Filter array by its keys using an array of allowed keys
The callback function in array_filter() only passes in the array’s values, not the keys. If I have: $my_array = array(“foo” => 1, “hello” => “world”); $allowed = array(“foo”, “bar”); What’s the best way to delete all keys in $my_array that are not in the $allowed array? Desired output: $my_array = array(“foo” => 1); 11 Answers … Read more
