//Declare an address as a variable$btc_address = "1J9ikqFuwrzPbczsDkquA9uVYeq6dEehsj";//Get the balance using blockchaininfo API$addr_url = "https://blockchain.info/address/$btc_address?format=json";$json_addr = json_decode(file_get_contents($addr_url), true);$balance = $json_addr["final_balance"];//Display the balance on the screen in satoshisecho $balance;//Display on the screen as bitcoins$con_bal = $balance / 100000000;echo "<br>". $con_bal;