PHP array sort, one-dimensional arrays, two-dimensional array sorting

One-dimensional array sorting

1. sort, rsort sorting (r (reverse flip represented, ie in descending order)), by the sorting key.

<? PHP
 $ ARR = Array (10,2,4,1,5,8,7,9 );
 // equivalent to $ arr = array ( '0' => 10, '1' => 2, ' 2 '=> 4,' 3 '=> 1,' 4 '=> 5' 5 '=> 8,' 6 '=> 7,' 7 '=> 9); 
// default sort key value ascending order, the key names are re-specified, for example 10 original key name is 0, now. 7 
Sort ( $ ARR ); 
 
var_dump ( $ ARR ); 
 
/ * Array (size =. 8) 
  0 => int. 1 
  . 1 => int 2 
  2 => int. 4 
  . 3 => int. 5 
  . 4 => int. 7 
  . 5 => int. 8 
  . 6 => int. 9 
  . 7 => 10 int 
 * / 
?>

? < PHP
 $ arr = Array (10,2,4,1,5,8,7,9 ); 
 
// default sort key values in descending order, were the keys from the new provisions, ibid 
rsort ( $ arr ); 
 
var_dump ( $ ARR ); 
 
/ * Array (size =. 8) 
  0 => int 10 
  . 1 => int. 9 
  2 => int. 8 
  . 3 => int. 7 
  . 4 => int. 5 
  . 5 => int. 4 
  . 6 => int 2 
  . 7 = > int 1 
 * / 
?>

2. ksort, krsort sorting, sorting by key name.

? < PHP
 $ ARR = Array (10,2,4,1,5,8,7,9 ); 
 
// key keys in ascending order 
ksort ( $ ARR ); 
 
var_dump ( $ ARR ); 
 
/ * Array (size = . 8) 
  0 => 10 int 
  . 1 => 2 int 
  2 => int. 4 
  . 3 => int. 1 
  . 4 => int. 5 
  . 5 => int. 8 
  . 6 => int. 7 
  . 7 => int. 9 * / 
?>

? < PHP
 $ arr = Array (10,2,4,1,5,8,7,9 ); 
 
// button key name in descending order 
krsort ( $ arr ); 
 
var_dump ( $ arr ); 
 
/ * Array (size = . 8) 
  . 7 => int. 9 
  . 6 => int. 7 
  . 5 => int. 8 
  . 4 => int. 5 
  . 3 => int. 1 
  2 => int. 4 
  . 1 => 2 int 
  0 => 10 int * / 
?>

3. asort, arsort sorting, sorting by keys.

? < PHP
 $ arr = Array (10,2,4,1,5,8,7,9 ); 
 
// button keys in ascending order, and sort different is that keys will not redefine 
asort ( $ arr ) ; 
 
var_dump ( $ ARR ); 
 
/ * Array (size =. 8) 
  . 3 => int. 1 
  . 1 => int 2 
  2 => int. 4 
  . 4 => int. 5 
  . 6 => int. 7 
  . 5 => int. 8 
  . 7 => int. 9 
  = 0> 10 int * / 
?>

? < PHP
 $ arr = Array (10,2,4,1,5,8,7,9 ); 
 
// button keys in descending order, and rsort different is that keys will not redefine 
arsort ( $ arr ) ; 
 
var_dump ( $ ARR ); 
 
/ * Array (size =. 8) 
  0 => int 10 
  . 7 => int. 9 
  . 5 => int. 8 
  . 6 => int. 7 
  . 4 => int. 5 
  2 => int. 4 
  . 1 => int 2 
  = 3> 1 int * / 
?>

Two-dimensional array is sorted according to a key

//二维数组排序
function sortArr($arrays,$sort_key,$sort_order=SORT_ASC,$sort_type=SORT_NUMERIC ){
    $key_arrays =array();
    if(is_array($arrays)){
        foreach ($arrays as $array){
            if(is_array($array)){
                $key_arrays[] = $array[$sort_key];
            }else{
                 Return  to false ; 
            } 
        } 
    } the else {
         return  to false ; 
    } 
    array_multisort ( $ key_arrays , $ the sort_order , $ SORT_TYPE , $ Arrays );
     return  $ Arrays ; 
} 

// $ Data represent two-dimensional array, for example, read from the data structure multi-line table structure, 'date' field in each row represents a inside, this field by sorting 
// SORT_DESC expressed in descending order, provided a comparative SORT_STRING 'date' field as a character string for 
$ newData = $ the this -> sortArr ( $ Data , 'DATE', SORT_DESC, SORT_STRING);

Two-dimensional array sorted by multiple keys

//二维数组多键值排序
function my_sort($arrays,$sort_key,$sort_key1,$sort_order=SORT_ASC,$sort_order1=SORT_DESC){
    $key_arrays = $key_arrays1 = array();
    if(is_array($arrays)){
        foreach ($arrays as $array){
            if(is_array($array)){
                $key_arrays[] = $array[$ sort_key ];
                 $ key_arrays1 [] = $ Array [ $ sort_key1 ]; 
            } the else {
                 return  to false ; 
            } 
        } 
    } the else {
         return  to false ; 
    } 
    array_multisort ( $ key_arrays , $ the sort_order , $ key_arrays1 , $ sort_order1 , $ Arrays );
     return  Arrays $ ; 
} 

//  $ data represent two-dimensional array, for example, read from the data structure of a multi-row table structure
// 'DATE' represents a field of each line inside of sorting through this field, and then by 'time' field ordering
// SORT_DESC, SORT_ASC corresponding 'date', sort 'time' two fields 
// effects similar database order by data desc, time asc. 
newData $ = $ the this -> sortArr ( $ Data , 'DATE', 'Time', SORT_DESC, SORT_ASC);

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