how to check if XML node exists??

[homerjsimpson]

how do i check if a node exists in an xml tree??

im using php5 dom functions.

thanks

[Weedpacket]

Use an XPath query to specify which node you want to locate. If the list returned is empty, the node isn't in the document.

[homerjsimpson]

This is the xml file I have:

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <soapenv:Header>
  <ebl:RequesterCredentials xmlns="urn:ebay:apis:eBLBaseComponents" xmlns:ebl="urn:ebay:apis:eBLBaseComponents" soapenv:mustUnderstand="0">
   <ebl:NotificationSignature xmlns:ebl="urn:ebay:apis:eBLBaseComponents">/9zSjcXsC6VqZ8XkDzYu/ZA==</ebl:NotificationSignature>
  </ebl:RequesterCredentials>
 </soapenv:Header>
 <soapenv:Body>
  <GetItemTransactionsResponse xmlns="urn:ebay:apis:eBLBaseComponents">
   <Timestamp>2007-03-25T08:06:30.254Z</Timestamp>
   <Ack>Success</Ack>
   <CorrelationID>171816430</CorrelationID>
   <Version>503</Version>
   <Build>e503_core_Bundled_4329350_R1</Build>
   <NotificationEventName>EndOfAuction</NotificationEventName>
   <RecipientUserID>digitalsales1</RecipientUserID>
   <PaginationResult>
    <TotalNumberOfPages>1</TotalNumberOfPages>
    <TotalNumberOfEntries>1</TotalNumberOfEntries>
   </PaginationResult>
   <HasMoreTransactions>false</HasMoreTransactions>
   <TransactionsPerPage>100</TransactionsPerPage>
   <PageNumber>1</PageNumber>
   <ReturnedTransactionCountActual>1</ReturnedTransactionCountActual>
   <Item>
    <AutoPay>false</AutoPay>
    <BuyerProtection>ItemIneligible</BuyerProtection>
    <BuyItNowPrice currencyID="USD">33.0</BuyItNowPrice>
    <Currency>USD</Currency>
    <ItemID>110017876641</ItemID>
    <ListingDetails>
     <StartTime>2007-03-23T14:00:17.000Z</StartTime>
     <EndTime>2007-03-25T08:06:25.000Z</EndTime>
     <ExpressListing>false</ExpressListing>
    </ListingDetails>
    <ListingType>Chinese</ListingType>
    <PaymentMethods>PayPal</PaymentMethods>
    <PrimaryCategory>
     <CategoryID>29792</CategoryID>
    </PrimaryCategory>
    <PrivateListing>false</PrivateListing>
    <Quantity>1</Quantity>
    <SecondaryCategory>
     <CategoryID>0</CategoryID>
    </SecondaryCategory>
    <Seller>
     <AboutMePage>false</AboutMePage>
     <EIASToken>nY+sHZ2PrBmdj6wVnY+sEZ2PdrA2dj6wFk4CnCpSGqQqdj6x9nY+seQ==</EIASToken>
     <Email>[e-mail]</Email>
     <FeedbackScore>10</FeedbackScore>
     <FeedbackPrivate>false</FeedbackPrivate>
     <FeedbackRatingStar>Yellow</FeedbackRatingStar>
     <IDVerified>true</IDVerified>
     <eBayGoodStanding>true</eBayGoodStanding>
     <NewUser>false</NewUser>
     <RegistrationDate>1995-01-01T19:59:59.000Z</RegistrationDate>
     <Site>US</Site>
     <Status>Confirmed</Status>
     <UserID>digitalsales1</UserID>
     <UserIDChanged>true</UserIDChanged>
     <UserIDLastChanged>2007-03-19T20:59:29.000Z</UserIDLastChanged>
     <VATStatus>NoVATTax</VATStatus>
     <SellerInfo>
      <AllowPaymentEdit>true</AllowPaymentEdit>
      <CheckoutEnabled>true</CheckoutEnabled>
      <CIPBankAccountStored>false</CIPBankAccountStored>
      <GoodStanding>true</GoodStanding>
      <LiveAuctionAuthorized>false</LiveAuctionAuthorized>
      <MerchandizingPref>OptIn</MerchandizingPref>
      <QualifiesForB2BVAT>false</QualifiesForB2BVAT>
      <SellerLevel>None</SellerLevel>
      <StoreOwner>false</StoreOwner>
      <ExpressEligible>false</ExpressEligible>
      <ExpressWallet>false</ExpressWallet>
      <SafePaymentExempt>false</SafePaymentExempt>
     </SellerInfo>
    </Seller>
    <SellingStatus>
     <BidCount>1</BidCount>
     <ConvertedCurrentPrice currencyID="USD">33.0</ConvertedCurrentPrice>
     <CurrentPrice currencyID="USD">33.0</CurrentPrice>
     <QuantitySold>1</QuantitySold>
     <ListingStatus>Completed</ListingStatus>
    </SellingStatus>
    <Site>US</Site>
    <StartPrice currencyID="USD">32.0</StartPrice>
    <Title>testing</Title>
    <GetItFast>false</GetItFast>
   </Item>
   <TransactionArray>
    <Transaction>
     <AmountPaid currencyID="USD">37.95</AmountPaid>
