[WordPress] Add file to media library programmatically

gistfile1.php

<?php
$file = '/path/to/file.png';
$filename = basename($file);

$upload_file = wp_upload_bits($filename, null, file_get_contents($file));
if (!$upload_file['error']) {
	$wp_filetype = wp_check_filetype($filename, null );
	$attachment = array(
		'post_mime_type' => $wp_filetype['type'],
		'post_parent' => $parent_post_id,
		'post_title' => preg_replace('/\.[^.]+$/', '', $filename),
		'post_content' => '',
		'post_status' => 'inherit'
	);
	$attachment_id = wp_insert_attachment( $attachment, $upload_file['file'], $parent_post_id );
	if (!is_wp_error($attachment_id)) {
		require_once(ABSPATH . "wp-admin" . '/includes/image.php');
		$attachment_data = wp_generate_attachment_metadata( $attachment_id, $upload_file['file'] );
		wp_update_attachment_metadata( $attachment_id,  $attachment_data );
	}
}

Great script. I'm trying to insert an alt tag as well right away. How do you recommend accomplishing that?

great codee

Not working.

Fatal error: Call to undefined function wp_get_current_user() in /home/username/public_html/wp/wp-includes/capabilities.php on line 424

Perfect! Thank you!

Just registred to say thank you - this is indeed working great with latest Wordpress! You're the best, hissy!

Great code! Working perfect!

Just used with WP 4.5.2 for a custom migration script and it works fine.

how do I fill the $parent_post_id variable? if I put this code in function.php, and I will upload image like using the uploader in wp-admin/media-new.php

Great one, works perfect, Thanks a lot :)

Ty Mate, I have been looking for ages to get stuff working properly. Now it does!

Perfect.
Congratulations.

Nice man. it helps too much.

It's perfect....

thank you very much

works great!

This is fantastic! Thank you!!

This is just a code from WORDPRESS CODEX page... so lol... ppl dont like to read documentation...
https://codex.wordpress.org/Function_Reference/wp_insert_attachment

Great script, Thanks Man. Thank you so much.
Fantastic!

@qant This is NOT. The key point of this gist is using wp_upload_bits() function.

Worked great. Thanks!

It worked successfully! Thank you for this sample code!

Thanks for the snippet! Works great.

In case anyone gets the following order:
Fatal error: Call to undefined function wp_get_current_user()

Check out following post: https://stackoverflow.com/a/6127607

awesome stuff

Thanks man

Still works in 5.2, thanks for saving me a bunch of time! 👍

Hi guys,
I have a different case study.
I want to add a file to the media library without attaching it to any posts/pages.
That is, I do not want to use wp_insert_attachment() function.

Thanks

@oadekoya12 I think you can set the 'post_parent' => $parent_post_id, to null or an empty string so the media becomes "unattached".

@kensington133,
Thanks, It works.

Using this code for MP3s. Works great!

Any ideas how to get the Post ID of the newly created media to add a featured image?

@thegreentimtam $attachment_id is the newly created post id

Hey - been using this for a while and it works great.

However I have a new requirement where I just want to import images to Media Library, but NOT set as attachment to particular post.

Is that possible? All the functions here require a $parent_post_id

Sorry - just read the docs for wp_insert_attachment().. turns out you don't have to supply a parent id.

https://codex.wordpress.org/Function_Reference/wp_insert_attachment

Yup, you don't have to pass $parent_post_id if you don't want to attach it

This works consistently as long as you're not waiting for the reply. I am using a rest endpoint to generate products from a remote source and using a method link this to create the images.

I have found if you have more than a few media sizes this can easily risk timing out the web-server if it has an anywhere near reasonable wait time.

A site I'm using has 28 different media sizes and we never manage to run the wp_generate_attachment_metadata and get a reply before the timeout is reached. Annoyingly our service then assumes failure and tries again, and again and again. Eventually crashing the server and leaving us with hundreds of duplicate images!

Just recording this here as its top of google for timeouts regarding the use of this function.

@srjwebster
I am in the same situation. No solution for multiple uploads.

@srjwebster
I am in the same situation. No solution for multiple uploads.

@fabriziofeitosa I found that by removing some unused media sizes, and by turning off image optimisation plugin wp smush I could run this n a much shorter timeframe. A few seconds compared to several minutes. Definitely not a solution, something asynchronous seems necessary to do this on a frequent basis.

Script is very good and its worked.

Thanks!!

Life Saver