จะเลือกค่านี้ยังไงครับเกี่ยวกับ array get PHP ช่วยหน่อยครับ

$incontext['steps'] = array(
	0 => array(1, $txt['install_step_welcome'], 'Welcome', 0),
	1 => array(2, $txt['install_step_writable'], 'CheckFilesWritable', 10),
	2 => array(3, $txt['install_step_databaseset'], 'DatabaseSettings', 15),
	3 => array(4, $txt['install_step_forum'], 'ForumSettings', 40),
	4 => array(5, $txt['install_step_databasechange'], 'DatabasePopulation', 15),
	5 => array(6, $txt['install_step_admin'], 'AdminAccount', 20),
	6 => array(7, $txt['install_step_delete'], 'DeleteInstall', 0),
);

$incontext['current_step'] = isset($_GET['step']) ? (int) $_GET['step'] : 0;
$incontext['overall_percent'] = 0;

foreach ($incontext['steps'] as $num => $step)
{
	if ($num >= $incontext['current_step'])
	{
		$incontext['step_weight'] = $step[3];
		
		if (function_exists($step[2]) && $step[2]() === false)
			break;
		elseif (function_exists($step[2]))
			$incontext['current_step']++;
			
		$incontext['warning'] = '';
	}
	$incontext['overall_percent'] += $step[3];

}

	echo $step[2];
	echo $incontext['current_step'];
	echo $incontext['overall_percent'];