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<?php $xml = new SimpleXMLElement('<items><item action="preview" /></items>'); foreach ($xml->xpath('/items/item') as $item) { var_dump($item); var_dump($item->xpath("(.)[@action='preview']/@action")); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
object(SimpleXMLElement)#2 (1) { ["@attributes"]=> array(1) { ["action"]=> string(7) "preview" } } array(1) { [0]=> object(SimpleXMLElement)#3 (1) { ["@attributes"]=> array(1) { ["action"]=> string(7) "preview" } } }

preferences:
187.86 ms | 404 KiB | 177 Q