Bite the bullet and use a server with bitcoind, trust me, you'll thank me later. Webhosted API's have limitations, are often targeted by DDoS attacks, and will sometimes go offline for maintenance/upgrades. Run a node, be part of the community.
However, here's php code to monitor using a web service:
(You'll need to format the output, etc for the decimal places, etc)
However, here's php code to monitor using a web service:
Code:
function getBalance($address) {
return file_get_contents('https://blockchain.info/q/addressbalance/'. $address);
}
echo 'Address Balance: ' . getBalance('1CK6KHY6MHgYvmRQ4PAafKYDrg1ejbH1cE');
?>Cloverme is right, definitely go with running bitcoind. Especially since you are creating a gaming site, a 3rd party API will likely shut you down as they don't want to be pulled in to any legal issues for being your service provider.
As for "deposit detection" with bitcoind you can use the walletnotify feature and it will instantly run whatever code you want when new transactions are received. https://www.youtube.com/watch?v=o4BPt4RXOm4
