Nested array (short syntax)
$data['markerIcons'] = [
0 => [
"type" => "where-to-stay",
"image" => get_template_directory_uri() . "/assets/img/svg/places-to-stay-map.svg"
],
1 => [
"type" => "food-and-drink",
"image" => get_template_directory_uri() . "/assets/img/svg/food-and-drink-icon.svg"
],
2 => [
"type" => "whats-on",
"image" => get_template_directory_uri() . "/assets/img/svg/whats-on-map.svg"
],
3 => [
"type" => "picnic",
"image" => get_template_directory_uri() . "/assets/img/svg/picnic-map.svg"
],
4 => [
"type" => "shopping",
"image" => get_template_directory_uri() . "/assets/img/svg/shopping-map.svg"
],
5 => [
"type" => "food-and-drink",
"image" => get_template_directory_uri() . "/assets/img/svg/food-map.svg"
],
6 => [
"type" => "parking",
"image" => get_template_directory_uri() . "/assets/img/svg/parking-map.svg"
]
];
```