How to get array key from corresponding array value?

Question

You can easily get an array value by its key like so: $value = array[$key] but what if I have the value and I want its key. What\'s the best way to get it?

Answer 1

You can use the array_keys function for that.

Example:

$array = array("blue", "red", "green", "blue", "blue");
print_r(array_keys($array, "blue"));

This will get the key from the array for value blue