Php - XML parsing issue

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XML

PHP

parsing

I have the following XML string:

<!--?xml version='1.0'?-->
   <catalog>
       <language>
           <name>Php</name>
           <type>Server Side</type>
       </language>
       <language>
           <name>JavaScript</name>
           <type>Client Side</type>
       </language>
	   <language>
           <name>Asp</name>
           <type>Server Side</type>
       </language>
   </catalog>

I need to parse it and convert it into JSON, using PHP.
This is what I tried:

$xml = simplexml_load_string($xmlData);
foreach ($xml->language as $lang) {
$json[] = [
'name' => $lang->name,
'type' => $lang->type
];
}
var_export(json_encode($json));

Result:

'[{"name":{"0":"Php"},"type":{"0":"Server Side"}},{"name":{"0":"JavaScript"},"type":{"0":"Client Side"}},{"name":{"0":"Asp"},"type":{"0":"Server Side"}}]'

As you can see, the value of each property in an object - while I need this:

'[{"name":"Php","type":"Server Side"},{"name":"JavaScript","type":"Client Side"},{"name":"Asp","type":"Server Side"}]'

What's wrong in my code?

What I have tried:

$xml = simplexml_load_string($xmlData);
foreach ($xml->language as $lang) {
$json[] = [
'name' => $lang->name,
'type' => $lang->type
];
}
var_export(json_encode($json));