Problems printing array of XML [closed] - php

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I have the following code that takes the "money" all my XML field but only 1 record and shows me this error:
Error:
Warning: SimpleXMLElement::__construct(): Entity: line 1: parser error : Start tag expected, '<' not found in /var/www/client/lib/class/index.php on line 34
Warning: SimpleXMLElement::__construct(): %PDF-1.4 in /var/www/client/lib/class/index.php on line 34
Warning: SimpleXMLElement::__construct(): ^ in /var/www/client/lib/class/index.php on line 34
Fatal error: Uncaught exception 'Exception' with message 'String could not be parsed as XML' in /var/www/client/lib/class/index.php:34 Stack trace: #0 /var/www/client/lib/class/index.php(34): SimpleXMLElement->__construct('%PDF-1.4?%?????...') #1 /var/www/client/lib/class/index.php(47): uuid->select() #2 {main} thrown in /var/www/client/lib/class/index.php on line 34
My code:
$data = $this -> conect -> conexion();
$dbquery = $data -> prepare("SELECT *
FROM FILE
ORDER BY ID
");
$dbquery->execute();
while($rows = $dbquery->fetch(PDO::FETCH_ASSOC)){
$string = $rows['BYTES'];
$tuxml = new SimpleXMLElement($string);
echo $tuxml->attributes()->Moneda;

Answer 1

Analysis
Reading the exception information properly reveals the origin of the problem:
Entity: line 1: parser error : Start tag expected, '<' not found
Conclusion: You try to parse something that is no valid XML
SimpleXMLElement->__construct('%PDF-1.4?%?????...')
Conclusion: Looks like you are trying to parse a PDF file as indicated by the magic number "%PDF":
Magic number(s):
All PDF files start with the characters '%PDF-' using the PDF
version number, e.g., '%PDF-1.4'. These characters are in US-
ASCII encoding.
(Source: RFC 3778, Page 9, https://www.rfc-editor.org/rfc/rfc3778)
Resolutions
Ensure your source contains only valid XML files
Try to detect the mime type of the file and skip non XML files
Add a surrounding try-catch block to handle files not parseable as XML