php が xml ドキュメントを送り返すのを JavaScript が認識していないようです。phpコード:
$domtree = new DOMDocument('1.0', 'UTF-8');
/* append it to the document created */
$xmlRoot = $domtree->appendChild($domtree->createElement("root"));
foreach (glob('./img/photos/*.*') as $filename) {
//echo $filename;
$xmlRoot->appendChild($domtree->createElement("image",$filename));
}
/* get the xml printed */
echo $domtree->saveXML();
上記のコードの出力は次のとおりです。
<?xml version="1.0" encoding="UTF-8"?>
<root><image>./img/photos/2012-02-26 17.02.12.jpg</image>
<image>./img/photos/2012-03-09 08.21.48.jpg</image>
<image>./img/photos/2012-07-21 14.09.39.jpg</image>
<image>./img/photos/2012-07-25 15.25.17.jpg</image>
<image>./img/photos/2012-08-04 17.54.38.jpg</image>
<image>./img/photos/2012-08-04 23.36.30.jpg</image>
<image>./img/photos/2012-08-06 06.08.43.jpg</image>
<image>./img/photos/2012-08-07 20.57.34.jpg</image>
<image>./img/photos/2012-08-09 20.40.11.jpg</image>
<image>./img/photos/2012-08-25 20.54.05.jpg</image>
<image>./img/photos/2012-09-07 11.19.50.jpg</image>
<image>./img/photos/2012-09-08 15.53.27.jpg</image>
<image>./img/photos/2013-01-30 19.19.16.jpg</image>
<image>./img/photos/2013-01-31 09.48.39.jpg</image></root>
これを AJAX で呼び出すと、AJAXRequest.responseXML を呼び出すと null が返されます。
編集: AJAX 要求コード:
function requestImages()
{
request=new XMLHttpRequest();
request.open("GET", "getPhotos.php");
request.onreadystatechange=showPhotos;
request.send();
}
function showPhotos()
{
if ((request.readyState == 4)) {
doc=request.responseXML; // This returns null
}
}