WordPress/wp-admin/includes/post.php

694 lines
22 KiB
PHP

<?php
/**
* _wp_translate_postdata() - Rename $_POST data from form names to DB post columns.
*
* Manipulates $_POST directly.
*
* @package WordPress
* @since 2.6
*
* @param bool $update Are we updating a pre-existing post?
* @return object|bool WP_Error on failure, true on success.
*/
function _wp_translate_postdata( $update = false ) {
if ( $update )
$_POST['ID'] = (int) $_POST['post_ID'];
$_POST['post_content'] = $_POST['content'];
$_POST['post_excerpt'] = $_POST['excerpt'];
$_POST['post_parent'] = isset($_POST['parent_id'])? $_POST['parent_id'] : '';
$_POST['to_ping'] = $_POST['trackback_url'];
if (!empty ( $_POST['post_author_override'] ) ) {
$_POST['post_author'] = (int) $_POST['post_author_override'];
} else {
if (!empty ( $_POST['post_author'] ) ) {
$_POST['post_author'] = (int) $_POST['post_author'];
} else {
$_POST['post_author'] = (int) $_POST['user_ID'];
}
}
if ( $_POST['post_author'] != $_POST['user_ID'] ) {
if ( 'page' == $_POST['post_type'] ) {
if ( !current_user_can( 'edit_others_pages' ) ) {
return new WP_Error( 'edit_others_pages', $update ?
__( 'You are not allowed to edit pages as this user.' ) :
__( 'You are not allowed to create pages as this user.' )
);
}
} else {
if ( !current_user_can( 'edit_others_posts' ) ) {
return new WP_Error( 'edit_others_posts', $update ?
__( 'You are not allowed to edit posts as this user.' ) :
__( 'You are not allowed to post as this user.' )
);
}
}
}
// What to do based on which button they pressed
if ( isset($_POST['saveasdraft']) && '' != $_POST['saveasdraft'] )
$_POST['post_status'] = 'draft';
if ( isset($_POST['saveasprivate']) && '' != $_POST['saveasprivate'] )
$_POST['post_status'] = 'private';
if ( isset($_POST['publish']) && ( '' != $_POST['publish'] ) && ( $_POST['post_status'] != 'private' ) )
$_POST['post_status'] = 'publish';
if ( isset($_POST['advanced']) && '' != $_POST['advanced'] )
$_POST['post_status'] = 'draft';
$previous_status = get_post_field('post_status', $_POST['ID']);
// Posts 'submitted for approval' present are submitted to $_POST the same as if they were being published.
// Change status from 'publish' to 'pending' if user lacks permissions to publish or to resave published posts.
if ( 'page' == $_POST['post_type'] ) {
if ( 'publish' == $_POST['post_status'] && !current_user_can( 'publish_pages' ) )
if ( $previous_status != 'publish' OR !current_user_can( 'edit_published_pages') )
$_POST['post_status'] = 'pending';
} else {
if ( 'publish' == $_POST['post_status'] && !current_user_can( 'publish_posts' ) ) :
// Stop attempts to publish new posts, but allow already published posts to be saved if appropriate.
if ( $previous_status != 'publish' OR !current_user_can( 'edit_published_posts') )
$_POST['post_status'] = 'pending';
endif;
}
if (!isset( $_POST['comment_status'] ))
$_POST['comment_status'] = 'closed';
if (!isset( $_POST['ping_status'] ))
$_POST['ping_status'] = 'closed';
foreach ( array('aa', 'mm', 'jj', 'hh', 'mn') as $timeunit ) {
if ( !empty( $_POST['hidden_' . $timeunit] ) && $_POST['hidden_' . $timeunit] != $_POST[$timeunit] ) {
$_POST['edit_date'] = '1';
break;
}
}
if ( !empty( $_POST['edit_date'] ) ) {
$aa = $_POST['aa'];
$mm = $_POST['mm'];
$jj = $_POST['jj'];
$hh = $_POST['hh'];
$mn = $_POST['mn'];
$ss = $_POST['ss'];
$aa = ($aa <= 0 ) ? date('Y') : $aa;
$mm = ($mm <= 0 ) ? date('n') : $mm;
$jj = ($jj > 31 ) ? 31 : $jj;
$jj = ($jj <= 0 ) ? date('j') : $jj;
$hh = ($hh > 23 ) ? $hh -24 : $hh;
$mn = ($mn > 59 ) ? $mn -60 : $mn;
$ss = ($ss > 59 ) ? $ss -60 : $ss;
$_POST['post_date'] = sprintf( "%04d-%02d-%02d %02d:%02d:%02d", $aa, $mm, $jj, $hh, $mn, $ss );
$_POST['post_date_gmt'] = get_gmt_from_date( $_POST['post_date'] );
}
return true;
}
// Update an existing post with values provided in $_POST.
