Convert XML to Array - Using a decorator

JsonSimpleXMLElementDecorator.php

<?php

/**
 * Class JsonSimpleXMLElementDecorator
 * 
 * @link https://hakre.wordpress.com/2013/07/09/simplexml-and-json-encode-in-php-part-i/
 *
 * Implement JsonSerializable for SimpleXMLElement as a Decorator
 */
class JsonSimpleXMLElementDecorator implements JsonSerializable
{
    const DEF_DEPTH = 512;

    /**
     * @var SimpleXMLElement
     */
    private $subject;

    private $options = ['@attributes' => TRUE, '@text' => TRUE, 'depth' => self::DEF_DEPTH];

    public function __construct(SimpleXMLElement $element, $useAttributes = TRUE, $useText = TRUE, $depth = self::DEF_DEPTH)
    {

        $this->subject = $element;

        if (!is_null($useAttributes)) {
            $this->useAttributes($useAttributes);
        }
        if (!is_null($useText)) {
            $this->useText($useText);
        }
        if (!is_null($depth)) {
            $this->setDepth($depth);
        }
    }

    public function useAttributes($bool)
    {
        $this->options['@attributes'] = (bool)$bool;
    }

    public function useText($bool)
    {
        $this->options['@text'] = (bool)$bool;
    }

    public function setDepth($depth)
    {
        $this->options['depth'] = (int)max(0, $depth);
    }

    /**
     * Specify data which should be serialized to JSON
     *
     * @return mixed data which can be serialized by json_encode.
     */
    public function jsonSerialize()
    {
        $subject = $this->subject;

        $array = array();

        // json encode attributes if any.
        if ($this->options['@attributes']) {
            if ($attributes = $subject->attributes()) {
                $array['@attributes'] = array_map('strval', iterator_to_array($attributes));
            }
        }

        // traverse into children if applicable
        $children = $subject;
        $this->options = (array)$this->options;
        $depth = $this->options['depth'] - 1;
        if ($depth <= 0) {
            $children = [];
        }

        // json encode child elements if any. group on duplicate names as an array.
        foreach ($children as $name => $element) {
            /* @var SimpleXMLElement $element */
            $decorator = new self($element);
            $decorator->options = ['depth' => $depth] + $this->options;

            if (isset($array[$name])) {
                if (!is_array($array[$name])) {
                    $array[$name] = [$array[$name]];
                }
                $array[$name][] = $decorator;
            } else {
                $array[$name] = $decorator;
            }
        }

        // json encode non-whitespace element simplexml text values.
        $text = trim($subject);
        if (strlen($text)) {
            if ($array) {
                $this->options['@text'] && $array['@text'] = $text;
            } else {
                $array = $text;
            }
        }

        // return empty elements as NULL (self-closing or empty tags)
        if (!$array) {
            $array = NULL;
        }

        return $array;
    }
}

$xml = <<<XML
<?xml version="1.0" encoding="UTF-8" ?>
<root doc="profile">
    <!-- This is a comment... -->
    <first_name>Brian</first_name>
    <middle_name></middle_name>
    <last_name>Matovu</last_name>
    <languages>Luganda</languages>
    <languages>English</languages>
    <website>
        <![CDATA[http://bmatovu.com]]>
    </website>
    <frameworks>
        <php>Laravel</php>
        <php>Slim</php>
        <python>django</python>
    </frameworks>
    <accounts>
        <username>brian-admin</username>
        <role>admin</role>
    </accounts>
    <accounts>
        <username>bmatovu</username>
        <role>supervisor</role>
    </accounts>
    <packages>
        <multi-auth>
            <language>php</language>
            <frameworks>laravel</frameworks>
            <home-page>
                <![CDATA[https://github.com/mtvbrianking/multi-auth]]>
            </home-page>
        </multi-auth>
        <laravel-xml>
            <language>php</language>
            <framework>laravel</framework>
            <home-page>
                <![CDATA[https://github.com/mtvbrianking/laravel-xml]]>
            </home-page>
        </laravel-xml>
    </packages>
</root>
XML;

$_obj = simplexml_load_string($xml);    
$obj = new JsonSimpleXMLElementDecorator($_obj);

// print_r($obj);

// print json_encode($obj, true);

print json_encode([$_obj->getName() => $obj], true);

?>