parser error : Start tag expected, '<' not found

Question

I am using PHP for the first time. I am using the php sample for uploading image on ebay sandbox. I am getting the following error on running the PHP file:

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Answer 1

Do a var_dump($respXmlStr); my guess is that this string is not valid XML.

As per the simplexml-load-string documentation, the first parameter is expected to be A well-formed XML string - http://php.net/manual/en/function.simplexml-load-string.php