     <AdjustmentAmount currencyID="USD">0.0</AdjustmentAmount>
     <ConvertedAdjustmentAmount currencyID="USD">0.0</ConvertedAdjustmentAmount>
     <Buyer>
      <AboutMePage>false</AboutMePage>
      <EIASToken>nY+sHZ2PrBmdjd6wVnY+sEZ2PrA2dj6wFk4CnCpSLoQ6dj6x9nY+seQ==</EIASToken>
      <Email>[e-mail]</Email>
      <FeedbackScore>0</FeedbackScore>
      <FeedbackPrivate>false</FeedbackPrivate>
      <FeedbackRatingStar>None</FeedbackRatingStar>
      <IDVerified>false</IDVerified>
      <eBayGoodStanding>true</eBayGoodStanding>
      <NewUser>true</NewUser>
      <RegistrationDate>2007-03-21T01:52:47.000Z</RegistrationDate>
      <Site>US</Site>
      <Status>Confirmed</Status>
      <UserID>homerjsimpson</UserID>
      <UserIDChanged>false</UserIDChanged>
      <UserIDLastChanged>2007-03-21T01:52:46.000Z</UserIDLastChanged>
      <VATStatus>NoVATTax</VATStatus>
      <BuyerInfo>
       <ShippingAddress>
        <Name>homerj simpson</Name>
        <Street1>street</Street1>
        <Street2>pobox</Street2>
        <CityName>pittsburgh</CityName>
        <StateOrProvince>PA</StateOrProvince>
        <Country>US</Country>
        <CountryName>United States</CountryName>
        <Phone>[phone]</Phone>
        <PostalCode>15235</PostalCode>
        <AddressID>3467918</AddressID>
        <AddressOwner>eBay</AddressOwner>
       </ShippingAddress>
      </BuyerInfo>
      <UserAnonymized>false</UserAnonymized>
     </Buyer>
     <ShippingDetails>
      <ChangePaymentInstructions>true</ChangePaymentInstructions>
      <InsuranceFee currencyID="USD">0.0</InsuranceFee>
      <InsuranceOption>NotOffered</InsuranceOption>
      <InsuranceWanted>false</InsuranceWanted>
      <PaymentEdited>false</PaymentEdited>
      <SalesTax>
       <SalesTaxPercent>0.0</SalesTaxPercent>
       <ShippingIncludedInTax>false</ShippingIncludedInTax>
      </SalesTax>
      <ShippingServiceOptions>
       <ShippingService>USPSFirstClass</ShippingService>
       <ShippingServiceCost currencyID="USD">4.95</ShippingServiceCost>
       <ShippingServicePriority>1</ShippingServicePriority>
       <ExpeditedService>false</ExpeditedService>
       <ShippingTimeMin>2</ShippingTimeMin>
       <ShippingTimeMax>5</ShippingTimeMax>
      </ShippingServiceOptions>
      <InternationalShippingServiceOption>
       <ShippingService>USPSAirmailParcel</ShippingService>
       <ShippingServiceCost>6.95</ShippingServiceCost>
       <ShippingServicePriority>1</ShippingServicePriority>
       <ShipToLocation>Worldwide</ShipToLocation>
      </InternationalShippingServiceOption>
      <ShippingType>Flat</ShippingType>
      <SellingManagerSalesRecordNumber>282</SellingManagerSalesRecordNumber>
      <ThirdPartyCheckout>false</ThirdPartyCheckout>
      <TaxTable/>
      <GetItFast>false</GetItFast>
     </ShippingDetails>
     <ConvertedAmountPaid currencyID="USD">37.95</ConvertedAmountPaid>
     <ConvertedTransactionPrice currencyID="USD">33.0</ConvertedTransactionPrice>
     <CreatedDate>2007-03-25T08:06:25.000Z</CreatedDate>
     <DepositType>None</DepositType>
     <QuantityPurchased>1</QuantityPurchased>
     <Status>
      <eBayPaymentStatus>NoPaymentFailure</eBayPaymentStatus>
      <CheckoutStatus>CheckoutIncomplete</CheckoutStatus>
      <LastTimeModified>2007-03-25T08:06:25.000Z</LastTimeModified>
      <PaymentMethodUsed>None</PaymentMethodUsed>
      <CompleteStatus>Incomplete</CompleteStatus>
      <BuyerSelectedShipping>false</BuyerSelectedShipping>
     </Status>
     <TransactionID>0</TransactionID>
     <TransactionPrice currencyID="USD">33.0</TransactionPrice>
     <BestOfferSale>false</BestOfferSale>
     <ShippingServiceSelected>
      <ShippingInsuranceCost currencyID="USD">0.0</ShippingInsuranceCost>
      <ShippingService>USPSFirstClass</ShippingService>
      <ShippingServiceCost currencyID="USD">4.95</ShippingServiceCost>
     </ShippingServiceSelected>
     <TransactionPlatform>eBay</TransactionPlatform>
    </Transaction>
   </TransactionArray>
  </GetItemTransactionsResponse>
 </soapenv:Body>
</soapenv:Envelope>

