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@ 2014-06-13T04:58:51Z

<?php

function getDatiTrasmissione() {
	
			$header = '
				    <DatiTrasmissione>
				      <IdTrasmittente>
					<IdPaese>IT</IdPaese>
					<IdCodice>01234567890</IdCodice>
				      </IdTrasmittente>
				      <ProgressivoInvio>00001</ProgressivoInvio>
				      <FormatoTrasmissione>SDI10</FormatoTrasmissione>
				      <CodiceDestinatario>AAAAAA</CodiceDestinatario>
				      <ContattiTrasmittente>
				       <Telefono>060601</Telefono>
				       <Email>prova@mail.it</Email>
				      </ContattiTrasmittente>
				     </DatiTrasmissione>';
		
		return simplexml_load_string($header,'SimpleXMLElement', LIBXML_NOCDATA);





	}

	$headerdoc = new DOMDocument;
		$headerdoc->formatOutput = true;
		$headerdoc->loadXML("<FatturaElettronicaHeader></FatturaElettronicaHeader>");

		$node =  dom_import_simplexml(getDatiTrasmissione());
		$node  = $headerdoc->ownerDocument->importNode($node, TRUE);
		// And then append it to the "<root>" node
	    $headerdoc->appendChild($node);

echo $headerdoc->asXML();

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Call to a member function importNode() on null in /in/BvCOE:33 Stack trace: #0 {main} thrown in /in/BvCOE on line 33
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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