note 117380 added to domnode.insertbefore

Note that supplying the same node for $newnode and $refnode leads to an E_WARNING ("Couldn't add newnode as the previous sibling of refnode"). For example imagine one wanted to make $newnode the first child of its parent by doing: <?php $firstSibling = $newnode->parentNode->firstChild; // Bad: $newnode->parentNode->insertBefore( $newnode, $firstSibling ); ?> This would generate a warning if it already was the first child of its parent, since $newnode and $firstSibling are identical. Easy to work around though: <?php $firstSibling = $newnode->parentNode->firstChild; // Better: if( $newnode !== $firstSibling ) { $newnode->parentNode->insertBefore( $newnode, $firstSibling ); } ?> ---- Server IP: 72.52.91.14 Probable Submitter: 82.2.183.78 ---- Manual Page -- http://php.net/manual/en/domnode.insertbefore.php Edit -- https://master.php.net/note/edit/117380 Del: integrated -- https://master.php.net/note/delete/117380/integrated Del: useless -- https://master.php.net/note/delete/117380/useless Del: bad code -- https://master.php.net/note/delete/117380/bad+code Del: spam -- https://master.php.net/note/delete/117380/spam Del: non-english -- https://master.php.net/note/delete/117380/non-english Del: in docs -- https://master.php.net/note/delete/117380/in+docs Del: other reasons-- https://master.php.net/note/delete/117380 Reject -- https://master.php.net/note/reject/117380 Search -- https://master.php.net/manage/user-notes.php