1--TEST--
2SimpleXMLElement->addAttribute()
3--EXTENSIONS--
4simplexml
5--FILE--
6<?php
7    $simple = simplexml_load_file(__DIR__."/book.xml");
8    $simple->addAttribute('type','novels');
9
10    var_dump($simple->attributes());
11    echo "Done";
12?>
13--EXPECT--
14object(SimpleXMLElement)#2 (1) {
15  ["@attributes"]=>
16  array(1) {
17    ["type"]=>
18    string(6) "novels"
19  }
20}
21Done
22