function edit_post() {
$post_ID = (int) $_POST['post_ID'];
if ( 'page' == $_POST['post_type'] ) {
if ( !current_user_can( 'edit_page', $post_ID ) )
wp_die( __('You are not allowed to edit this page.' ));
} else {
if ( !current_user_can( 'edit_post', $post_ID ) )
wp_die( __('You are not allowed to edit this post.' ));
}
// Autosave shouldn't save too soon after a real save
if ( 'autosave' == $_POST['action'] ) {
$post =& get_post( $post_ID );
$now = time();
$then = strtotime($post->post_date_gmt . ' +0000');
$delta = AUTOSAVE_INTERVAL / 2;
if ( ($now - $then) < $delta )
return $post_ID;
}
$translated = _wp_translate_postdata( true );
if ( is_wp_error($translated) )
wp_die( $translated->get_error_message() );
// Meta Stuff
if ( isset($_POST['meta']) && $_POST['meta'] ) {
foreach ( $_POST['meta'] as $key => $value )
update_meta( $key, $value['key'], $value['value'] );
}
if ( isset($_POST['deletemeta']) && $_POST['deletemeta'] ) {
foreach ( $_POST['deletemeta'] as $key => $value )
delete_meta( $key );
}
add_meta( $post_ID );
wp_update_post( $_POST );
// Reunite any orphaned attachments with their parent
if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
$draft_ids = array();
if ( $draft_temp_id = (int) array_search( $post_ID, $draft_ids ) )
_relocate_children( $draft_temp_id, $post_ID );
// Now that we have an ID we can fix any attachment anchor hrefs
_fix_attachment_links( $post_ID );
wp_set_post_lock( $post_ID, $GLOBALS['current_user']->ID );
if ( current_user_can( 'edit_others_posts' ) ) {
if ( !empty($_POST['sticky']) )
stick_post($post_ID);
else
unstick_post($post_ID);
}
return $post_ID;
}
// Default post information to use when populating the "Write Post" form.
function get_default_post_to_edit() {
if ( !empty( $_REQUEST['post_title'] ) )
$post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));
else if ( !empty( $_REQUEST['popuptitle'] ) ) {
$post_title = wp_specialchars( stripslashes( $_REQUEST['popuptitle'] ));
$post_title = funky_javascript_fix( $post_title );
} else {
$post_title = '';
}
$post_content = '';
if ( !empty( $_REQUEST['content'] ) )
$post_content = wp_specialchars( stripslashes( $_REQUEST['content'] ));
else if ( !empty( $post_title ) ) {
$text = wp_specialchars( stripslashes( urldecode( $_REQUEST['text'] ) ) );
$text = funky_javascript_fix( $text);
$popupurl = clean_url($_REQUEST['popupurl']);
$post_content = '<a href="'.$popupurl.'">'.$post_title.'</a>'."\n$text";
}
if ( !empty( $_REQUEST['excerpt'] ) )
$post_excerpt = wp_specialchars( stripslashes( $_REQUEST['excerpt'] ));
else
$post_excerpt = '';
$post->ID = 0;
$post->post_name = '';
$post->post_author = '';
$post->post_date = '';
$post->post_status = 'draft';
$post->post_type = 'post';
$post->to_ping = '';
$post->pinged = '';
$post->comment_status = get_option( 'default_comment_status' );
$post->ping_status = get_option( 'default_ping_status' );
$post->post_pingback = get_option( 'default_pingback_flag' );
$post->post_category = get_option( 'default_category' );
$post->post_content = apply_filters( 'default_content', $post_content);
$post->post_title = apply_filters( 'default_title', $post_title );
$post->post_excerpt = apply_filters( 'default_excerpt', $post_excerpt);
$post->page_template = 'default';
$post->post_parent = 0;
$post->menu_order = 0;
return $post;
}
function get_default_page_to_edit() {
$page = get_default_post_to_edit();
$page->post_type = 'page';
return $page;
}
// Get an existing post and format it for editing.
