This WordPress code snippet provides a quick and easy way to duplicate or clone existing posts and pages on your WordPress site. This can be useful if you frequently need to create posts or pages with similar structure or content, saving you time and ensuring consistency.
The rd_duplicate_post_link function creates a ‘Duplicate’ action link in the row actions for each post and page. It does this by adding a ‘duplicate’ key to the $actions array for both the ‘post_row_actions’ and ‘page_row_actions’ filters.
Clicking the ‘Duplicate’ link sends a GET request to ‘admin.php’ with the action ‘rd_duplicate_post_as_draft’ and the ID of the post to duplicate. A nonce is also added to the request for security.
The rd_duplicate_post_as_draft function is then hooked to the ‘admin_action_rd_duplicate_post_as_draft’ action, which is triggered when the ‘rd_duplicate_post_as_draft’ action is requested. This function gets the original post and creates a new draft post with the same content, author, excerpt, title, type, and terms. It also copies all the post meta.
After the new post is created, the user is redirected to the ‘edit.php’ page with a ‘saved’ query variable set to ‘post_duplication_created’. The rudr_duplication_admin_notice function checks for this query variable and displays a success notice if found.
You can modify this snippet to suit your needs. For example, you could change the post status from ‘draft’ to ‘publish’ to auto-publish the duplicated posts, or you could change the post author to assign the duplicated posts to a different user. You could also modify the ‘rudr_duplication_admin_notice’ function to display a different message or no message at all.
// Add the duplicate link to action list for post_row_actions
// for "post" and custom post types
add_filter( 'post_row_actions', 'rd_duplicate_post_link', 10, 2 );
// for "page" post type
add_filter( 'page_row_actions', 'rd_duplicate_post_link', 10, 2 );
function rd_duplicate_post_link( $actions, $post ) {
if( ! current_user_can( 'edit_posts' ) ) {
return $actions;
}
$url = wp_nonce_url(
add_query_arg(
array(
'action' => 'rd_duplicate_post_as_draft',
'post' => $post->ID,
),
'admin.php'
),
basename(__FILE__),
'duplicate_nonce'
);
$actions[ 'duplicate' ] = '<a href="' . $url . '" title="Duplicate this item" rel="permalink">Duplicate</a>';
return $actions;
}
/*
* Function creates post duplicate as a draft and redirects then to the edit post screen
*/
add_action( 'admin_action_rd_duplicate_post_as_draft', 'rd_duplicate_post_as_draft' );
function rd_duplicate_post_as_draft(){
// check if post ID has been provided and action
if ( empty( $_GET[ 'post' ] ) ) {
wp_die( 'No post to duplicate has been provided!' );
}
// Nonce verification
if ( ! isset( $_GET[ 'duplicate_nonce' ] ) || ! wp_verify_nonce( $_GET[ 'duplicate_nonce' ], basename( __FILE__ ) ) ) {
return;
}
// Get the original post id
$post_id = absint( $_GET[ 'post' ] );
// And all the original post data then
$post = get_post( $post_id );
/*
* if you don't want current user to be the new post author,
* then change next couple of lines to this: $new_post_author = $post->post_author;
*/
$current_user = wp_get_current_user();
$new_post_author = $current_user->ID;
// if post data exists (I am sure it is, but just in a case), create the post duplicate
if ( $post ) {
// new post data array
$args = array(
'comment_status' => $post->comment_status,
'ping_status' => $post->ping_status,
'post_author' => $new_post_author,
'post_content' => $post->post_content,
'post_excerpt' => $post->post_excerpt,
'post_name' => $post->post_name,
'post_parent' => $post->post_parent,
'post_password' => $post->post_password,
'post_status' => 'draft',
'post_title' => $post->post_title,
'post_type' => $post->post_type,
'to_ping' => $post->to_ping,
'menu_order' => $post->menu_order
);
// insert the post by wp_insert_post() function
$new_post_id = wp_insert_post( $args );
/*
* get all current post terms ad set them to the new post draft
*/
$taxonomies = get_object_taxonomies( get_post_type( $post ) ); // returns array of taxonomy names for post type, ex array("category", "post_tag");
if( $taxonomies ) {
foreach ( $taxonomies as $taxonomy ) {
$post_terms = wp_get_object_terms( $post_id, $taxonomy, array( 'fields' => 'slugs' ) );
wp_set_object_terms( $new_post_id, $post_terms, $taxonomy, false );
}
}
// duplicate all post meta
$post_meta = get_post_meta( $post_id );
if( $post_meta ) {
foreach ( $post_meta as $meta_key => $meta_values ) {
if( '_wp_old_slug' == $meta_key ) { // do nothing for this meta key
continue;
}
foreach ( $meta_values as $meta_value ) {
add_post_meta( $new_post_id, $meta_key, $meta_value );
}
}
}
// finally, redirect to the edit post screen for the new draft
// wp_safe_redirect(
// add_query_arg(
// array(
// 'action' => 'edit',
// 'post' => $new_post_id
// ),
// admin_url( 'post.php' )
// )
// );
// exit;
// or we can redirect to all posts with a message
wp_safe_redirect(
add_query_arg(
array(
'post_type' => ( 'post' !== get_post_type( $post ) ? get_post_type( $post ) : false ),
'saved' => 'post_duplication_created' // just a custom slug here
),
admin_url( 'edit.php' )
)
);
exit;
} else {
wp_die( 'Post creation failed, could not find original post.' );
}
}
/*
* In case we decided to add admin notices
*/
add_action( 'admin_notices', 'rudr_duplication_admin_notice' );
function rudr_duplication_admin_notice() {
// Get the current screen
$screen = get_current_screen();
if ( 'edit' !== $screen->base ) {
return;
}
//Checks if settings updated
if ( isset( $_GET[ 'saved' ] ) && 'post_duplication_created' == $_GET[ 'saved' ] ) {
echo '<div class="notice notice-success is-dismissible"><p>Post copy created.</p></div>';
}
}