WordPress/wp-admin/edit-page-form.php

<?php
/**
 * Edit page form for inclusion in the administration panels.
 *
 * @package WordPress
 * @subpackage Administration
 */

// don't load directly
if ( !defined('ABSPATH') )
	die('-1');

/**
 * Post ID global.
 * @name $post_ID
 * @var int
 */
if ( ! isset( $post_ID ) )
	$post_ID = 0;
if ( ! isset( $temp_ID ) )
	$temp_ID = 0;

$message = false;
if ( isset($_GET['message']) ) {
	$_GET['message'] = absint( $_GET['message'] );

	switch ( $_GET['message'] ) {
		case 1:
			$message = sprintf( __('Page updated. <a target="_blank" href="%s">View page</a>'), get_permalink($post_ID) );
			break;
		case 2:
			$message = __('Custom field updated.');
			break;
		case 3:
			$message = __('Custom field deleted.');
			break;
		case 4:
			$message = sprintf( __('Page published. <a target="_blank" href="%s">View page</a>'), get_permalink($post_ID) );
			break;
		case 5:
			if ( isset($_GET['revision']) )
				$message = sprintf( __('Page restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) );
			break;
		case 6:
			$message = sprintf( __('Page submitted. <a target="_blank" href="%s">Preview page</a>'), add_query_arg( 'preview', 'true', get_permalink($post_ID) ) );
			break;
		case 7:
			// translators: Publish box date formt, see http://php.net/date - Same as in meta-boxes.php
			$message = sprintf( __('Page scheduled for: <b>%1$s</b>. <a target="_blank" href="%2$s">Preview page</a>'), date_i18n( __( 'M j, Y @ G:i' ), strtotime( $post->post_date ) ), get_permalink($post_ID) );
			break;
		case 8:
			$message = sprintf( __('Page draft updated. <a target="_blank" href="%s">Preview page</a>'), add_query_arg( 'preview', 'true', get_permalink($post_ID) ) );
			break;
	}
}

$notice = false;
if ( 0 == $post_ID) {
	$form_action = 'post';
	$nonce_action = 'add-page';
	$temp_ID = -1 * time(); // don't change this formula without looking at wp_write_post()
	$form_extra = "<input type='hidden' id='post_ID' name='temp_ID' value='$temp_ID' />";
} else {
	$post_ID = (int) $post_ID;
	$form_action = 'editpost';
	$nonce_action = 'update-page_' . $post_ID;
	$form_extra = "<input type='hidden' id='post_ID' name='post_ID' value='$post_ID' />";
	$autosave = wp_get_post_autosave( $post_ID );
	if ( $autosave && mysql2date( 'U', $autosave->post_modified_gmt, false ) > mysql2date( 'U', $post->post_modified_gmt, false ) )
		$notice = sprintf( __( 'There is an autosave of this page that is more recent than the version below.  <a href="%s">View the autosave</a>.' ), get_edit_post_link( $autosave->ID ) );
}

$temp_ID = (int) $temp_ID;
$user_ID = (int) $user_ID;

require_once('includes/meta-boxes.php');

add_meta_box('submitdiv', __('Publish'), 'post_submit_meta_box', 'page', 'side', 'core');
add_meta_box('pageparentdiv', __('Attributes'), 'page_attributes_meta_box', 'page', 'side', 'core');
add_meta_box('postcustom', __('Custom Fields'), 'post_custom_meta_box', 'page', 'normal', 'core');
add_meta_box('commentstatusdiv', __('Discussion'), 'post_comment_status_meta_box', 'page', 'normal', 'core');
add_meta_box('slugdiv', __('Page Slug'), 'post_slug_meta_box', 'page', 'normal', 'core');

$authors = get_editable_user_ids( $current_user->id, true, 'page' ); // TODO: ROLE SYSTEM
if ( $post->post_author && !in_array($post->post_author, $authors) )
	$authors[] = $post->post_author;
if ( $authors && count( $authors ) > 1 )
	add_meta_box('pageauthordiv', __('Page Author'), 'post_author_meta_box', 'page', 'normal', 'core');

if ( 0 < $post_ID && wp_get_post_revisions( $post_ID ) )
	add_meta_box('revisionsdiv', __('Page Revisions'), 'post_revisions_meta_box', 'page', 'normal', 'core');

do_action('do_meta_boxes', 'page', 'normal', $post);
do_action('do_meta_boxes', 'page', 'advanced', $post);
do_action('do_meta_boxes', 'page', 'side', $post);

require_once('admin-header.php');
?>

<div class="wrap">
<?php screen_icon(); ?>
<h2><?php echo esc_html( $title ); ?></h2>