That is the xml information I get from ebay. I tried to access the "ShippingServices" node with the following code.

$xml = simplexml_load_file("test.xml");

$result = $xml->xpath("//ShippingServices");

print_r($result);

It only returns an empty array and it returns an empty array with any node I try to query.

Array ( ) 

I then stumbled upon what seems to be a solution but with problems. I changed "xmlns=" to "xmlns:ns=" in the following line:

  <GetItemTransactionsResponse xmlns="urn:ebay:apis:eBLBaseComponents">

and the query for ShippingServices still returned an empty string. However When I tried "//RegistrationDate" it worked!

So to summarize: With the original xml file I could not retrieve any nodes but after I added ":ns" to that line only some queries work.

The queries return an empty array when I use no forward slashes "Shippingservices" for any node name as well, regardless of whether I add ns: to that line.

What is going on?

I am in need of urgent help. Thank you so much.

[homerjsimpson]

This is the xml file I have:

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <soapenv:Header>
  <ebl:RequesterCredentials xmlns="urn:ebay:apis:eBLBaseComponents" xmlns:ebl="urn:ebay:apis:eBLBaseComponents" soapenv:mustUnderstand="0">
   <ebl:NotificationSignature xmlns:ebl="urn:ebay:apis:eBLBaseComponents">/9zSjcXsC6VqZ8XkDzYu/ZA==</ebl:NotificationSignature>
  </ebl:RequesterCredentials>
 </soapenv:Header>
 <soapenv:Body>
  <GetItemTransactionsResponse xmlns="urn:ebay:apis:eBLBaseComponents">
   <Timestamp>2007-03-25T08:06:30.254Z</Timestamp>
   <Ack>Success</Ack>
   <CorrelationID>171816430</CorrelationID>
   <Version>503</Version>
   <Build>e503_core_Bundled_4329350_R1</Build>
   <NotificationEventName>EndOfAuction</NotificationEventName>
   <RecipientUserID>digitalsales1</RecipientUserID>
   <PaginationResult>
    <TotalNumberOfPages>1</TotalNumberOfPages>
    <TotalNumberOfEntries>1</TotalNumberOfEntries>
   </PaginationResult>
   <HasMoreTransactions>false</HasMoreTransactions>
   <TransactionsPerPage>100</TransactionsPerPage>
   <PageNumber>1</PageNumber>
   <ReturnedTransactionCountActual>1</ReturnedTransactionCountActual>
   <Item>
    <AutoPay>false</AutoPay>
    <BuyerProtection>ItemIneligible</BuyerProtection>
    <BuyItNowPrice currencyID="USD">33.0</BuyItNowPrice>
    <Currency>USD</Currency>
    <ItemID>110017876641</ItemID>
    <ListingDetails>
     <StartTime>2007-03-23T14:00:17.000Z</StartTime>
     <EndTime>2007-03-25T08:06:25.000Z</EndTime>
     <ExpressListing>false</ExpressListing>
    </ListingDetails>
    <ListingType>Chinese</ListingType>
    <PaymentMethods>PayPal</PaymentMethods>
    <PrimaryCategory>
     <CategoryID>29792</CategoryID>
    </PrimaryCategory>
    <PrivateListing>false</PrivateListing>
    <Quantity>1</Quantity>
    <SecondaryCategory>
     <CategoryID>0</CategoryID>
    </SecondaryCategory>
    <Seller>
     <AboutMePage>false</AboutMePage>
     <EIASToken>nY+sHZ2PrBmdj6wVnY+sEZ2PdrA2dj6wFk4CnCpSGqQqdj6x9nY+seQ==</EIASToken>
     <Email>[e-mail]</Email>
     <FeedbackScore>10</FeedbackScore>
     <FeedbackPrivate>false</FeedbackPrivate>
     <FeedbackRatingStar>Yellow</FeedbackRatingStar>
     <IDVerified>true</IDVerified>
     <eBayGoodStanding>true</eBayGoodStanding>
     <NewUser>false</NewUser>
     <RegistrationDate>1995-01-01T19:59:59.000Z</RegistrationDate>
     <Site>US</Site>
     <Status>Confirmed</Status>
     <UserID>digitalsales1</UserID>
     <UserIDChanged>true</UserIDChanged>
     <UserIDLastChanged>2007-03-19T20:59:29.000Z</UserIDLastChanged>
     <VATStatus>NoVATTax</VATStatus>
     <SellerInfo>
      <AllowPaymentEdit>true</AllowPaymentEdit>
      <CheckoutEnabled>true</CheckoutEnabled>
      <CIPBankAccountStored>false</CIPBankAccountStored>
      <GoodStanding>true</GoodStanding>
      <LiveAuctionAuthorized>false</LiveAuctionAuthorized>
      <MerchandizingPref>OptIn</MerchandizingPref>
      <QualifiesForB2BVAT>false</QualifiesForB2BVAT>
      <SellerLevel>None</SellerLevel>
      <StoreOwner>false</StoreOwner>
      <ExpressEligible>false</ExpressEligible>
      <ExpressWallet>false</ExpressWallet>
      <SafePaymentExempt>false</SafePaymentExempt>
     </SellerInfo>
    </Seller>
    <SellingStatus>
     <BidCount>1</BidCount>
     <ConvertedCurrentPrice currencyID="USD">33.0</ConvertedCurrentPrice>
     <CurrentPrice currencyID="USD">33.0</CurrentPrice>
