Replace placeholders in array with values from other array

Question

I have 2 arrays one with placeholder that are keys in another array

arr1 = array(
    "id"       => "{{verticalId}}",
    "itemPath" => "{{verticalId}}/{{pathId}}/");

arr2 = array(
        "verticalId" => "value1",
        "pathId"     => "value2");

So how can I run on arr1 and replace placeholders with value from arr2 ?

Answer 1

foreach ($arr1 as $key => &$value) {
    $value = preg_replace_callback('/\{\{(.*?)\}\}/', function($match) use ($arr2) {
        return $arr2[$match[1]];
    }, $value);
}