<form name="post" action="page.php" method="post" id="post">
<?php if ( $notice ) : ?>
<div id="notice" class="error"><p><?php echo $notice ?></p></div>
<?php endif; ?>
<?php if ( $message ) : ?>
<div id="message" class="updated fade"><p><?php echo $message; ?></p></div>
<?php endif; ?>

<?php
wp_nonce_field($nonce_action);

if (isset($mode) && 'bookmarklet' == $mode)
	echo '<input type="hidden" name="mode" value="bookmarklet" />';
?>
<input type="hidden" id="user-id" name="user_ID" value="<?php echo $user_ID ?>" />
<input type="hidden" id="hiddenaction" name="action" value='<?php echo esc_attr($form_action) ?>' />
<input type="hidden" id="originalaction" name="originalaction" value="<?php echo esc_attr($form_action) ?>" />
<input type="hidden" id="post_author" name="post_author" value="<?php echo esc_attr( $post->post_author ); ?>" />
<?php echo $form_extra ?>
<input type="hidden" id="post_type" name="post_type" value="<?php echo esc_attr($post->post_type) ?>" />
<input type="hidden" id="original_post_status" name="original_post_status" value="<?php echo esc_attr($post->post_status) ?>" />
<input name="referredby" type="hidden" id="referredby" value="<?php echo esc_url(stripslashes(wp_get_referer())); ?>" />
<?php if ( 'draft' != $post->post_status ) wp_original_referer_field(true, 'previous'); ?>

<div id="poststuff" class="metabox-holder<?php echo 2 == $screen_layout_columns ? ' has-right-sidebar' : ''; ?>">

<div id="side-info-column" class="inner-sidebar">
<?php
do_action('submitpage_box');
$side_meta_boxes = do_meta_boxes('page', 'side', $post); ?>
</div>

<div id="post-body">
<div id="post-body-content">
<div id="titlediv">
<div id="titlewrap">
	<label class="screen-reader-text" for="title"><?php _e('Title') ?></label>
	<input type="text" name="post_title" size="30" tabindex="1" value="<?php echo esc_attr( htmlspecialchars( $post->post_title ) ); ?>" id="title" autocomplete="off" />
</div>
<div class="inside">
<?php $sample_permalink_html = get_sample_permalink_html($post->ID); ?>
	<div id="edit-slug-box">
<?php if ( ! empty($post->ID) && ! empty($sample_permalink_html) ) :
	echo $sample_permalink_html;
endif; ?>
	</div>
</div>
</div>

<div id="<?php echo user_can_richedit() ? 'postdivrich' : 'postdiv'; ?>" class="postarea">

<?php the_editor($post->post_content); ?>
<table id="post-status-info" cellspacing="0"><tbody><tr>
	<td id="wp-word-count"></td>
	<td class="autosave-info">
	<span id="autosave">&nbsp;</span>

<?php
	if ($post_ID) {
		if ( $last_id = get_post_meta($post_ID, '_edit_last', true) ) {
			$last_user = get_userdata($last_id);
			printf(__('Last edited by %1$s on %2$s at %3$s'), esc_html( $last_user->display_name ), mysql2date(get_option('date_format'), $post->post_modified), mysql2date(get_option('time_format'), $post->post_modified));
		} else {
			printf(__('Last edited on %1$s at %2$s'), mysql2date(get_option('date_format'), $post->post_modified), mysql2date(get_option('time_format'), $post->post_modified));
		}
	}
?>
	</td>
</tr></tbody></table>

<?php
wp_nonce_field( 'autosave', 'autosavenonce', false );
wp_nonce_field( 'closedpostboxes', 'closedpostboxesnonce', false );
wp_nonce_field( 'getpermalink', 'getpermalinknonce', false );
wp_nonce_field( 'samplepermalink', 'samplepermalinknonce', false );
wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false ); ?>
</div>

<?php
do_meta_boxes('page', 'normal', $post);
do_action('edit_page_form');
do_meta_boxes('page', 'advanced', $post);
?>

</div>
</div>
</div>

</form>
</div>

<script type="text/javascript">
try{document.post.title.focus();}catch(e){}
</script>