angularjs ng-value和value

<select name="test1" ng-model="test11" ng-init="test11=0">
     <option value="MULTIMETER" ng-value="60"></option>
</select>

When I get the value from PHP: $test = $_POST['test1'];, it gives the value 60 (ng-value=0). I want to get the value 'MULTIMETER'. How can I solve this problem ?

case 1 : in test11 model value is 60 when select MULTIMETER

<select name="test1" ng-model="test11" ng-init="test11=0">
             <option ng-value="60">MULTIMETER</option>
           </select>

case 2 : in test11 model value is MULTIMETER when select 60

<select name="test1" ng-model="test11" ng-init="test11=0">
             <option ng-value="MULTIMETER">60</option>
           </select>

case 3 : in test11 model value is MULTIMETER when select 60 default selected

<select name="test1" ng-model="test11" ng-init="test11=0">
             <option ng-selected="true" ng-value="MULTIMETER">60</option>
           </select>

case 4 : Try it

<select name="test1" ng-model="test11">
             <option ng-selected="true" ng-value="MULTIMETER">MULTIMETER</option>
           </select>