WordPress/wp-admin/page.php

<?php
require_once('admin.php');

$parent_file = 'edit.php';
$submenu_file = 'edit-pages.php';

wp_reset_vars(array('action'));

function redirect_page($page_ID) {
	$referredby = '';
	if ( !empty($_POST['referredby']) ) {
		$referredby = preg_replace('|https?://[^/]+|i', '', $_POST['referredby']);
		$referredby = remove_query_arg('_wp_original_http_referer', $referredby);
	}
	$referer = preg_replace('|https?://[^/]+|i', '', wp_get_referer());

	if ( 'post' == $_POST['originalaction'] && !empty($_POST['mode']) && 'bookmarklet' == $_POST['mode'] ) {
		$location = $_POST['referredby'];
	} elseif ( 'post' == $_POST['originalaction'] && !empty($_POST['mode']) && 'sidebar' == $_POST['mode'] ) {
		$location = 'sidebar.php?a=b';
	} elseif ( isset($_POST['save']) && ( empty($referredby) || $referredby == $referer || 'redo' != $referredby ) ) {
		if ( $_POST['_wp_original_http_referer'] && strpos( $_POST['_wp_original_http_referer'], '/wp-admin/page.php') === false && strpos( $_POST['_wp_original_http_referer'], '/wp-admin/page-new.php') === false )
			$location = add_query_arg( '_wp_original_http_referer', urlencode( stripslashes( $_POST['_wp_original_http_referer'] ) ), "page.php?action=edit&post=$page_ID&message=1" );
		else
			$location = "page.php?action=edit&post=$page_ID&message=4";
	} elseif ($_POST['addmeta']) {
		$location = add_query_arg( 'message', 2, wp_get_referer() );
		$location = explode('#', $location);
		$location = $location[0] . '#postcustom';
	} elseif ($_POST['deletemeta']) {
		$location = add_query_arg( 'message', 3, wp_get_referer() );
		$location = explode('#', $location);
		$location = $location[0] . '#postcustom';
	} elseif (!empty($referredby) && $referredby != $referer) {
		$location = $_POST['referredby'];
		$location = remove_query_arg('_wp_original_http_referer', $location);
		if ( $_POST['referredby'] == 'redo' )
			$location = get_permalink( $page_ID );
		elseif ( false !== strpos($location, 'edit-pages.php') )
			$location = add_query_arg('posted', $page_ID, $location);
		elseif ( false !== strpos($location, 'wp-admin') )
			$location = "page-new.php?posted=$page_ID";
	} elseif ( isset($_POST['publish']) ) {
		$location = "page-new.php?posted=$page_ID";
	} elseif ($action == 'editattachment') {
		$location = 'attachments.php';
	} else {
		$location = "page.php?action=edit&post=$page_ID&message=4";
	}

	wp_redirect($location);
}

if (isset($_POST['deletepost'])) {
$action = "delete";
}

switch($action) {
case 'post':
	check_admin_referer('add-page');
	$page_ID = write_post();

	redirect_page($page_ID);

	exit();
	break;

case 'edit':
	$title = __('Edit');
	$editing = true;
	$page_ID = $post_ID = $p = (int) $_GET['post'];
	$post = get_post_to_edit($page_ID);

	if ( empty($post->ID) ) wp_die( __("You attempted to edit a page that doesn't exist. Perhaps it was deleted?") );

	if ( 'page' != $post->post_type ) {
		wp_redirect( get_edit_post_link( $post_ID, 'url' ) );
		exit();
	}

	wp_enqueue_script('page');
	if ( user_can_richedit() )
		wp_enqueue_script('editor');
	wp_enqueue_script('thickbox');
	wp_enqueue_script('media-upload');
	wp_enqueue_script('word-count');

	if ( current_user_can('edit_page', $page_ID) ) {
		if ( $last = wp_check_post_lock( $post->ID ) ) {
			$last_user = get_userdata( $last );
			$last_user_name = $last_user ? $last_user->display_name : __('Somebody');
			$message = sprintf( __( 'Warning: %s is currently editing this page' ), wp_specialchars( $last_user_name ) );
			$message = str_replace( "'", "\'", "<div class='error'><p>$message</p></div>" );
			add_action('admin_notices', create_function( '', "echo '$message';" ) );
		} else {
			wp_set_post_lock( $post->ID );
			wp_enqueue_script('autosave');
		}
	}

	require_once('admin-header.php');

	if ( !current_user_can('edit_page', $page_ID) )
		die ( __('You are not allowed to edit this page.') );

	include('edit-page-form.php');
	break;

case 'editattachment':
	$page_id = $post_ID = (int) $_POST['post_ID'];
	check_admin_referer('update-attachment_' . $page_id);

	// Don't let these be changed
	unset($_POST['guid']);
	$_POST['post_type'] = 'attachment';

	// Update the thumbnail filename
	$newmeta = wp_get_attachment_metadata( $page_id, true );
	$newmeta['thumb'] = $_POST['thumb'];

	wp_update_attachment_metadata( $newmeta );

case 'editpost':
	$page_ID = (int) $_POST['post_ID'];
	check_admin_referer('update-page_' . $page_ID);

	$page_ID = edit_post();

	redirect_page($page_ID);

	exit();
	break;

case 'delete':
	$page_id = (isset($_GET['post']))  ? intval($_GET['post']) : intval($_POST['post_ID']);
	check_admin_referer('delete-page_' .  $page_id);

	$page = & get_post($page_id);

	if ( !current_user_can('delete_page', $page_id) )
		wp_die( __('You are not allowed to delete this page.') );

	if ( $page->post_type == 'attachment' ) {
		if ( ! wp_delete_attachment($page_id) )
			wp_die( __('Error in deleting...') );
	} else {
		if ( !wp_delete_post($page_id) )
			wp_die( __('Error in deleting...') );
	}

	$sendback = wp_get_referer();
	if (strpos($sendback, 'page.php') !== false) $sendback = get_option('siteurl') .'/wp-admin/page.php';
	elseif (strpos($sendback, 'attachments.php') !== false) $sendback = get_option('siteurl') .'/wp-admin/attachments.php';
	$sendback = preg_replace('|[^a-z0-9-~+_.?#=&;,/:]|i', '', $sendback);
	wp_redirect($sendback);
	exit();
	break;

default:
	wp_redirect('edit-pages.php');
	exit();
	break;
} // end switch
include('admin-footer.php');
?>