     <QuantitySold>1</QuantitySold>
     <ListingStatus>Completed</ListingStatus>
    </SellingStatus>
    <Site>US</Site>
    <StartPrice currencyID="USD">32.0</StartPrice>
    <Title>testing</Title>
    <GetItFast>false</GetItFast>
   </Item>
   <TransactionArray>
    <Transaction>
     <AmountPaid currencyID="USD">37.95</AmountPaid>
     <AdjustmentAmount currencyID="USD">0.0</AdjustmentAmount>
     <ConvertedAdjustmentAmount currencyID="USD">0.0</ConvertedAdjustmentAmount>
     <Buyer>
      <AboutMePage>false</AboutMePage>
      <EIASToken>nY+sHZ2PrBmdjd6wVnY+sEZ2PrA2dj6wFk4CnCpSLoQ6dj6x9nY+seQ==</EIASToken>
      <Email>[e-mail]</Email>
      <FeedbackScore>0</FeedbackScore>
      <FeedbackPrivate>false</FeedbackPrivate>
      <FeedbackRatingStar>None</FeedbackRatingStar>
      <IDVerified>false</IDVerified>
      <eBayGoodStanding>true</eBayGoodStanding>
      <NewUser>true</NewUser>
      <RegistrationDate>2007-03-21T01:52:47.000Z</RegistrationDate>
      <Site>US</Site>
      <Status>Confirmed</Status>
      <UserID>homerjsimpson</UserID>
      <UserIDChanged>false</UserIDChanged>
      <UserIDLastChanged>2007-03-21T01:52:46.000Z</UserIDLastChanged>
      <VATStatus>NoVATTax</VATStatus>
      <BuyerInfo>
       <ShippingAddress>
        <Name>homerj simpson</Name>
        <Street1>street</Street1>
        <Street2>pobox</Street2>
        <CityName>pittsburgh</CityName>
        <StateOrProvince>PA</StateOrProvince>
        <Country>US</Country>
        <CountryName>United States</CountryName>
        <Phone>[phone]</Phone>
        <PostalCode>15235</PostalCode>
        <AddressID>3467918</AddressID>
        <AddressOwner>eBay</AddressOwner>
       </ShippingAddress>
      </BuyerInfo>
      <UserAnonymized>false</UserAnonymized>
     </Buyer>
     <ShippingDetails>
      <ChangePaymentInstructions>true</ChangePaymentInstructions>
      <InsuranceFee currencyID="USD">0.0</InsuranceFee>
      <InsuranceOption>NotOffered</InsuranceOption>
      <InsuranceWanted>false</InsuranceWanted>
      <PaymentEdited>false</PaymentEdited>
      <SalesTax>
       <SalesTaxPercent>0.0</SalesTaxPercent>
       <ShippingIncludedInTax>false</ShippingIncludedInTax>
      </SalesTax>
      <ShippingServiceOptions>
       <ShippingService>USPSFirstClass</ShippingService>
       <ShippingServiceCost currencyID="USD">4.95</ShippingServiceCost>
       <ShippingServicePriority>1</ShippingServicePriority>
       <ExpeditedService>false</ExpeditedService>
       <ShippingTimeMin>2</ShippingTimeMin>
       <ShippingTimeMax>5</ShippingTimeMax>
      </ShippingServiceOptions>
      <InternationalShippingServiceOption>
       <ShippingService>USPSAirmailParcel</ShippingService>
       <ShippingServiceCost>6.95</ShippingServiceCost>
       <ShippingServicePriority>1</ShippingServicePriority>
       <ShipToLocation>Worldwide</ShipToLocation>
      </InternationalShippingServiceOption>
      <ShippingType>Flat</ShippingType>
      <SellingManagerSalesRecordNumber>282</SellingManagerSalesRecordNumber>
      <ThirdPartyCheckout>false</ThirdPartyCheckout>
      <TaxTable/>
      <GetItFast>false</GetItFast>
     </ShippingDetails>
     <ConvertedAmountPaid currencyID="USD">37.95</ConvertedAmountPaid>
     <ConvertedTransactionPrice currencyID="USD">33.0</ConvertedTransactionPrice>
     <CreatedDate>2007-03-25T08:06:25.000Z</CreatedDate>
     <DepositType>None</DepositType>
     <QuantityPurchased>1</QuantityPurchased>
     <Status>
      <eBayPaymentStatus>NoPaymentFailure</eBayPaymentStatus>
      <CheckoutStatus>CheckoutIncomplete</CheckoutStatus>
      <LastTimeModified>2007-03-25T08:06:25.000Z</LastTimeModified>
      <PaymentMethodUsed>None</PaymentMethodUsed>
      <CompleteStatus>Incomplete</CompleteStatus>
      <BuyerSelectedShipping>false</BuyerSelectedShipping>
     </Status>
     <TransactionID>0</TransactionID>
     <TransactionPrice currencyID="USD">33.0</TransactionPrice>
     <BestOfferSale>false</BestOfferSale>
     <ShippingServiceSelected>
      <ShippingInsuranceCost currencyID="USD">0.0</ShippingInsuranceCost>
      <ShippingService>USPSFirstClass</ShippingService>
      <ShippingServiceCost currencyID="USD">4.95</ShippingServiceCost>
     </ShippingServiceSelected>
     <TransactionPlatform>eBay</TransactionPlatform>
    </Transaction>
   </TransactionArray>
  </GetItemTransactionsResponse>
 </soapenv:Body>
</soapenv:Envelope>

