Wordpress在一页上显示所有页面

I need to display all the pages on the one page.

At the moment I am using this to bring in each page:

<?php 
$page_id = 5; //id example
$page_data = get_page( $page_id ); 
$content = apply_filters('the_content', $page_data->post_content); 
$title = $page_data->post_title; 
echo $content; 
?> 

But if a new page is created it wont display it as wont have this code and its ID in place..

Is there a way to bring all the pages in automatically?

Any help will be appreciated, thanks

You can get all the pages of your blog by using get_pages();, do this in a loop like so:

$pages = get_pages(); 
foreach ($pages as $page_data) {
    $content = apply_filters('the_content', $page_data->post_content); 
    $title = $page_data->post_title; 
    echo $content; 
}

Also, if you are using the Twenty Ten theme (I don't know how will it work in others) you can easily get all the pages formatted:

echo "<h1 class=\"entry-title\">".$title."</h1>"
    ."<div class=\"entry-content\">".$content."</div>";

Well you can get the contents of each page by this code as well.

$content = apply_filters( 'the_content', $content );

Still there is huge problem if you are using custom templates for different pages you can get the content but not the template files on your one page

The accepted answer's returned array doesn't contain "post customs" (which I needed in my case). And also you may need to retrieve pages with specific attributes. Use args for more customized results:

<?php $args = array(
    'sort_order' => 'asc',
    'sort_column' => 'post_title',
    'hierarchical' => 1,
    'exclude' => '',
    'include' => '',
    'meta_key' => '',
    'meta_value' => '',
    'authors' => '',
    'child_of' => 0,
    'parent' => -1,
    'exclude_tree' => '',
    'number' => '',
    'offset' => 0,
    'post_type' => 'page',
    'post_status' => 'publish'
); 
$pages = get_pages($args); 
?>

And use them like this:

<?php
    foreach ($pages as $page) {
    $title = $page->post_title; 
    echo $title. "<br />";
} ?>

Read more here