WordPress更新文章函数wp_update_post详解

 < ?php wp_update_post( $post ); ?>

// 更新编号为37的文章
  $my_post = array();
  $my_post['ID'] = 37;
  $my_post['post_content'] = 'This is the updated content.';
 
// Update the post into the database
  wp_update_post( $my_post );

$post

wp_insert_post()

wp_update_post() 位于 wp-includes/post.php.
 
/**
 * Update a post with new post data.
 *
 * The date does not have to be set for drafts. You can set the date and it will
 * not be overridden.
 *
 * @since 1.0.0
 *
 * @param array|object $postarr Post data. Arrays are expected to be escaped, objects are not.
 * @return int 0 on failure, Post ID on success.
 */
function wp_update_post($postarr = array()) {
 if ( is_object($postarr) ) {
  // non-escaped post was passed
  $postarr = get_object_vars($postarr);
  $postarr = add_magic_quotes($postarr);
 }
 
 // First, get all of the original fields
 $post = wp_get_single_post($postarr['ID'], ARRAY_A);
 
 // Escape data pulled from DB.
 $post = add_magic_quotes($post);
 
 // Passed post category list overwrites existing category list if not empty.
 if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
    && 0 != count($postarr['post_category']) )
  $post_cats = $postarr['post_category'];
 else
  $post_cats = $post['post_category'];
 
 // Drafts shouldn't be assigned a date unless explicitly done so by the user
 if ( isset( $post['post_status'] ) && in_array($post['post_status'], array('draft', 'pending', 'auto-draft')) && empty($postarr['edit_date']) &&
    ('0000-00-00 00:00:00' == $post['post_date_gmt']) )
  $clear_date = true;
 else
  $clear_date = false;
 
 // Merge old and new fields with new fields overwriting old ones.
 $postarr = array_merge($post, $postarr);
 $postarr['post_category'] = $post_cats;
 if ( $clear_date ) {
  $postarr['post_date'] = current_time('mysql');
  $postarr['post_date_gmt'] = '';
 }
 
 if ($postarr['post_type'] == 'attachment')
  return wp_insert_attachment($postarr);
 
 return wp_insert_post($postarr);
}