Is it possible to have named index in an array ?

Hello everyone.

Today, I use a basic array like that :

tempArray[0] = 'value1';

tempArray[1] = 'value2';

tempArray[2] = 'value3';

etc...

i'd like to do something like that :

newArray['MyIndex1'] = 'value of my index 1';

newArray['MyIndex2'] = 'value of my index 2';

newArray['MyIndex3'] = 'value of my index 3';

When I do that, my newArray is always empty.

Is it possible to manage that and use named index ?