phpjsonbitcoinblockchainblockchain.info-api

Parsing Decoded JSON in PHP (blokchain API)


Hello I am trying to extract some info from a json format page

The page is : https://blockchain.info/fr/rawaddr/1BQLNJtMDKmMZ4PyqVFfRuBNvoGhjigBKF

this link allows to get all bitcoin transactions from an address. All the quotation marks confuse me, I can not see clearly

I want to display everything like the original blockchain website Blockchain Display view The beginning will be something like that

$json = file_get_contents("https://blockchain.info/fr/rawaddr/1BQLNJtMDKmMZ4PyqVFfRuBNvoGhjigBKF");
var_dump(json_decode($json));

I can extract basic info from JSO to php, but here there is too much transactions and I think we need to use a loop to display everything but I don't know how to do that If someone can display for me in php the 5 first transactions it will be very sympathic.

Thanks a lot in advance youw ill really help me if you can do that !


Solution

  • If you goal is to display all Tx info you want to do that.

    $json = file_get_contents("http://blockchain.info/fr/rawaddr/1BQLNJtMDKmMZ4PyqVFfRuBNvoGhjigBKF");
    $txs = json_decode($json,1)['txs'];
    echo"<pre>"; //just to get a human readable display
    foreach($txs as $txinfo){
        echo"A new tx";
        //will display the full tx data
        print_r($txinfo);
    }
    
    echo"</pre>";
    

    Note a blockchain transaction can be a little complexe since one transaction can have multiple input and multiple outputs. you might want to cycle trough outputs as well to display all addresses who received bitcoin from a transaction in that case you can simply add another foreach output

    $json = file_get_contents("http://blockchain.info/fr/rawaddr/1BQLNJtMDKmMZ4PyqVFfRuBNvoGhjigBKF");
    $txs = json_decode($json,1)['txs'];
    echo"<pre>"; //just to get a human readable display
    foreach($txs as $txinfo){
        echo"A new tx";
        //will display the full tx data
        print_r($txinfo);
        // will cycle trough all output for each tx
        foreach ($txinfo['out'] as $outgoingTransaction)
        {
            //Will display the receiving address
           $receivingAddress = $outgoingTransaction['addr'];
           //will get the amount sent in satoshis
           $receivingAmountInSatoshi = $outgoingTransaction['value'];
    
           echo"<br>1BQLNJtMDKmMZ4PyqVFfRuBNvoGhjigBKF sent to $receivingAddress  $receivingAmountInSatoshi satoshis <br>";
    
        }
    
    }
    

    a more advanced code to add tx understanding logic

    $walletAddress = '1AWKFrvFYuCC7ef2m2zX73pWu1C15FRGjR' ;
    $json = file_get_contents("http://blockchain.info/fr/rawaddr/$walletAddress");
    $txs = json_decode($json,1)['txs'];
    echo"<pre>"; //just to get a human readable display
    
    foreach($txs as $txinfo){
    
        $spendingTx = false ;
        $totalSpent = 0 ;
        $totalReceived = 0;
    
        echo"<p>Txid = $txinfo[hash]<br>";
        //print_r($txinfo);
    
        // we need to find out if the address is the sender or the receiver
        $senderData = reset($txinfo['inputs']); //using reset to get only the first input
        if ($senderData['prev_out']['addr'] ==$walletAddress ){
            //the address is the sender meaning the address is spending
            $spendingTx = true ;
    
        }
    
       //it's a spend tx then we cycle trough receivers
        if ($spendingTx) {
    
            foreach ($txinfo['out'] as $outgoingTransaction) {
                //Will display the receiving address
                $receivingAddress = $outgoingTransaction['addr'];
                //will get the amount sent in satoshis
                $receivingAmountInSatoshi = $outgoingTransaction['value'];
                $totalSpent = $totalSpent + $receivingAmountInSatoshi ;
                echo "<br>$walletAddress sent to $receivingAddress  $receivingAmountInSatoshi satoshis <br>";
    
            }
    
            echo "<br>Total spent = $totalSpent" ;
    
        }
            //it is not a spending tx so it's a receceiving tx
            else {
    
                foreach ($txinfo['out'] as $outgoingTransaction) {
    
                    //We keep only receiving data concerning current wallet
                    if ($outgoingTransaction['addr'] == $walletAddress) {
                        //Will display the receiving address
                        $receivingAddress = $outgoingTransaction['addr'];
                        //will get the amount sent in satoshis
                        $receivingAmountInSatoshi = $outgoingTransaction['value'];
                        $senderAddress = $senderData['prev_out']['addr'];
                        $totalReceived = $receivingAmountInSatoshi;
                        echo "<br>$walletAddress received $receivingAmountInSatoshi satoshis from $senderAddress<br>";
    
                    }
    
                }
                echo "<br>Total received = $totalReceived" ;
    
            }
    
            echo"<br>end tx </p>";
    }
    
    echo"</pre>";