PHP SimpleXML循环问题

Question

I am trying to do a foreach using xPath. It's working fine and looping through the XML.

My question is can I somehow use a while statement with it. I basically need to find each value of a certain attribute but not for the entire XML. I want the foreach to stop once it hits a certain attribute.

Example:

<InvoiceRet>

    <TxnID>23827-1290392819</TxnID>
    <TimeCreated>2010-11-21T21:26:59-05:00</TimeCreated>

        <InvoiceLineRet>
            <TxnLineID>23829-1290392819</TxnLineID>
        </InvoiceLineRet>

        <InvoiceLineRet>
            <TxnLineID>2382A-1290392819</TxnLineID>
        </InvoiceLineRet>

</InvoiceRet>

<InvoiceRet>

    <TxnID>2382F-1290392820</TxnID>

        <InvoiceLineRet>
            <TxnLineID>2382B-1290392819</TxnLineID>
        </InvoiceLineRet>

                    <InvoiceLineRet>
            <TxnLineID>2382B-1290392819</TxnLineID>
        </InvoiceLineRet>

</InvoiceRet>

I basically need to loop through the first set of but not the second set. So I was hoping that I can stop the loop when it hits the second .

The problem is I have no idea how to do it.

Any help would be great.

Thanks!

Answer 1

If you're only looking to get the first one all the time then, you could just break the loob after getting the first one.

foreach ($TxnID as $t){
     echo $t;
     break;
}