1--TEST-- 2SimpleXML: adding/removing attributes (single) 3--EXTENSIONS-- 4simplexml 5--FILE-- 6<?php 7$xml =<<<EOF 8<people> 9 <person name="Joe"></person> 10</people> 11EOF; 12 13$people = simplexml_load_string($xml); 14var_dump($people->person[0]['name']); 15var_dump($people->person[0]['age']); 16$person = $people->person[0]; 17$person['name'] = "XXX"; 18var_dump($people->person[0]['name']); 19$people->person[0]['age'] = 30; 20var_dump($people->person[0]['age']); 21echo "---Unset:---\n"; 22unset($people->person[0]['age']); 23echo "---Unset?---\n"; 24var_dump($people->person[0]['age']); 25var_dump(isset($people->person[0]['age'])); 26echo "---Unsupported---\n"; 27var_dump($people->person[0]['age']); 28$people->person['age'] += 5; 29var_dump($people->person[0]['age']); 30?> 31--EXPECTF-- 32object(SimpleXMLElement)#%d (1) { 33 [0]=> 34 string(3) "Joe" 35} 36NULL 37object(SimpleXMLElement)#%d (1) { 38 [0]=> 39 string(3) "XXX" 40} 41object(SimpleXMLElement)#%d (1) { 42 [0]=> 43 string(2) "30" 44} 45---Unset:--- 46---Unset?--- 47NULL 48bool(false) 49---Unsupported--- 50NULL 51object(SimpleXMLElement)#%d (1) { 52 [0]=> 53 string(1) "5" 54} 55