1--TEST--
2Test array_walk() function : basic functionality - associative array
3--FILE--
4<?php
5echo "*** Testing array_walk() : basic functionality ***\n";
6
7// associative array
8$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
9
10function test_alter(&$item, $key, $prefix)
11{
12  // dump the arguments to check that they are passed
13  // with proper type
14  var_dump($item); // value
15  var_dump($key);  // key
16  var_dump($prefix); // additional argument passed to callback function
17  echo "\n"; // new line to separate the output between each element
18}
19
20function test_print($item, $key)
21{
22  // dump the arguments to check that they are passed
23  // with proper type
24  var_dump($item); // value
25  var_dump($key);  // key
26  echo "\n"; // new line to separate the output between each element
27}
28
29echo "-- Using array_walk with default parameters to show array contents --\n";
30var_dump(array_walk($fruits, 'test_print'));
31
32echo "-- Using array_walk with one optional parameter to modify contents --\n";
33var_dump (array_walk($fruits, 'test_alter', 'fruit'));
34
35echo "-- Using array_walk with default parameters to show modified array contents --\n";
36var_dump (array_walk($fruits, 'test_print'));
37
38echo "Done";
39?>
40--EXPECT--
41*** Testing array_walk() : basic functionality ***
42-- Using array_walk with default parameters to show array contents --
43string(5) "lemon"
44string(1) "d"
45
46string(6) "orange"
47string(1) "a"
48
49string(6) "banana"
50string(1) "b"
51
52string(5) "apple"
53string(1) "c"
54
55bool(true)
56-- Using array_walk with one optional parameter to modify contents --
57string(5) "lemon"
58string(1) "d"
59string(5) "fruit"
60
61string(6) "orange"
62string(1) "a"
63string(5) "fruit"
64
65string(6) "banana"
66string(1) "b"
67string(5) "fruit"
68
69string(5) "apple"
70string(1) "c"
71string(5) "fruit"
72
73bool(true)
74-- Using array_walk with default parameters to show modified array contents --
75string(5) "lemon"
76string(1) "d"
77
78string(6) "orange"
79string(1) "a"
80
81string(6) "banana"
82string(1) "b"
83
84string(5) "apple"
85string(1) "c"
86
87bool(true)
88Done
89