function get_post_to_edit( $id ) {
$post = get_post( $id, OBJECT, 'edit' );
if ( $post->post_type == 'page' )
$post->page_template = get_post_meta( $id, '_wp_page_template', true );
return $post;
}
function post_exists($title, $content = '', $post_date = '') {
global $wpdb;
if (!empty ($post_date))
$post_date = $wpdb->prepare("AND post_date = %s", $post_date);
if (!empty ($title))
return $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_title = %s $post_date", $title) );
else
if (!empty ($content))
return $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_content = %s $post_date", $content) );
return 0;
}
// Creates a new post from the "Write Post" form using $_POST information.
function wp_write_post() {
global $user_ID;
if ( 'page' == $_POST['post_type'] ) {
if ( !current_user_can( 'edit_pages' ) )
return new WP_Error( 'edit_pages', __( 'You are not allowed to create pages on this blog.' ) );
} else {
if ( !current_user_can( 'edit_posts' ) )
return new WP_Error( 'edit_posts', __( 'You are not allowed to create posts or drafts on this blog.' ) );
}
// Check for autosave collisions
$temp_id = false;
if ( isset($_POST['temp_ID']) ) {
$temp_id = (int) $_POST['temp_ID'];
if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
$draft_ids = array();
foreach ( $draft_ids as $temp => $real )
if ( time() + $temp > 86400 ) // 1 day: $temp is equal to -1 * time( then )
unset($draft_ids[$temp]);
if ( isset($draft_ids[$temp_id]) ) { // Edit, don't write
$_POST['post_ID'] = $draft_ids[$temp_id];
unset($_POST['temp_ID']);
update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
return edit_post();
}
}
$translated = _wp_translate_postdata( false );
if ( is_wp_error($translated) )
return $translated;
// Create the post.
$post_ID = wp_insert_post( $_POST );
if ( is_wp_error( $post_ID ) )
return $post_ID;
if ( empty($post_ID) )
return 0;
add_meta( $post_ID );
// Reunite any orphaned attachments with their parent
if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
$draft_ids = array();
if ( $draft_temp_id = (int) array_search( $post_ID, $draft_ids ) )
_relocate_children( $draft_temp_id, $post_ID );
if ( $temp_id && $temp_id != $draft_temp_id )
_relocate_children( $temp_id, $post_ID );
// Update autosave collision detection
if ( $temp_id ) {
$draft_ids[$temp_id] = $post_ID;
update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
}
// Now that we have an ID we can fix any attachment anchor hrefs
_fix_attachment_links( $post_ID );
wp_set_post_lock( $post_ID, $GLOBALS['current_user']->ID );
return $post_ID;
}
function write_post() {
$result = wp_write_post();
if( is_wp_error( $result ) )
wp_die( $result->get_error_message() );
else
return $result;
}
//
// Post Meta
//
function add_meta( $post_ID ) {
global $wpdb;
$post_ID = (int) $post_ID;
$protected = array( '_wp_attached_file', '_wp_attachment_metadata', '_wp_old_slug', '_wp_page_template' );
$metakeyselect = $wpdb->escape( stripslashes( trim( $_POST['metakeyselect'] ) ) );
$metakeyinput = $wpdb->escape( stripslashes( trim( $_POST['metakeyinput'] ) ) );
$metavalue = maybe_serialize( stripslashes( (trim( $_POST['metavalue'] ) ) ));
$metavalue = $wpdb->escape( $metavalue );
if ( ('0' === $metavalue || !empty ( $metavalue ) ) && ((('#NONE#' != $metakeyselect) && !empty ( $metakeyselect) ) || !empty ( $metakeyinput) ) ) {
