php学习，一个简单的Calendar(2) 一个简单的活动页面

<span style="color: #008000"> * 数据库操作（数据库访问，认证等）</span>

<span style="color: #0000ff">class</span> DB_Connect

    <span style="color: #008000">/**</span>

<span style="color: #008000">     * Stores a database object</span>

<span style="color: #008000">     *</span>

<span style="color: #008000">     * @var object A database object</span>

<span style="color: #008000">     */</span>

    <span style="color: #0000ff">protected</span> $db;

    <span style="color: #008000">/**</span>

<span style="color: #008000">     * Checks for a DB object or creates one if one isn't found</span>

<span style="color: #008000">     *</span>

<span style="color: #008000">     * @param object $dbo A database object</span>

<span style="color: #008000">     */</span>

    <span style="color: #0000ff">protected</span> <span style="color: #0000ff">function</span> __construct($db = NULL)

    {

        <span style="color: #0000ff">if</span> (is_object($db)) {

            $this->db = $db;

        } <span style="color: #0000ff">else</span> {

            <span style="color: #008000">// Constants are defined in /sys/config/db-cred.inc.php</span>

            $dsn = <span style="color: #006080">"mysql:host="</span> . DB_HOST . <span style="color: #006080">";dbname="</span> . DB_NAME;

            try {

                $this->db = <span style="color: #0000ff">new</span> PDO($dsn, DB_USER, DB_PASS, <span style="color: #0000ff">array</span>(PDO::MYSQL_ATTR_INIT_COMMAND => <span style="color: #006080">'SET NAMES '</span> . DB_ENCODE));

            } catch (Exception $e) {

                <span style="color: #008000">// If the DB connection fails, output the error</span>

                <span style="color: #0000ff">die</span> ($e->getMessage());

            }

        }

    }

 <span style="color: #008000">/*</span>

<span style="color: #008000">* Create an empty array to store constants</span>

$C = <span style="color: #0000ff">array</span>();

<span style="color: #008000">* The database host URL</span>

$C[<span style="color: #006080">'DB_HOST'</span>] = <span style="color: #006080">'localhost'</span>;

<span style="color: #008000">* The database username</span>

$C[<span style="color: #006080">'DB_USER'</span>] = <span style="color: #006080">'root'</span>;

<span style="color: #008000">* The database password</span>

$C[<span style="color: #006080">'DB_PASS'</span>] = <span style="color: #006080">'root'</span>;

<span style="color: #008000">* The name of the database to work with</span>

$C[<span style="color: #006080">'DB_NAME'</span>] = <span style="color: #006080">'php-jquery_example'</span>;

$C[<span style="color: #006080">'DB_ENCODE'</span>] = <span style="color: #006080">'UTF8'</span>;

<span style="color: #008000"> * Created on 2016-6-19 by luhx</span>

session_start();

<span style="color: #008000">* Generate an anti-CSRF token if one doesn't exist</span>

<span style="color: #0000ff">if</span> (!<span style="color: #0000ff">isset</span>($_SESSION[<span style="color: #006080">'token'</span>])) {

    $_SESSION[<span style="color: #006080">'token'</span>] = sha1(uniqid(mt_rand(), TRUE));

<span style="color: #008000">* Include the necessary configuration info</span>

<span style="color: #0000ff">include_once</span> <span style="color: #006080">'../sys/config/db-cred.inc.php'</span>;

<span style="color: #008000">* Define constants for configuration info</span>

<span style="color: #0000ff">foreach</span> ($C <span style="color: #0000ff">as</span> $name => $val) {

    define($name, $val);

<span style="color: #008000">* Create a PDO object</span>

$dsn = <span style="color: #006080">"mysql:host="</span> . DB_HOST . <span style="color: #006080">";dbname="</span> . DB_NAME;

$dbo = <span style="color: #0000ff">new</span> PDO($dsn, DB_USER, DB_PASS);

<span style="color: #008000">* Define the auto-load function for classes</span>

<span style="color: #0000ff">function</span> __autoload($<span style="color: #0000ff">class</span>)

    $filename = <span style="color: #006080">"../sys/class/class."</span> . $<span style="color: #0000ff">class</span> . <span style="color: #006080">".inc.php"</span>;

    <span style="color: #0000ff">if</span> (file_exists($filename)) {

        <span style="color: #0000ff">include_once</span> $filename;

    }

}

<span style="color: #008000">* 包含必须的文件</span>

<span style="color: #0000ff">include_once</span> <span style="color: #006080">'../sys/core/init.inc.php'</span>;

<span style="color: #008000">* 载入日历</span>

$cal = <span style="color: #0000ff">new</span> Calendar($dbo, <span style="color: #006080">"2010-01-01 12:00:00"</span>);

<span style="color: #008000">/**</span>

<span style="color: #008000"> * 初始化标题和样式文件</span>

$page_title = <span style="color: #006080">"Events Calendar"</span>;

$css_files = <span style="color: #0000ff">array</span>(<span style="color: #006080">'style.css'</span>);

<span style="color: #0000ff">include_once</span> <span style="color: #006080">'assets/common/header.inc.php'</span>;