1--TEST--
2Test uasort() function : usage variations - different associative arrays
3--FILE--
4<?php
5/* Prototype  : bool uasort(array $array_arg, string $cmp_function)
6 * Description: Sort an array with a user-defined comparison function and maintain index association
7 * Source code: ext/standard/array.c
8*/
9
10/* Testing uasort() with different associative arrays having keys as
11 *   string, integer, default & duplicate keys
12 */
13
14echo "*** Testing uasort() : sorting different associative arrays ***\n";
15
16// comparison function
17/* Prototype : int cmp(mixed $value1, mixed $value2)
18 * Parameters : $value1 and $value2 - values to be compared
19 * Return value : 0 - if both values are same
20 *                1 - if value1 is greater than value2
21 *               -1 - if value1 is less than value2
22 * Description : compares value1 and value2
23 */
24function cmp($value1, $value2)
25{
26  if($value1 == $value2) {
27    return 0;
28  }
29  else if($value1 > $value2) {
30    return 1;
31  }
32  else
33    return -1;
34}
35
36// Array with duplicate string and integer keys
37$array_arg = array(0 => 2, "a" => 8, "d" => 9, 3 => 3, 5 => 2, "o" => 6, "z" => -99, 0 => 1, "z" => 3);
38echo "-- Array with duplicate keys --\n";
39var_dump( uasort($array_arg, 'cmp') );
40var_dump($array_arg);
41
42// Array with default and assigned keys
43$array_arg = array(0 => "Banana", 1 => "Mango", "Orange", 2 => "Apple", "Pineapple");
44echo "-- Array with default/assigned keys --\n";
45var_dump( uasort($array_arg, 'cmp') );
46var_dump($array_arg);
47
48echo "Done"
49?>
50--EXPECTF--
51*** Testing uasort() : sorting different associative arrays ***
52-- Array with duplicate keys --
53bool(true)
54array(7) {
55  [0]=>
56  int(1)
57  [5]=>
58  int(2)
59  [3]=>
60  int(3)
61  ["z"]=>
62  int(3)
63  ["o"]=>
64  int(6)
65  ["a"]=>
66  int(8)
67  ["d"]=>
68  int(9)
69}
70-- Array with default/assigned keys --
71bool(true)
72array(4) {
73  [2]=>
74  string(5) "Apple"
75  [0]=>
76  string(6) "Banana"
77  [1]=>
78  string(5) "Mango"
79  [3]=>
80  string(9) "Pineapple"
81}
82Done
83