// We have a key/value pair. If both the select and the
// input for the key have data, the input takes precedence:
if ('#NONE#' != $metakeyselect)
$metakey = $metakeyselect;
if ( $metakeyinput)
$metakey = $metakeyinput; // default
if ( in_array($metakey, $protected) )
return false;
wp_cache_delete($post_ID, 'post_meta');
$wpdb->query( $wpdb->prepare("INSERT INTO $wpdb->postmeta
(post_id,meta_key,meta_value ) VALUES (%s, %s, %s)",
$post_ID, $metakey, $metavalue) );
return $wpdb->insert_id;
}
return false;
} // add_meta
function delete_meta( $mid ) {
global $wpdb;
$mid = (int) $mid;
$post_id = $wpdb->get_var( $wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
wp_cache_delete($post_id, 'post_meta');
return $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
}
// Get a list of previously defined keys
function get_meta_keys() {
global $wpdb;
$keys = $wpdb->get_col( "
SELECT meta_key
FROM $wpdb->postmeta
GROUP BY meta_key
ORDER BY meta_key" );
return $keys;
}
function get_post_meta_by_id( $mid ) {
global $wpdb;
$mid = (int) $mid;
$meta = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
if ( is_serialized_string( $meta->meta_value ) )
$meta->meta_value = maybe_unserialize( $meta->meta_value );
return $meta;
}
// Some postmeta stuff
function has_meta( $postid ) {
global $wpdb;
return $wpdb->get_results( $wpdb->prepare("SELECT meta_key, meta_value, meta_id, post_id
FROM $wpdb->postmeta WHERE post_id = %d
ORDER BY meta_key,meta_id", $postid), ARRAY_A );
}
function update_meta( $meta_id, $meta_key, $meta_value ) {
global $wpdb;
$protected = array( '_wp_attached_file', '_wp_attachment_metadata', '_wp_old_slug', '_wp_page_template' );
if ( in_array($meta_key, $protected) )
return false;
$post_id = $wpdb->get_var( $wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_id = %d", $meta_id) );
wp_cache_delete($post_id, 'post_meta');
$meta_value = maybe_serialize( stripslashes( $meta_value ));
$meta_id = (int) $meta_id;
$data = compact( 'meta_key', 'meta_value' );
$where = compact( 'meta_id' );
return $wpdb->update( $wpdb->postmeta, $data, $where );
}
//
// Private
//
// Replace hrefs of attachment anchors with up-to-date permalinks.
function _fix_attachment_links( $post_ID ) {
$post = & get_post( $post_ID, ARRAY_A );
$search = "#<a[^>]+rel=('|\")[^'\"]*attachment[^>]*>#ie";
// See if we have any rel="attachment" links
if ( 0 == preg_match_all( $search, $post['post_content'], $anchor_matches, PREG_PATTERN_ORDER ) )
return;
$i = 0;
$search = "#[\s]+rel=(\"|')(.*?)wp-att-(\d+)\\1#i";
foreach ( $anchor_matches[0] as $anchor ) {
if ( 0 == preg_match( $search, $anchor, $id_matches ) )
continue;
$id = (int) $id_matches[3];
// While we have the attachment ID, let's adopt any orphans.
$attachment = & get_post( $id, ARRAY_A );
if ( ! empty( $attachment) && ! is_object( get_post( $attachment['post_parent'] ) ) ) {
$attachment['post_parent'] = $post_ID;
// Escape data pulled from DB.
$attachment = add_magic_quotes( $attachment);
wp_update_post( $attachment);
}
$post_search[$i] = $anchor;
$post_replace[$i] = preg_replace( "#href=(\"|')[^'\"]*\\1#e", "stripslashes( 'href=\\1' ).get_attachment_link( $id ).stripslashes( '\\1' )", $anchor );
++$i;
}
$post['post_content'] = str_replace( $post_search, $post_replace, $post['post_content'] );
// Escape data pulled from DB.
