee', '[email protected]'),
	array('4', 'Narong', 'Rammanee', '[email protected]'),
	array('5', 'Narong', 'Rammanee', '[email protected]')
);

$table = new Table($attributes, $header, $data, $highlight, $caption);

echo $table->getTable();

echo '</body>
</html>';