Get Instagram media on WordPress using the current Instagram (Facebook) API (details: https://www.gsarigiannidis.gr/instagram-feed-api-after-june-2020/)

get_instagram_media.php

<?php 
/**
* Get Instagram media on WordPress using the current Instagram (Facebook) API
*
* @param $token // Info on how to retrieve the token: https://www.gsarigiannidis.gr/instagram-feed-api-after-june-2020/
* @param $user // User ID can be found using the Facebook debug tool: https://developers.facebook.com/tools/debug/accesstoken/
* @param int $limit // Add a limit to prevent excessive calls.
* @param string $fields // More options here: https://developers.facebook.com/docs/instagram-basic-display-api/reference/media
* @param array $restrict // Available options: IMAGE, VIDEO, CAROUSEL_ALBUM
*
* @return array|mixed // Use it like that (minimal example): get_instagram_media(TOKEN, USER_ID);
*/
function get_instagram_media(
	$token,
	$user,
	$limit = 10,
	$fields = 'media_url,permalink,media_type,caption',
	$restrict = [ 'IMAGE' ]
) {
	// The request URL. see: https://developers.facebook.com/docs/instagram-basic-display-api/reference/user
	$request_url = 'https://graph.instagram.com/' . $user . '?fields=media&access_token=' . $token;

	// We use transients to cache the results and fetch them once every hour, to avoid bumping into Instagram's limits (see: https://developers.facebook.com/docs/graph-api/overview/rate-limiting#instagram-graph-api)
	$output = get_transient( 'instagram_feed_' . $user ); // Our transient should have a unique name, so we pass the user id as an extra precaution.
	if ( false === ( $data = $output ) || empty( $output ) ) {
		// Prepare the data variable and set it as an empty array.
		$data = [];
		// Make the request
		$response      = wp_safe_remote_get( $request_url );
		$response_body = '';
		if ( is_array( $response ) && ! is_wp_error( $response ) ) {
			$response_body = json_decode( $response['body'] );
		}
		if ( $response_body && isset( $response_body->media->data ) ) {
			$i = 0;
			// Get each media item from it's ID and push it to the $data array.
			foreach ( $response_body->media->data as $media ) {
				if ( $limit > $i ) {
					$request_media_url = 'https://graph.instagram.com/' . $media->id . '?fields=' . $fields . '&access_token=' . $token;
					$media_response    = wp_safe_remote_get( $request_media_url );
					if ( is_array( $media_response ) && ! is_wp_error( $media_response ) ) {
						$media_body = json_decode( $media_response['body'] );
					}
					if ( in_array( $media_body->media_type, $restrict, true ) ) {
						$i ++;
						$data[] = $media_body;
					}
				}
			}
		}
		// Store the data in the transient and keep if for an hour.
		set_transient( 'instagram_feed_' . $user, $data, HOUR_IN_SECONDS );

		// Refresh the token to make sure it never expires (see: https://developers.facebook.com/docs/instagram-basic-display-api/guides/long-lived-access-tokens#refresh-a-long-lived-token)
		wp_safe_remote_get( 'https://graph.instagram.com/refresh_access_token?grant_type=ig_refresh_token&access_token=' . $token );
		$output = $data;
	}

	return $output;

}

Ah yes! Storing this data Locally as a back-up would be a great idea! Thanks for the response!

Also where do you recommend this code be placed? I am not a WordPress pro (yet) so I'm still not very confident on where to best house this kind of code within a WordPress structure.

As a general principle, I would store this in a plugin. For my personal use, I've included it on DareDev, the mu-plugin that I use on most of my sites. In general, anything that has to do with the site's appearance should go to the theme (e.g. the functions.php), and functionality should be on plugins. That way, you can keep the functionality when switching themes.

Thanks, this was super helpful. Instagram don't make it clear how to do this unless you know exactly what you're looking for

@gsarig I only can get one image. do you know what can be the problem?