That is the xml information I get from ebay. I need to access the "ShippingServices" node.

$xml = simplexml_load_file("test.xml");

$result = $xml->xpath("//ShippingServices");

print_r($result);

It only returns an empty array and it returns an empty array with any node I try to query.

Array ( ) 

I then stumbled upon what seems to be a solution but with problems. I changed "xmlns=" to "xmlns:ns=" in the following line:

  <GetItemTransactionsResponse xmlns="urn:ebay:apis:eBLBaseComponents">

and the query for ShippingServices still returned an empty string. However When I tried "//RegistrationDate" it worked!

So to summarize: With the original xml file I could not retrieve any nodes but after I added ":ns" to that line only some queries work.

The queries return an empty array when I use no forward slashes "Shippingservices" for any node name as well, regardless of whether I add ns: to that line.

What is going on?

I am in need of urgent help. Thank you so much.

UPDATE

Actually all queries seem to work only after I add ":ns=" to that line.

I also tried inserting the namespace decleration in the query itself without modifiying the root elements namespace decleration and it returns the following error:

This is what I tried

$xml = simplexml_load_file("test.xml");

$result = $xml->xpath("//ns:GetItemTransactionsResponse");

print_r($result);

resulted in the following error:

Undefined namespace prefix xpath

What's going on??

Thanks

[homerjsimpson]

ok

It seems like the default namespace in the original xml document needs a namespace decleration. I declared my own namespace with the following:

$xml->registerXPathNamespace("s", "urn:ebay:apis:eBLBaseComponents");

The queries work now.

will I encounter any problems by doing this?

thanks

[Shrike]

You were looking for a node called ShippingServices, I think it's singular i.e. ShippingService. Maybe just a typo on this thread though 😉

[homerjsimpson]

eeeek thanks:rolleyes: 😉

[bradgrafelman]

Don't forget to mark this thread resolved (if it is).