How to convert DOMNodeList object into array

Question

I have this code:

     $dom = new DOMDocument();
     $dom->load(\'file.xml\');
     $names = $dom->getElementsByTagName(\'name\');

N

Answer 1

$dom = new DOMDocument();
$dom->load('file.xml');
$names = $dom->getElementsByTagName('name');
$headlines = array();

foreach($names as $name) {
    $headline = array();
    if($name->childNodes->length) {
        foreach($name->childNodes as $i) {
            $headline[$i->nodeName] = $i->nodeValue;
        }
    }

    $headlines[] = $headline;
} 

Answer 2

Assuming you want the actual values and not to create an array of DOM nodes:

foreach($nodelist as $node) {
    $values[] = $node->nodeValue;
}

Answer 3

Just iterate trough the elements and put them into an array:

$names_array = array();
foreach ($names as $name) {
    $names_array[] = $name; // this is a DOMNode instance
    // you might want to have the textContent of them like this
    $names_array[] = $name->textContent;
}

This way they still will be DOMNode instances, you might want to get their textContent property.

Answer 4

Why doesn't (array) work? Because a DOMNodeList object has only one property, length, and it's of integer type:

If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccessible; private variables have the class name prepended to the variable name; protected variables have a '*' prepended to the variable name. These prepended values have null bytes on either side.

Since a DOMNodeList implements the Traversable interface, it's fairly easy to create the array yourself:

$array = array();
foreach($names as $node){
    $array[] = $node;
}

---

Edit: I've removed the initial explanation because it doesn't apply here. What the manual means is that properties with numeric names are passed to the array but cannot be read:

<?php

class Foo{
    public function __construct(){
        $this->{123} = 456;
    }
}

$array = (array)new Foo;
var_dump($array);
var_dump($array['123']);

array(1) {
  ["123"]=>
  int(456)
}

Notice: Undefined offset: 123 in D:\tmp\borrame.php on line 11
NULL

The explanation is probably more on the line that DOMNodeList is not a user object created with PHP code but a builtin object defined in C, so different rules apply.

Answer 5

Use iterator_to_array() to convert a DomNodeList to an Array

$document = new DomDocument();
$document->load('test.xrds');
$nodeList = $document->getElementsByTagName('Type');
$array = iterator_to_array($nodeList);