1--TEST--
2Test usort() function : usage variations - Anonymous comparison function
3--FILE--
4<?php
5/* Prototype  : bool usort(array $array_arg, string $cmp_function)
6 * Description: Sort an array by values using a user-defined comparison function
7 * Source code: ext/standard/array.c
8 */
9
10/*
11 * Pass an anonymous comparison function as $cmp_function argument to test behaviour()
12 */
13
14echo "*** Testing usort() : usage variation ***\n";
15
16$cmp_function = 'if($value1 == $value2) {return 0;} else if($value1 > $value2) {return 1;} else{return -1;}';
17
18$array_arg = array(0 => 100, 1 => 3, 2 => -70, 3 => 24, 4 => 90);
19
20echo "\n-- Anonymous 'cmp_function' with parameters passed by value --\n";
21var_dump( usort($array_arg, create_function('$value1, $value2',$cmp_function) ) );
22var_dump($array_arg);
23
24$array_arg = array("b" => "Banana", "m" => "Mango", "a" => "Apple", "p" => "Pineapple");
25
26echo "\n-- Anonymous 'cmp_function' with parameters passed by reference --\n";
27var_dump( usort($array_arg, create_function('&$value1, &$value2', $cmp_function) ) );
28var_dump($array_arg);
29?>
30===DONE===
31--EXPECTF--
32*** Testing usort() : usage variation ***
33
34-- Anonymous 'cmp_function' with parameters passed by value --
35bool(true)
36array(5) {
37  [0]=>
38  int(-70)
39  [1]=>
40  int(3)
41  [2]=>
42  int(24)
43  [3]=>
44  int(90)
45  [4]=>
46  int(100)
47}
48
49-- Anonymous 'cmp_function' with parameters passed by reference --
50bool(true)
51array(4) {
52  [0]=>
53  string(5) "Apple"
54  [1]=>
55  string(6) "Banana"
56  [2]=>
57  string(5) "Mango"
58  [3]=>
59  string(9) "Pineapple"
60}
61===DONE===