$areasexperiencia = $areasexperiencia;
function unique_key($array,$keyname){
$new_array = array();
foreach($array as $key=>$value){

if(!isset($new_array[$value[$keyname]])){
$new_array[$value[$keyname]] = $value;
}

}
$new_array = array_values($new_array);
return $new_array;
}
$unique_arr = unique_key($areasexperiencia,'nombre');