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<?php

$response = file_get_contents( 'https://gist.githubusercontent.com/rveitch/254d87beb6e05fc2f0b0196a8d5978f5/raw/09773af49391a101aba37662730c2e6e1216da74/troy_becker_featured_images.json' );
# Decode to ARRAY
$array = json_decode( $response, true );
foreach ( $array as $key => $value ) {
	$post_id = $value['post_id'];
	$featured_image_id = $value['featured_image_id'];
	//echo $post_id . ', ' . $featured_image_id . '<br>';
	
	// Update Thumbnail ID's
	update_post_meta( $post_id, '_thumbnail_id', $featured_image_id );

	echo 'Featured ID update complete';
}