在save_post操作上检查更新与新帖子

#1 楼

add_action( 'save_post', 'debug_save_post_update', 10, 3 );
function debug_save_post_update( $ID, $post, $update ) {

  echo '<pre>';
  print_r( $post ); echo '<br>';
  echo '$update == ';
  echo $update ? 'true' : 'false';

  //conditions
  if( ! $update && $post->post_status == "auto-draft" ) {
    // applies to new post
    echo ' && $post->post_status == "auto-draft"';
    //die();
  } else if ( ! $update ) {
    // applies basically to the (auto saved) revision 
    //die();
  } else {
    // applies to updating a published post
    // when there is a revision, which is normally the case, 
    // standard behavior of WordPress, then it is considered 
    // an update, which is where the confusion sets in
    // there are other methods, like checking time or post status
    // depending on your use case it might be more appropriate 
    // to use one of those alternatives 
    //die();
  }

  echo '</pre>';
  //die();
}

#2 楼

function check_new_vs_update( $post_id ){
    $myPost        = get_post($post_id);
    $post_created  = new DateTime( $myPost->post_date_gmt );
    $post_modified = new DateTime( $myPost->post_modified_gmt );
    $diff          = $created->diff( $modified );
    $seconds_difference = ((($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i)*60 + $diff->s;

    if( $seconds_difference <= 1 ){
        // New post
    }else{
        // Updated post
    }
}
add_action('save_post', 'check_new_vs_update' );

#3 楼

function attributes_save_postdata($post_id) {
  if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
  if (!wp_verify_nonce($_POST['_attributes_noncename'], plugin_basename(__FILE__))) return;
  if ('page' == $_POST['post_type']) {
    if (!current_user_can('edit_page', $post_id)) return;
  } else {
    if (!current_user_can('edit_post', $post_id)) return;
  }
  $termid = get_post_meta($post_id, '_termid', true);
  if ($termid != '') {
    // it's a new record
    $termid = 'update';
  } else {
    // it's an existing record
  }
  update_post_meta($post_id, '_termid', $termid);
}
add_action('save_post', 'attributes_save_postdata');

#4 楼

function save_func($ID, $post,$update) {

   if($update == false) {
     // do something if its first time publish
   } else {
     // Do something if its update
   }
}

add_action( 'save_post', 'save_func', 10, 3 );

#5 楼

#6 楼

#7 楼

function f4553265_check_post() {

    if (!get_posts($post_id)) {
    // if this is a new post get_posts($post_id) should return null
    } else {
    // $post_id already exists on the database
    }
}
add_action('save_post','f4553265_check_post');

#8 楼

$post_status = get_post_status();
if ( $post_status != 'draft' ) {
    //draft
} else { 
    //not a draft: can be published, pending, etc. 
}

#9 楼

add_action( 'save_post', 'test_save_post_check', 0, 3 );
function test_save_post_check( $post_ID, $post, $update ) {
    // other tests + this
    // checking the 'post-new' position from the '_wp_http_referer'
    if( strpos( wp_get_raw_referer(), 'post-new' ) > 0 ) {
        // new
    } else {
        // update
    }
}

#10 楼

 function wpse48678_check_is_post_new($post_id, $post, $update)
{
    if (false !== strpos($_POST['_wp_http_referer'], 'post-new.php')) {
        return true; // Or do something else.
    } else {
        return false; // Or do something else.
    }
}
add_action('save_post_{$post_type}', 'wpse48678_check_is_post_new', 10, 3);