1--TEST--
2Test usort() function : usage variations - Pass different data types as $array_arg arg
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 different data types as $array_arg argument to usort() to test behaviour
12 */
13
14echo "*** Testing usort() : usage variations ***\n";
15
16// Initialise function arguments not being substituted
17function cmp_function($value1, $value2)
18{
19  if($value1 == $value2) {
20    return 0;
21  }
22  else if($value1 > $value2) {
23    return 1;
24  }
25  else {
26    return -1;
27  }
28}
29
30//get an unset variable
31$unset_var = 10;
32unset ($unset_var);
33
34// get a class
35class classA
36{
37  public function __toString() {
38    return "Class A object";
39  }
40}
41
42// heredoc string
43$heredoc = <<<EOT
44hello world
45EOT;
46
47// get a resource variable
48$fp = fopen(__FILE__, "r");
49
50// unexpected values to be passed to $array_arg argument
51$inputs = array(
52
53       // int data
54/*1*/  0,
55       1,
56       12345,
57       -2345,
58
59       // float data
60/*5*/  10.5,
61       -10.5,
62       12.3456789000e10,
63       12.3456789000E-10,
64       .5,
65
66       // null data
67/*10*/ NULL,
68       null,
69
70       // boolean data
71/*12*/ true,
72       false,
73       TRUE,
74       FALSE,
75
76       // empty data
77/*16*/ "",
78       '',
79       array(),
80
81       // string data
82/*19*/ "string",
83       'string',
84       $heredoc,
85
86       // object data
87/*22*/ new classA(),
88
89       // undefined data
90/*23*/ @$undefined_var,
91
92       // unset data
93/*24*/ @$unset_var,
94
95       // resource variable
96/*25*/ $fp
97);
98
99// loop through each element of $inputs to check the behavior of usort()
100$iterator = 1;
101foreach($inputs as $input) {
102  echo "\n-- Iteration $iterator --\n";
103  var_dump( usort($input, 'cmp_function') );
104  $iterator++;
105};
106
107//closing resource
108fclose($fp);
109?>
110===DONE===
111--EXPECTF--
112*** Testing usort() : usage variations ***
113
114-- Iteration 1 --
115
116Warning: usort() expects parameter 1 to be array, integer given in %s on line %d
117NULL
118
119-- Iteration 2 --
120
121Warning: usort() expects parameter 1 to be array, integer given in %s on line %d
122NULL
123
124-- Iteration 3 --
125
126Warning: usort() expects parameter 1 to be array, integer given in %s on line %d
127NULL
128
129-- Iteration 4 --
130
131Warning: usort() expects parameter 1 to be array, integer given in %s on line %d
132NULL
133
134-- Iteration 5 --
135
136Warning: usort() expects parameter 1 to be array, double given in %s on line %d
137NULL
138
139-- Iteration 6 --
140
141Warning: usort() expects parameter 1 to be array, double given in %s on line %d
142NULL
143
144-- Iteration 7 --
145
146Warning: usort() expects parameter 1 to be array, double given in %s on line %d
147NULL
148
149-- Iteration 8 --
150
151Warning: usort() expects parameter 1 to be array, double given in %s on line %d
152NULL
153
154-- Iteration 9 --
155
156Warning: usort() expects parameter 1 to be array, double given in %s on line %d
157NULL
158
159-- Iteration 10 --
160
161Warning: usort() expects parameter 1 to be array, null given in %s on line %d
162NULL
163
164-- Iteration 11 --
165
166Warning: usort() expects parameter 1 to be array, null given in %s on line %d
167NULL
168
169-- Iteration 12 --
170
171Warning: usort() expects parameter 1 to be array, boolean given in %s on line %d
172NULL
173
174-- Iteration 13 --
175
176Warning: usort() expects parameter 1 to be array, boolean given in %s on line %d
177NULL
178
179-- Iteration 14 --
180
181Warning: usort() expects parameter 1 to be array, boolean given in %s on line %d
182NULL
183
184-- Iteration 15 --
185
186Warning: usort() expects parameter 1 to be array, boolean given in %s on line %d
187NULL
188
189-- Iteration 16 --
190
191Warning: usort() expects parameter 1 to be array, string given in %s on line %d
192NULL
193
194-- Iteration 17 --
195
196Warning: usort() expects parameter 1 to be array, string given in %s on line %d
197NULL
198
199-- Iteration 18 --
200bool(true)
201
202-- Iteration 19 --
203
204Warning: usort() expects parameter 1 to be array, string given in %s on line %d
205NULL
206
207-- Iteration 20 --
208
209Warning: usort() expects parameter 1 to be array, string given in %s on line %d
210NULL
211
212-- Iteration 21 --
213
214Warning: usort() expects parameter 1 to be array, string given in %s on line %d
215NULL
216
217-- Iteration 22 --
218
219Warning: usort() expects parameter 1 to be array, object given in %s on line %d
220NULL
221
222-- Iteration 23 --
223
224Warning: usort() expects parameter 1 to be array, null given in %s on line %d
225NULL
226
227-- Iteration 24 --
228
229Warning: usort() expects parameter 1 to be array, null given in %s on line %d
230NULL
231
232-- Iteration 25 --
233
234Warning: usort() expects parameter 1 to be array, resource given in %s on line %d
235NULL
236===DONE===