Create a post from every image in wordpress media gallery

////////////////////////////////////////////////////////////////////////////////////
//                                                                                //
//        Create a post from every image in wordpress media gallery               //
//                                                                                //
////////////////////////////////////////////////////////////////////////////////////
//If you have the image in your media library you can just loop through them and create post via wp_insert_post.

// using wp_insert_post() function
// snippet from the Codex

    // $post = array(
        // 'ID'             => [ <post id> ] // Are you updating an existing post?
        // 'post_content'   => [ <string> ] // The full text of the post.
        // 'post_name'      => [ <string> ] // The name (slug) for your post
        // 'post_title'     => [ <string> ] // The title of your post.
        // 'post_status'    => [ 'draft' | 'publish' | 'pending'| 'future' | 'private' | custom registered status ] // Default 'draft'.
        // 'post_type'      => [ 'post' | 'page' | 'link' | 'nav_menu_item' | custom post type ] // Default 'post'.
        // 'post_author'    => [ <user ID> ] // The user ID number of the author. Default is the current user ID.
        // 'ping_status'    => [ 'closed' | 'open' ] // Pingbacks or trackbacks allowed. Default is the option 'default_ping_status'.
        // 'post_parent'    => [ <post ID> ] // Sets the parent of the new post, if any. Default 0.
        // 'menu_order'     => [ <order> ] // If new post is a page, sets the order in which it should appear in supported menus. Default 0.
        // 'to_ping'        => // Space or carriage return-separated list of URLs to ping. Default empty string.
        // 'pinged'         => // Space or carriage return-separated list of URLs that have been pinged. Default empty string.
        // 'post_password'  => [ <string> ] // Password for post, if any. Default empty string.
        // 'guid'           => // Skip this and let Wordpress handle it, usually.
        // 'post_content_filtered' => // Skip this and let Wordpress handle it, usually.
        // 'post_excerpt'   => [ <string> ] // For all your post excerpt needs.
        // 'post_date'      => [ Y-m-d H:i:s ] // The time post was made.
        // 'post_date_gmt'  => [ Y-m-d H:i:s ] // The time post was made, in GMT.
        // 'comment_status' => [ 'closed' | 'open' ] // Default is the option 'default_comment_status', or 'closed'.
        // 'post_category'  => [ array(<category id>, ...) ] // Default empty.
        // 'tags_input'     => [ '<tag>, <tag>, ...' | array ] // Default empty.
        // 'tax_input'      => [ array( <taxonomy> => <array | string> ) ] // For custom taxonomies. Default empty.
        // 'page_template'  => [ <string> ] // Requires name of template file, eg template.php. Default empty.
    // );  
    //wp_insert_post($new_post);
    
//end snippet options




// code starts here, enter in functions or child theme

function import_post_from_imgs() {
    $images = get_posts('post_type=attachment&post_status=inherit&posts_per_page=-1');
  
    // just a minimal security check
    if ( ! current_user_can('publish_posts') ) return;
    if ( ! empty($images) ) { foreach ( $images as $image) {
    
    // prevent duplicate if for some reason the function is called more than once
    if ( get_post_meta($image->ID, '_imported', true) ) continue;
    $post = array(
        'post_title' => $image->post_title,
        'post_content' => '',
        'post_content' => 'publish',
        'post_status'    => 'draft', // Default 'draft'.
        'post_type'      => 'ouipinupgallery' // Default 'post'.
    );
    
    // insert post
    $postid = wp_insert_post( $post );
    if ( $postid ) {
      
      // set the image as thumbnail
      set_post_thumbnail($postid, $image->ID);
      update_post_meta($image->ID, '_imported', 1);
    }
  } }
}

function go_import_post_from_imgs() {
  if ( isset($_GET['import_images']) ) import_post_from_imgs();
}

add_action('admin_init', 'go_import_post_from_imgs');






// NOTES

In code above the import function is triggered on admin init, when the $_GET variable 'import_images' is setted.

So, you have to login into your dashboard and then the url of your page is sonething like http://example.com/wp-admin/. Now jus manually add '?import_images=1' so your url became http://example.com/wp-admin/?import_images=1 and hit Enter.

After some seconds you should see the posts created from images.

Be aware that this function create a post from all images you have updated. 
If you want exclude some images, you can take 2 ways:

1. before if ( get_post_meta($image->ID, '_imported', true) ) continue;
look for the IDs of the images you want to exclude and add this 2 lines:

$exclude = array(12, 256, 587); // the ids you want to skip
if ( in_array($image->ID, $exclude) ) continue;


2. Previous method is good if you want to exclude a little number of images, if you want to exclude more, you can register a custom taxonomy for the attachments and assign a particular term to images you want to skip (e.g. 'skip'). 
See https://github.com/mzdebo/GMMediaTags to add buk function. 
After that, Assuming the taxonomy is called 'media-tag' and you have added the 'skip' term to the images you want to skip, 
add before if ( get_post_meta($image->ID, '_imported', true) ) continue; 
add this line:

 if ( has_term('skip', 'media-tag', $image->ID) ) continue;