Get amount of Bitcoins at an address with PHP

Question

I'm using Coinbase, but they don't have an API call to get the amount of Bitcoins per address, but only per account, which is a collection of addresses.

Does anyone have an API call for this? I'd prefer to not to reinvent the wheel by setting up my own Bitcoin server/daemon as suggested in this other SO thread:

How to check Bitcoin address balance from my application?

Answer 1

Hmm, would this work for you:

<?php
function getBalance($address) {
    return file_get_contents('https://blockchain.info/q/addressbalance/'. $address);
}

echo 'Address Balance: ' . getBalance('1EzwoHtiXB4iFwedPr49iywjZn2nnekhoj');

Using the https://blockchain.info/q API.

Answer 2

If you are checking the balance of a Coinbase address, you may not get the expected results because Coinbase shuffles your bitcoin around to different addresses internally. The only way to get the true balance is by account.

<?php
$accountId = '<Account Id>';
$account = $client->getAccount($accountId);
$balance = $account->getBalance();
$btc = $balance->getAmount();