Sample SimpleXML usage for testing https://github.com/JetBrains/phpstorm-stubs/pull/245

simplexml-sample.php

<?php

$xml = <<<XML
<foo>
    <bar baz="bob">1<bing>bang</bing></bar>
    <bar>2</bar>
</foo>
XML;

$sx = simplexml_load_string($xml);

$a1 = $sx->bar;
$a1a = $a1->attributes()->baz;
$b1 = $sx->bar[0];
$b1a = $b1->attributes()->baz;
$c1 = $sx->bar['baz'];
$d1 = $sx->bar[0]['baz'];
$e1 = $sx->bar->bing;
$f1 = $sx->bar[0]->bing;
$g1 = $sx->bar[0]->bing[0];

$a2 = $sx[0]->bar;
$b2 = $sx[0]->bar[0];
$c2 = $sx[0]->bar['baz'];
$d2 = $sx[0]->bar[0]['baz'];
$e2 = $sx[0]->bar->bing;
$f2 = $sx[0]->bar[0]->bing;
$g2 = $sx[0]->bar[0]->bing[0];

$a3 = $sx->children()->bar;
$b3 = $sx->children()->bar[0];
$c3 = $sx->children()->bar['baz'];
$d3 = $sx->children()->bar[0]['baz'];
$e3 = $sx->children()->bar->bing;
$f3 = $sx->children()->bar[0]->bing;
$g3 = $sx->children()->bar[0]->bing[0];

$a4 = $sx[0]->children()->bar;
$b4 = $sx[0]->children()->bar[0];
$c4 = $sx[0]->children()->bar['baz'];
$d4 = $sx[0]->children()->bar[0]['baz'];
$e4 = $sx[0]->children()->bar->bing;
$f4 = $sx[0]->children()->bar[0]->bing;
$g4 = $sx[0]->children()->bar[0]->bing[0];

$c5 = $sx[0]->bar->attributes()->baz;
$d5 = $sx[0]->bar[0]->attributes()->baz;
$e5 = $sx[0]->bar->children()->bing;
$f5 = $sx[0]->bar[0]->children()->bing;

$c6 = $sx->bar->attributes()->baz;
$d6 = $sx->bar[0]->attributes()->baz;
$e6 = $sx->bar->children()->bing;
$f6 = $sx->bar[0]->children()->bing;