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>digitalsales@sales.com</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>liquitrade@gmail.com</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>(412) 778-7878</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).