A plugin that makes it possible to upload Apple AR Quick Look files (.usdz + .reality) and glTF-binary (.glb) in WordPress Media Manager

allow-ar3d-in-wordpress-media-library.php

<?php
/**
 * Plugin Name: Allow GLB, USDZ and Reality mime in Wordpress Media Library
 * Plugin URI: https://gist.github.com/PixelPartner/d3362a9fad57165ba9d5bd76a3f5b4ee
 * Description: A plugin that makes it possible to upload AR files in Media Manager. Don't forget to add the three MIME types in web server config if necessary! No settings necessary, just activate and upload USDZ files in media library as usually. Tested with WP 5.2.3
 * Version: 1.0.0
 * Author: Thomas Kumlehn
 * Author URI: https://config-xr.mobi
 */

function pix_filter_ar3d_wp_check_filetype_and_ext( $data, $file, $filename, $mimes ) {
	if ( ! empty( $data['ext'] ) && ! empty( $data['type'] ) ) {
		return $data;
	}
	$registered_file_types = [
		'glb' => 'model/gltf-binary',
		'usdz' => 'model/vnd.usdz+zip|application/octet-stream|model/x-vnd.usdz+zip',
		'reality' => 'model/vnd.reality'
	];
	$filetype = wp_check_filetype( $filename, $mimes );
	if ( ! isset( $registered_file_types[ $filetype['ext'] ] ) ) {
		return $data;
	}
	return [
		'ext' => $filetype['ext'],
		'type' => $filetype['type'],
		'proper_filename' => $data['proper_filename'],
	];
}

function pix_allow_ar3d( $mime_types ) {
	if ( ! in_array( 'glb', $mime_types ) ) { 
		$mime_types['glb'] = 'model/gltf-binary';
	}
	if ( ! in_array( 'usdz', $mime_types ) ) { 
		$mime_types['usdz'] = 'model/vnd.usdz+zip|application/octet-stream|model/x-vnd.usdz+zip';
	}
	if ( ! in_array( 'reality', $mime_types ) ) { 
		$mime_types['reality'] = 'model/vnd.reality';
	}
	return $mime_types;
}
add_filter( 'wp_check_filetype_and_ext', 'pix_filter_ar3d_wp_check_filetype_and_ext', 10, 4 );
add_filter( 'upload_mimes', 'pix_allow_ar3d' );

?>