(PHP 5 >= 5.2.0, PHP 7)
DOMNode::C14N — Canonicalize nodes to a string
$exclusive
[, bool $with_comments
[, array $xpath
[, array $ns_prefixes
]]]] ) : stringCanonicalize nodes to a string
exclusive
Enable exclusive parsing of only the nodes matched by the provided xpath or namespace prefixes.
with_comments
Retain comments in output.
xpath
An array of xpath
s to filter the nodes by.
ns_prefixes
An array of namespace prefixes to filter the nodes by.
Returns canonicalized nodes as a string 或者在失败时返回 FALSE