$post = add_magic_quotes( $post);
return wp_update_post( $post);
}
// Move child posts to a new parent
function _relocate_children( $old_ID, $new_ID ) {
global $wpdb;
$old_ID = (int) $old_ID;
$new_ID = (int) $new_ID;
return $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_parent = %d WHERE post_parent = %d", $new_ID, $old_ID) );
}
function get_available_post_statuses($type = 'post') {
$stati = wp_count_posts($type);
return array_keys(get_object_vars($stati));
}
function wp_edit_posts_query( $q = false ) {
global $wpdb;
if ( false === $q )
$q = $_GET;
$q['m'] = isset($q['m']) ? (int) $q['m'] : 0;
$q['cat'] = isset($q['cat']) ? (int) $q['cat'] : 0;
$post_stati = array( // array( adj, noun )
'publish' => array(__('Published'), __('Published posts'), __ngettext_noop('Published (%s)', 'Published (%s)')),
'future' => array(__('Scheduled'), __('Scheduled posts'), __ngettext_noop('Scheduled (%s)', 'Scheduled (%s)')),
'pending' => array(__('Pending Review'), __('Pending posts'), __ngettext_noop('Pending Review (%s)', 'Pending Review (%s)')),
'draft' => array(__('Draft'), _c('Drafts|manage posts header'), __ngettext_noop('Draft (%s)', 'Drafts (%s)')),
'private' => array(__('Private'), __('Private posts'), __ngettext_noop('Private (%s)', 'Private (%s)')),
);
$post_stati = apply_filters('post_stati', $post_stati);
$avail_post_stati = get_available_post_statuses('post');
$post_status_q = '';
if ( isset($q['post_status']) && in_array( $q['post_status'], array_keys($post_stati) ) ) {
$post_status_q = '&post_status=' . $q['post_status'];
$post_status_q .= '&perm=readable';
}
if ( isset($q['post_status']) && 'pending' === $q['post_status'] ) {
$order = 'ASC';
$orderby = 'modified';
} elseif ( isset($q['post_status']) && 'draft' === $q['post_status'] ) {
$order = 'DESC';
$orderby = 'modified';
} else {
$order = 'DESC';
$orderby = 'date';
}
wp("post_type=post&what_to_show=posts$post_status_q&posts_per_page=15&order=$order&orderby=$orderby");
return array($post_stati, $avail_post_stati);
}
function get_available_post_mime_types($type = 'attachment') {
global $wpdb;
$types = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_mime_type FROM $wpdb->posts WHERE post_type = %s", $type));
return $types;
}
function wp_edit_attachments_query( $q = false ) {
global $wpdb;
if ( false === $q )
$q = $_GET;
$q['m'] = isset( $q['m'] ) ? (int) $q['m'] : 0;
$q['cat'] = isset( $q['cat'] ) ? (int) $q['cat'] : 0;
$q['post_type'] = 'attachment';
$q['post_status'] = 'any';
$q['posts_per_page'] = 15;
$post_mime_types = array( // array( adj, noun )
'image' => array(__('Images'), __('Manage Images'), __ngettext_noop('Image (%s)', 'Images (%s)')),
'audio' => array(__('Audio'), __('Manage Audio'), __ngettext_noop('Audio (%s)', 'Audio (%s)')),
'video' => array(__('Video'), __('Manage Video'), __ngettext_noop('Video (%s)', 'Video (%s)')),
);
$post_mime_types = apply_filters('post_mime_types', $post_mime_types);
$avail_post_mime_types = get_available_post_mime_types('attachment');
if ( isset($q['post_mime_type']) && !array_intersect( (array) $q['post_mime_type'], array_keys($post_mime_types) ) )
unset($q['post_mime_type']);
wp($q);
return array($post_mime_types, $avail_post_mime_types);
}
function postbox_classes( $id, $page ) {
$current_user = wp_get_current_user();
if ( $closed = get_usermeta( $current_user->ID, 'closedpostboxes_'.$page ) ) {
if ( !is_array( $closed ) ) return '';
return in_array( $id, $closed )? 'if-js-closed' : '';
} else {
if ( 'tagsdiv' == $id || 'categorydiv' == $id ) return '';
else return 'if-js-closed';
}
}
function get_sample_permalink($id, $title=null, $name = null) {
$post = &get_post($id);
if (!$post->ID) {
return array('', '');
}
$original_status = $post->post_status;
$original_date = $post->post_date;
$original_name = $post->post_name;
// Hack: get_permalink would return ugly permalink for
