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# DomNode->replace_child

(no version information, might be only in CVS)

DomNode->replace_child -- Replaces a child

## Description

domelement DomNode->replace_child ( domelement oldnode, domelement newnode )

(PHP 4.2) This function replaces the child oldnode with the passed new node. If the new node is already a child it will not be added a second time. If the old node cannot be found the function returns `FALSE`. If the replacement succeeds the old node is returned.

(PHP 4.3) This function replaces the child oldnode with the passed newnode, even if the new node already is a child of the DomNode. If newnode was already inserted in the document it is first unlinked from its existing context. If the old node cannot be found the function returns `FALSE`. If the replacement succeeds the old node is returned. (This behaviour is according to the W3C specs).

See also domnode_append_child()

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