The "Content is not allowed in prolog" error typically occurs when you try to parse an XML document that contains characters before the XML prolog (the <?xml ...?> declaration).
In PHP, you can use the simplexml_load_string function to check if a string is a valid XML without displaying a warning.
In PHP, you can use the output control functions to capture the output of a PHP script into a variable.
To see the actual XML generated by the PHP SOAP Client class, you can use the __getLastRequest() method.
You can use the xml library in Python to parse XML and get instances of a particular node attribute.
XML (Extensible Markup Language) is used to store and transport data. Learn how to accurately parse XML with PHP simpleXML library in this simple snippet.
To pretty print XML from Java, you can use the javax.xml.transform.Transformer class from the Java XML Transformer API.
To read XML using XPath in Java, you can use the javax.xml.xpath package.
To convert a java.util.Date object to an XMLGregorianCalendar in Java, you can use the toGregorianCalendar method of the DatatypeFactory class.