// drafts, so we will fake, that our post is published
if (in_array($post->post_status, array('draft', 'pending'))) {
$post->post_status = 'publish';
$post->post_date = date('Y-m-d H:i:s');
$post->post_name = sanitize_title($post->post_name? $post->post_name : $post->post_title, $post->ID);
}
// If the user wants to set a new name -- override the current one
// Note: if empty name is supplied -- use the title instead, see #6072
if (!is_null($name)) {
$post->post_name = sanitize_title($name? $name : $title, $post->ID);
}
$permalink = get_permalink($post, true);
// Handle page hierarchy
if ( 'page' == $post->post_type ) {
$uri = get_page_uri($post->ID);
$uri = untrailingslashit($uri);
$uri = strrev( stristr( strrev( $uri ), '/' ) );
$uri = untrailingslashit($uri);
if ( !empty($uri) )
$uri .='/';
$permalink = str_replace('%pagename%', "${uri}%pagename%", $permalink);
}
$permalink = array($permalink, apply_filters('editable_slug', $post->post_name));
$post->post_status = $original_status;
$post->post_date = $original_date;
$post->post_name = $original_name;
return $permalink;
}
function get_sample_permalink_html($id, $new_title=null, $new_slug=null) {
$post = &get_post($id);
list($permalink, $post_name) = get_sample_permalink($post->ID, $new_title, $new_slug);
if (false === strpos($permalink, '%postname%') && false === strpos($permalink, '%pagename%')) {
return '';
}
$title = __('Click to edit this part of the permalink');
if (strlen($post_name) > 30) {
$post_name_abridged = substr($post_name, 0, 14). '&hellip;' . substr($post_name, -14);
} else {
$post_name_abridged = $post_name;
}
$post_name_html = '<span id="editable-post-name" title="'.$title.'">'.$post_name_abridged.'</span><span id="editable-post-name-full">'.$post_name.'</span>';
$display_link = str_replace(array('%pagename%','%postname%'), $post_name_html, $permalink);
$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink">' . $display_link . "</span>\n";
$return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug" onclick="edit_permalink(' . $id . '); return false;">' . __('Edit') . "</a></span>\n";
return $return;
}
// false: not locked or locked by current user
// int: user ID of user with lock
function wp_check_post_lock( $post_id ) {
global $current_user;
if ( !$post = get_post( $post_id ) )
return false;
$lock = get_post_meta( $post->ID, '_edit_lock', true );
$last = get_post_meta( $post->ID, '_edit_last', true );
$time_window = apply_filters( 'wp_check_post_lock_window', AUTOSAVE_INTERVAL * 2 );
if ( $lock && $lock > time() - $time_window && $last != $current_user->ID )
return $last;
return false;
}
function wp_set_post_lock( $post_id ) {
global $current_user;
if ( !$post = get_post( $post_id ) )
return false;
if ( !$current_user || !$current_user->ID )
return false;
$now = time();
if ( !add_post_meta( $post->ID, '_edit_lock', $now, true ) )
update_post_meta( $post->ID, '_edit_lock', $now );
if ( !add_post_meta( $post->ID, '_edit_last', $current_user->ID, true ) )
update_post_meta( $post->ID, '_edit_last', $current_user->ID );
}
/**
* wp_create_post_autosave() - creates autosave data for the specified post from $_POST data
*
* @package WordPress
* @subpackage Post Revisions
* @since 2.6
*
* @uses _wp_translate_postdata()
* @uses _wp_post_revision_fields()
*/
function wp_create_post_autosave( $post_id ) {
$translated = _wp_translate_postdata( true );
if ( is_wp_error( $translated ) )
return $translated;
// Only store one autosave. If there is already an autosave, overwrite it.
if ( $old_autosave = wp_get_post_autosave( $post_id ) ) {
$new_autosave = _wp_post_revision_fields( $_POST, true );
$new_autosave['ID'] = $old_autosave->ID;
return wp_update_post( $new_autosave );
}
// Otherwise create the new autosave as a special post revision
return _wp_put_post_revision( $_POST, true );
}