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<DOMNode::lookupNamespaceURIDOMNode::normalize>
^DOMNodeLast updated: Mon, 26 Oct 2026

DOMNode::lookupPrefix

(PHP 5, PHP 7, PHP 8)

DOMNode::lookupPrefix — Gets the namespace prefix of the node based on the namespace URI

Description

public function DOMNode::lookupPrefix(string $namespace): ?string

Gets the namespace prefix of the node based on the namespace URI.

Parameters

namespace

The namespace URI.

Return Values

The prefix of the namespace or null on error.

See Also


<DOMNode::lookupNamespaceURIDOMNode::normalize>
^DOMNodeLast updated: Mon, 26 Oct 2026