JSON TO KML

convert.php

<?php

include('php-kml/lib/kml.php');

$jsonFile = file_get_contents("data.json");
$json_a = json_decode($jsonFile, true);

$a = new kml_Document();
$a->set_id('uid000000111');

foreach ($json_a as $poi) {
    $myPlacemark = new kml_Placemark($poi['title']);
    $myPlacemark->set_description($poi['html']);
    $myPlacemark->set_Geometry(new kml_Point($poi['longitude'], $poi['latitude']));
    $a->add_Feature($myPlacemark);
}

$a->dump(false);

data.json

[
    {
        "latitude": "48.86491238118212",
        "longitude": "2.3293590545654297",
        "title": "My title",
        "html": "Description"
    }
]