PHP multidimensional array sorting

 /*
 function: Sort the two-dimensional array by the specified key value
 $array=array(
 0=>array('id'=>8,'username'=>'phpernote'),
 1=>array('id'=>9,'username'=>'com'),
 2=>array('id'=>5,'username'=>'www' )
 );

 Now we need to sort this two-dimensional array in ascending order by id, then:

 array_sort($array,'id','asc');

*/
 public function array_sort($array,$keys ,$type='asc'){
 if(!isset($array) || !is_array($array) || empty($array)){
 return '';
 }
 if(!isset($keys ) || trim($keys)==''){
 return '';
 }
 if(!isset($type) || $type=='' || !in_array(strtolower($type),array ('asc','desc'))){
 return '';
 }
 $keysvalue=array();
 foreach($array as $key=>$val){
 $val[$keys] = str_replace('-','',$val[$keys]);
 $val[$keys] = str_replace(' ','',$val[$keys]);
 $val[$keys] = str_replace (':','',$val[$keys]);
 $keysvalue[] =$val[$keys];
 }
 asort($keysvalue); //key value sorting
 reset($keysvalue); //Repoint the pointer to the first one in the array
 foreach($keysvalue as $key=>$vals) {
 $keysort[] = $key;
 }
 $keysvalue = array();
 $count=count($ keysort);
 if(strtolower($type) != 'asc'){
 for($i=$count-1; $i>=0; $i--) {
 $keysvalue[] = $array[ $keysort[$i]];
 }
 }else{
 for($i=0; $i<$count; $i++){
 $keysvalue[] = $array[$keysort[$i]];
 }
 }
 return $keysvalue;
 }

PHP