Remove specific properties easily

remove-spezefic-property.php

<?php

$raw = json_decode(file_get_contents('map.geojson'));

$output = new stdclass;
$output->type = "FeatureCollection";
$output->features = array();

foreach($raw->features as $item) {

	$item->properties->id = 0;

	$new = new stdclass;
	$new->properties = $item->properties;
	$new->type = "Feature";
	$new->geometry = $item->geometry;
	$output->features[] = $new;
}
file_put_contents('without-spezefic-property.geojson', json_encode($output));

?>