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HomeBackend DevelopmentPHP TutorialXnova (ogame) source code interpretation for PHP web game learning (2)_PHP tutorial

三、 安装(install/index.php)

这个文件是安装页面,一开始就可以看到定义了两个常量:

define('INSIDE' , true);
define('INSTALL' , true); 


因为这两个常量在接下来的代码中总是用到,所以在这里先说明下。INSIDE是用来防止攻击的;INSTALL是用来记录现在是否处于安装游戏的进程中。

接下来Include两个文件:extension.inc和common,这两个都是正宗的php文件。首先extension.inc里面加入了防止攻击的代码,并且把php文件的扩展名隐藏起来,就是这句$phpEx = “php”。那么'common.'.$phpEx其实就是common.php了。

includeLang('install/install'); 


这句是load语言文件,includeLang()函数声明在includes/unlocalised.php文件中,这个文件中还有很多的小函数。

function includeLang ($filename, $ext = '.mo') {
 global $xnova_root_path, $lang, $user;
 if ($user['lang'] != '') {
 $SelLanguage = $user['lang'];
 } else {
 $SelLanguage = DEFAULT_LANG;
 }
 include ($xnova_root_path . "language/". $SelLanguage ."/". $filename.$ext);
} 

函数的功能是个根据用户的所用的语种 include 相应的代码,XnovaTC3版本里面是支持每个用户使用不同的语言的,我使用的版本无此功能。

继续往下,取得当前要显示的页面内容,就是到了安装步骤几了;然后进入一个大的switch。在这之前有一个这样的语句:

$MainTPL = gettemplate('install/ins_body'); 

Gettemplate()函数同样声明在includes/unlocalised.php文件中,

function gettemplate ($templatename) {
 global $xnova_root_path;
 $filename = $xnova_root_path . TEMPLATE_DIR . TEMPLATE_NAME . '/' . $templatename . ".tpl";
 return ReadFromFile($filename);
} 

函数的功能是取得一个指定文件的内容,这个指定的文件是这样构成的:

$ugamela_root_path . TEMPLATE_DIR . TEMPLATE_NAME . '/' . $templatename . ".tpl"; 

TEMPLATE_DIR的值是'templates/',TEMPLATE_NAME的值是'OpenGame',那么前面的 gettemplate

('install/ins_body')就是取得templates/OpenGame/install/ins_body.tpl文件中的内容。这样的函数还有几个,大家都要记住,后面会经常用到。

case ‘intro':

一看就应该知道,是说明介绍的页面,不过里面有个我们首次见到的函数parsetemplate(),声明在includes/unlocalised.php文件中,

function parsetemplate ($template, $array) {
return preg_replace('#\{([a-z0-9\-_]*?)\}#Ssie', '( ( isset($array[\'\1\']) ) ? $array[\'\1\'] : \'\' );', $template);
} 

函数的功能是利用正则表达式,对$template中的特定字符串(就是由 {} 括起来的内容),用$array的值进行替换,来实现多语言功能。

case ‘ins':

这个分枝是具体安装过程,分成4个步骤页面,由$page变量控制显示哪一个页面。

1. 当$page值为1时,先进行一些错误判断;如果没有错误,就读取 templates/install/ins_form.tpl模板,parse出并构成有服务器地址、数据库名、表名前缀、用户名和密码的页面。安装者输入数据后,点击install进入下一步的流程。

2. 当$page值为2时,取得第一步输入的数据,并尝试连接数据库;如果连接不上数据库则提示错误;连上数据库则继续后续的过程,包括:在config.php文件中写入数据库连接信息;根据includes/databaseinfos.php文件内容创建表结构。

3. 当$page值为3时,判断上一步是否发生错误,没有发生则显示一些信息并parse出创建管理员帐号的表单,进入下一个流程。

4. 当$page值为4时,取得上一步输入的数据,有帐号、密码、email等;一些判断之后创建这个管理员帐号,创建的过程以后注册的时候再详细说明。

至此,安装主要过程就结束了,主要步骤就是这些,代码也不难理解。最后还有一个函数要讲解下,就是display(),声明在includes/function.php文件中,

function display ($page, $title = '', $topnav = true, $metatags = '', $AdminPage = false) {
global $link, $game_config, $debug, $user, $planetrow;
if (!$AdminPage) {
$DisplayPage = StdUserHeader ($title, $metatags);
} else {
$DisplayPage = AdminUserHeader ($title, $metatags);
}
if ($topnav) {
$DisplayPage .= ShowTopNavigationBar( $user, $planetrow );
}
$DisplayPage .= "<center>\n". $page ."\n</center>\n";
// Affichage du Debug si necessaire
if ($user['authlevel'] == 1 || $user['authlevel'] == 3) {
if ($game_config['debug'] == 1) $debug->echo_log();
}
$DisplayPage .= StdFooter();
if (isset($link)) {
@mysql_close($link);
}
echo $DisplayPage;
die();
} 

函数的功能是显示普通用户页眉和管理员页眉的区分,是否显示顶部的信息栏等,此函数中还调用了其他函数,如:StdUserHeader()、AdminUserHeader()、ShowTopNavigationBar()和 StdFooter()都不复杂,其实现都是前面介绍过的 parsetempalte()和gettemplate(),这里就不详细说明了。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/825518.htmlTechArticle三、 安装(install/index.php) 这个文件是安装页面,一开始就可以看到定义了两个常量: define('INSIDE' , true);define('INSTALL' , true); 因为这两个常...
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