How to allow duplicate keys in php array [duplicate]

Question

How to allow php array to have duplicate keys? When I try to insert a key, value pair with already existing key it overwrites the value of corresponding previous key with the new value. Is there a way that I could maintain both duplicate keys having different values?

Answer 1

You could have a single key that has a value of an array(aka a multi-dimensional array), which would contain all the elements with that given key. An example might be

$countries = array(   "United States" => array("California", "Texas"),   "Canada" => array("Ontario", "Quebec") ); 

Answer 2

$array[$key][] = $value; 

You then access it via:

echo $array[$key][0]; echo $array[$key][1]; 

Etc.

Note you are creating an array of arrays using this method.