WordPress: Compare local and remote plugin versions (WordPress)

Compare local and remote plugin versions.php

<?php function my_current_plugin_version() {
	$plugin_data = get_plugin_data( __FILE__ );
	return $plugin_data['Version'];
}

function my_remote_plugin_version() {
	$str	= file_get_contents('https://rocketapps.com.au/files/open-graphite-pro/open-graphite-pro/info.json');
	$json	= json_decode($str, true);
	return $json['version'];
}

if(my_remote_plugin_version() > my_current_plugin_version()) {
    // New plugin is available
}