1--TEST--
2Test usort() function : error conditions - Pass unknown 'cmp_function'
3--FILE--
4<?php
5/* Prototype  : bool usort(array $array_arg, string $cmp_function)
6 * Description: Sort an array by values using a user-defined comparison function
7 * Source code: ext/standard/array.c
8 */
9
10/*
11 * Pass an unknown comparison function to usort() to test behaviour.
12 * Pass incorrect number of arguments and an unknown function to test which error
13 * is generated.
14 */
15
16echo "*** Testing usort() : error conditions ***\n";
17
18function cmp($value1, $value2)
19{
20  if($value1 == $value2) {
21    return 0;
22  }
23  else if($value1 > $value2) {
24    return 1;
25  }
26  else {
27    return -1;
28  }
29}
30
31// Initialize 'array_arg'
32$array_arg = array(0 => 1, 1 => 10, 2 => 'string', 3 => 3, 4 => 2, 5 => 100, 6 => 25);
33$extra_arg = 10;
34
35// With non existent comparison function
36echo "\n-- Testing usort() function with non-existent compare function --\n";
37var_dump( usort($array_arg, 'non_existent') );
38
39// With non existent comparison function and extra argument
40echo "\n-- Testing usort() function with non-existent compare function and extra argument --\n";
41var_dump( usort($array_arg, 'non_existent', $extra_arg) );
42?>
43===DONE===
44--EXPECTF--
45*** Testing usort() : error conditions ***
46
47-- Testing usort() function with non-existent compare function --
48
49Warning: usort() expects parameter 2 to be a valid callback, function 'non_existent' not found or invalid function name in %s on line %d
50NULL
51
52-- Testing usort() function with non-existent compare function and extra argument --
53
54Warning: usort() expects exactly 2 parameters, 3 given in %s on line %d
55NULL
56===DONE===
57