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[2007-06-12 08:10 UTC] kenashkov at gmail dot com
Description: ------------ The evaluation of the Xpath expressions is not relative to the node against which they are called ([2]). Worse - even after cloning a node from the structure and evaluating the xpath, the xpath expression seems to be evaluated against the original structure, not against the new one (which is a copy of a part of the original) ([3]). This was discussed in the dev-list here: http://marc.info/?l=php-dev&m=118001203709813&w=2 If this is not a bug, but expected result, I think a note addressing this behaviour must be added in the docs. Reproduce code: --------------- $str = '<rootnode><level1_node1><level2_node1></level2_node1></level1_node1><level1_node2></level1_node2></rootnode>'; $x = new SimpleXMLElement($str); //[1] $r1 = $x->xpath('/*'); print $r1[0]->getName().' '; //[2] $r2 = $x->level1_node1[0]->xpath('/*'); print $r2[0]->getName().' '; //[3] $z = clone $x->level1_node1[0]; $r3 = $z->xpath('/*'); print $r3[0]->getName().' '; Expected result: ---------------- rootnode level1_node1 level1_node1 Actual result: -------------- rootnode rootnode rootnode PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Yes - I use absolute expression. But at least in the last example [3]: $z = clone $x->level1_node1[0]; $r3 = $z->xpath('/*'); print $r3[0]->getName().' '; I use the $z object - not the x. And the $z object does not has any node called rootnode. The expression is again evaluated against the $x structure, not the $z. This could be a problem in the case: $z = clone $x->level1_node1[0]; function do_something($z) { $z->xpath('/*');//some absolute expression } Where the function do_something is totally unaware of the existance of the $x var. If this is still expected then how one can evaluate an absolute xpath expression inside the do_something function, as it will always do it for the $x structure, not the locally available $z structure. I think at least this must be documented and a workaround must be provide in the docs.