1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
--TEST--
Test array_filter() function : usage variations - built-in functions as 'callback' argument
--FILE--
<?php
/* Prototype : array array_filter(array $input [, callback $callback])
* Description: Filters elements from the array via the callback.
* Source code: ext/standard/array.c
*/
/*
* Passing built-in functions and different language constructs as 'callback' argument
*/
echo "*** Testing array_filter() : usage variations - built-in functions as 'callback' argument ***\n";
$input = array(0, 1, -1, 10, 100, 1000, 'Hello', null);
// using built-in function 'is_int' as 'callback'
var_dump( array_filter($input, 'is_int') );
// using built-in function 'chr' as 'callback'
var_dump( array_filter($input, 'chr') );
// using language construct 'echo' as 'callback'
var_dump( array_filter($input, 'echo') );
// using language construct 'exit' as 'callback'
var_dump( array_filter($input, 'exit') );
echo "Done"
?>
--EXPECTF--
*** Testing array_filter() : usage variations - built-in functions as 'callback' argument ***
array(6) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
}
array(8) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
}
Warning: array_filter() expects parameter 2 to be a valid callback, function 'echo' not found or invalid function name in %s on line %d
NULL
Warning: array_filter() expects parameter 2 to be a valid callback, function 'exit' not found or invalid function name in %s on line %d
NULL
Done
|
