dynamic arrays

thislocation_arr = array();
$location = array('a', 'b', 'c');

for ($i = 0; $i < $rownum; $i++) {
//dynamically name a array
 $location.${$location} = array();
//add date values to this array
$location.${$location}[$i] = $somevalue;
//add dyanamic array value to the main associated array
$thislocation_arr[$location] = $location.${$location};
}