Undefined namespace in Xlsx reader for VML/Shapes

[benmag]

I've been having an issue where trying to read an XLSX file was throwing a SimpleXMLElement::xpath(): Undefined namespace prefix

[2025-06-09 00:56:18] local.ERROR: SimpleXMLElement::xpath(): Undefined namespace prefix {"userId":"1","exception":"[object] (ErrorException(code: 0): SimpleXMLElement::xpath(): Undefined namespace prefix at /var/www/html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Xlsx.php:1206)
[stacktrace]
#0 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(255): Illuminate\\Foundation\\Bootstrap\\HandleExceptions->handleError()
#1 [internal function]: Illuminate\\Foundation\\Bootstrap\\HandleExceptions->Illuminate\\Foundation\\Bootstrap\\{closure}()
#2 /var/www/html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Xlsx.php(1206): SimpleXMLElement->xpath()
#3 /var/www/html/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/BaseReader.php(199): PhpOffice\\PhpSpreadsheet\\Reader\\Xlsx->loadSpreadsheetFromFile()

What are the steps to reproduce?
php 8.3

phpspreadsheet v4.3.1

Attempt to read a XLSX file that triggers the Shapes path (https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Reader/Xlsx.php#L1177)

For reference the XML of my $shapes[0] that's resulting in the error is:

<ns1:shape type="#_x0000_t202" style="position:absolute; margin-left:59.25pt;margin-top:1.5pt;width:144px;height:79px;z-index:1;visibility:hidden" fillcolor="#ffffe1" ns0:insetmode="auto" id="_x0000_s1026">
	<ns1:fill color2="#ffffe1"/>
	<ns1:shadow color="black" obscured="t"/>
	<ns1:path ns0:connecttype="none"/>
	<ns1:textbox style="mso-direction-alt:auto">
		<div style="text-align:left"/>
	</ns1:textbox>
	<ns2:ClientData ObjectType="Note">
		<ns2:MoveWithCells/>
		<ns2:SizeWithCells/>
		<ns2:AutoFill>False</ns2:AutoFill>
		<ns2:Row>18</ns2:Row>
		<ns2:Column>14</ns2:Column>
	</ns2:ClientData>
</ns1:shape>  

Solution

Registering the following namespaces under the existing $shape->registerXPathNamespace('v', Namespaces::URN_VML) (https://github.com/PHPOffice/PhpSpreadsheet/blob/master/src/PhpSpreadsheet/Reader/Xlsx.php#L1180) allow it to gracefully handle this scenario

$shape->registerXPathNamespace('x', Namespaces::URN_VML);
$shape->registerXPathNamespace('o', Namespaces::URN_MSOFFICE);