Bug #80680 [Sus->Nab]: DOMNode::getNodePath() returns XPath that is invalid for DOMXPath::query()

Edit report at https://bugs.php.net/bug.php?id=80680&edit=1 ID: 80680 Updated by: cmb@php.net Reported by: andrey at email dot dp dot ua Summary: DOMNode::getNodePath() returns XPath that is invalid for DOMXPath::query() -Status: Suspended +Status: Not a bug Type: Bug Package: DOM XML related Operating System: Debian Linux PHP Version: Irrelevant Assigned To: cmb Block user comment: N Private report: N New Comment: Indeed, that has been recognized as issue in libxml2[1], so it's not a bug in PHP. [1] <https://mail.gnome.org/archives/xml/2021-February/msg00000.html> Previous Comments: ------------------------------------------------------------------------ [2021-01-28 14:07:55] cmb@php.net This looks like an upstream (i.e. libxml2) issue. xmlGetNodePath() returns the broken xpath /?, while, to my knowledge, a DTD shouldn't be addressable with any xpath query, i.e. xmlGetNodePath() should return NULL in this case. I've written to the xml mailing list[1], and suspend this ticket for the time being. [1] <https://mail.gnome.org/archives/xml/2021-January/msg00012.html> ------------------------------------------------------------------------ [2021-01-28 11:30:38] andrey at email dot dp dot ua Description: ------------ DOMNode::getNodePath() for DOMDocumentType node returns XPath value that is not valid for DOMXPath::query() Test script: --------------- <?php $html = <<<EOF <?xml version="1.0" encoding="UTF-8"?> <!doctype html> <html></html> EOF; $dom = new \DOMDocument(); $dom->loadHTML($html); $xpath = new \DOMXPath($dom); foreach ($dom->childNodes as $cur_child_node) { if (!$cur_child_node instanceof DOMDocumentType) { continue; } $DOMDocumentType_xpath = $cur_child_node->getNodePath(); echo "\$DOMDocumentType_xpath = ".$DOMDocumentType_xpath."\n"; $nodelist = $xpath->query($DOMDocumentType_xpath); var_dump($nodelist); } Expected result: ---------------- $DOMDocumentType_xpath = /? object(DOMNodeList)#7 (1) { ["length"]=> int(1) } Actual result: -------------- $DOMDocumentType_xpath = /? PHP Warning: DOMXPath::query(): Invalid expression in test_xpath.php on line 30 bool(false) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80680&edit=1