Get list of cases in switch statement

$pages = array('about'=> 'About Us', 'services' => 'Services');

if (array_key_exists($page, $pages)) {
   $title_name = $pages[$page];
   $page_content = "includes/$page.php";
   include('inner.php');
}

For your footer you can just iterate over the list of pages. To add a new page, just add it to the array and create the corresponding file.

But to answer your question: No, you can't analyze code-statements during runtime.

Nope, it's not possible using switch - but you could store those informations in an array:

$page_list = array(
    'about' => array(
        'title' => 'About Us',
        'content' => 'includes/about-us.php',
    ),
    'services' => array(
        'title' => 'Services',
        'content' => 'includes/services.php',
    ),
);

if(isset($page_list[$page])) {
    $page_info = $page_list[$page];

    $title_name = $page_info['title'];
    $page_content = $page_info['content'];

    include("inner.php");
} else {
    // 404 - file not found
}

// create links
foreach($page_list as $link_name => $page_ent) {
    echo "<a href=\"/{$link_name}/\">{$page_ent['title']}</a><br />"
}

// output
// <a href="/about/">About Us</a><br />
// <a href="/services/">Services</a><br />