1--TEST--
2Test usort() function : usage variations - numeric data
3--FILE--
4<?php
5/* Prototype  : bool usort(array $array_arg, string $cmp_function)
6 * Description: Sort an array by values using a user-defined comparison function
7 * Source code: ext/standard/array.c
8 */
9
10/*
11 * Pass arrays of numeric data to usort() to test how it is re-ordered
12 */
13
14echo "*** Testing usort() : usage variation ***\n";
15
16function cmp_function($value1, $value2)
17{
18  if($value1 == $value2) {
19    return 0;
20  }
21  else if($value1 > $value2) {
22    return 1;
23  }
24  else {
25    return -1;
26  }
27}
28
29// Int array
30$int_values = array(0 => 3,   1 => 2,   3 => 100,
31                    4 => 150, 5 => 25,  6 => 350,
32                    7 => 0,   8 => -3,  9 => -1200);
33
34echo "\n-- Sorting Integer array --\n";
35var_dump( usort($int_values, 'cmp_function') );
36var_dump($int_values);
37
38// Octal array
39$octal_values = array(0 => 056, 1 => 023,  2 => 00,
40                      3 => 015, 4 => -045, 5 => 01,  6 => -07);
41
42echo "\n-- Sorting Octal array --\n";
43var_dump( usort($octal_values, 'cmp_function') );
44var_dump($octal_values);
45
46// Hexadecimal array
47$hex_values = array(0 => 0xAE,  1 => 0x2B, 2 => 0X10,
48                    3 => -0xCF, 4 => 0X12, 5 => -0XF2);
49
50echo "\n-- Sorting Hex array --\n";
51var_dump( usort($hex_values, 'cmp_function') );
52var_dump($hex_values);
53
54// Float array
55$float_values = array( 0 => 10.2, 1 => 2.4, 2 => -3.4,
56                       3 => 0,    4 => 0.5, 5 => 7.3e3, 6 => -9.34E-2);
57
58echo "\n-- Sorting Float array --\n";
59var_dump( usort($float_values, 'cmp_function') );
60var_dump($float_values);
61
62// empty array
63$empty_array = array();
64
65echo "\n-- Sorting empty array --\n";
66var_dump( usort($empty_array, 'cmp_function') );
67var_dump($empty_array);
68?>
69===DONE===
70--EXPECTF--
71*** Testing usort() : usage variation ***
72
73-- Sorting Integer array --
74bool(true)
75array(9) {
76  [0]=>
77  int(-1200)
78  [1]=>
79  int(-3)
80  [2]=>
81  int(0)
82  [3]=>
83  int(2)
84  [4]=>
85  int(3)
86  [5]=>
87  int(25)
88  [6]=>
89  int(100)
90  [7]=>
91  int(150)
92  [8]=>
93  int(350)
94}
95
96-- Sorting Octal array --
97bool(true)
98array(7) {
99  [0]=>
100  int(-37)
101  [1]=>
102  int(-7)
103  [2]=>
104  int(0)
105  [3]=>
106  int(1)
107  [4]=>
108  int(13)
109  [5]=>
110  int(19)
111  [6]=>
112  int(46)
113}
114
115-- Sorting Hex array --
116bool(true)
117array(6) {
118  [0]=>
119  int(-242)
120  [1]=>
121  int(-207)
122  [2]=>
123  int(16)
124  [3]=>
125  int(18)
126  [4]=>
127  int(43)
128  [5]=>
129  int(174)
130}
131
132-- Sorting Float array --
133bool(true)
134array(7) {
135  [0]=>
136  float(-3.4)
137  [1]=>
138  float(-0.0934)
139  [2]=>
140  int(0)
141  [3]=>
142  float(0.5)
143  [4]=>
144  float(2.4)
145  [5]=>
146  float(10.2)
147  [6]=>
148  float(7300)
149}
150
151-- Sorting empty array --
152bool(true)
153array(0) {
154}
155===DONE===
156