1--TEST--
2Test key() function : usage variations - Pass different data types as $array_arg arg.
3--FILE--
4<?php
5/* Prototype  : mixed key(array $array_arg)
6 * Description: Return the key of the element currently pointed to by the internal array pointer
7 * Source code: ext/standard/array.c
8 */
9
10/*
11 * Pass different data types as $array_arg argument to test behaviour of key()
12 */
13
14echo "*** Testing key() : usage variations ***\n";
15
16//get an unset variable
17$unset_var = 10;
18unset ($unset_var);
19
20// get a class
21class classA
22{
23	var $var1;
24  public function __toString() {
25    return "Class A object";
26  }
27}
28
29// heredoc string
30$heredoc = <<<EOT
31hello world
32EOT;
33
34// get a resource variable
35$fp = fopen(__FILE__, "r");
36
37// unexpected values to be passed to $array_arg argument
38$inputs = array(
39
40       // int data
41/*1*/  0,
42       1,
43       12345,
44       -2345,
45
46       // float data
47/*5*/  10.5,
48       -10.5,
49       12.3456789000e10,
50       12.3456789000E-10,
51       .5,
52
53       // null data
54/*10*/ NULL,
55       null,
56
57       // boolean data
58/*12*/ true,
59       false,
60       TRUE,
61       FALSE,
62
63       // empty data
64/*16*/ "",
65       '',
66       array(),
67
68       // string data
69/*19*/ "string",
70       'string',
71       $heredoc,
72
73       // object data
74/*22*/ new classA(),
75
76       // undefined data
77/*23*/ @$undefined_var,
78
79       // unset data
80/*24*/ @$unset_var,
81
82       // resource variable
83/*25*/ $fp
84);
85
86// loop through each element of $inputs to check the behavior of key()
87$iterator = 1;
88foreach($inputs as $input) {
89  echo "\n-- Iteration $iterator --\n";
90  var_dump( key($input) );
91  $iterator++;
92};
93
94fclose($fp);
95?>
96===DONE===
97--EXPECTF--
98*** Testing key() : usage variations ***
99
100-- Iteration 1 --
101
102Warning: key() expects parameter 1 to be array, int given in %s on line %d
103NULL
104
105-- Iteration 2 --
106
107Warning: key() expects parameter 1 to be array, int given in %s on line %d
108NULL
109
110-- Iteration 3 --
111
112Warning: key() expects parameter 1 to be array, int given in %s on line %d
113NULL
114
115-- Iteration 4 --
116
117Warning: key() expects parameter 1 to be array, int given in %s on line %d
118NULL
119
120-- Iteration 5 --
121
122Warning: key() expects parameter 1 to be array, float given in %s on line %d
123NULL
124
125-- Iteration 6 --
126
127Warning: key() expects parameter 1 to be array, float given in %s on line %d
128NULL
129
130-- Iteration 7 --
131
132Warning: key() expects parameter 1 to be array, float given in %s on line %d
133NULL
134
135-- Iteration 8 --
136
137Warning: key() expects parameter 1 to be array, float given in %s on line %d
138NULL
139
140-- Iteration 9 --
141
142Warning: key() expects parameter 1 to be array, float given in %s on line %d
143NULL
144
145-- Iteration 10 --
146
147Warning: key() expects parameter 1 to be array, null given in %s on line %d
148NULL
149
150-- Iteration 11 --
151
152Warning: key() expects parameter 1 to be array, null given in %s on line %d
153NULL
154
155-- Iteration 12 --
156
157Warning: key() expects parameter 1 to be array, bool given in %s on line %d
158NULL
159
160-- Iteration 13 --
161
162Warning: key() expects parameter 1 to be array, bool given in %s on line %d
163NULL
164
165-- Iteration 14 --
166
167Warning: key() expects parameter 1 to be array, bool given in %s on line %d
168NULL
169
170-- Iteration 15 --
171
172Warning: key() expects parameter 1 to be array, bool given in %s on line %d
173NULL
174
175-- Iteration 16 --
176
177Warning: key() expects parameter 1 to be array, string given in %s on line %d
178NULL
179
180-- Iteration 17 --
181
182Warning: key() expects parameter 1 to be array, string given in %s on line %d
183NULL
184
185-- Iteration 18 --
186NULL
187
188-- Iteration 19 --
189
190Warning: key() expects parameter 1 to be array, string given in %s on line %d
191NULL
192
193-- Iteration 20 --
194
195Warning: key() expects parameter 1 to be array, string given in %s on line %d
196NULL
197
198-- Iteration 21 --
199
200Warning: key() expects parameter 1 to be array, string given in %s on line %d
201NULL
202
203-- Iteration 22 --
204string(4) "var1"
205
206-- Iteration 23 --
207
208Warning: key() expects parameter 1 to be array, null given in %s on line %d
209NULL
210
211-- Iteration 24 --
212
213Warning: key() expects parameter 1 to be array, null given in %s on line %d
214NULL
215
216-- Iteration 25 --
217
218Warning: key() expects parameter 1 to be array, resource given in %s on line %d
219NULL
220===DONE===
221