Multi Photo Upload with Caption on Front End for Custom Post Type

WordPress stores the images as attachment post type, so it is possible to add the title to each of your gallery images.

For example,

 // $filename should be the path to a file in the upload directory.
 $filename="/path/to/uploads/2013/03/filename.jpg";

 // The ID of the post this attachment is for.
 $parent_post_id = 37;

 // Check the type of file. We'll use this as the 'post_mime_type'.
 $filetype = wp_check_filetype( basename( $filename ), null );

 // Get the path to the upload directory.
 $wp_upload_dir = wp_upload_dir();

 // Prepare an array of post data for the attachment.
 $attachment = array(
    'guid'           => $wp_upload_dir['url'] . "https://wordpress.stackexchange.com/" . basename(  $filename ), 
    'post_mime_type' => $filetype['type'],
    'post_title'     => preg_replace( '/\.[^.]+$/', '', basename( $filename ) ),
    'post_content'   => '',
    'post_status'    => 'inherit'
  );

 // Insert the attachment.
  $attach_id = wp_insert_attachment( $attachment, $filename, $parent_post_id   );

You can set your each gallery images Title as post title and can get the title using simple post function “get_the_title($your_attachment_id);”.

For more details,
example link

Hope this will help you.

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