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--TEST--
Test usort() function : usage variations - duplicate keys and values
--FILE--
<?php
/* Prototype : bool usort(array $array_arg, string $cmp_function)
* Description: Sort an array by values using a user-defined comparison function
* Source code: ext/standard/array.c
*/
/*
* Pass an array with duplicate keys and values to usort() to test behaviour
*/
echo "*** Testing usort() : usage variation ***\n";
function cmp($value1, $value2)
{
if($value1 == $value2) {
return 0;
}
else if($value1 > $value2) {
return 1;
}
else
return -1;
}
// Array with duplicate string and integer keys and values
$array_arg = array(0 => 2, "a" => 8, "d" => 9,
3 => 3, 5 => 2, "o" => 6,
"z" => -99, 0 => 1, "z" => 3);
echo "\n-- Array with duplicate keys --\n";
var_dump( usort($array_arg, 'cmp') );
var_dump($array_arg);
// Array with default and assigned keys
$array_arg = array(0 => "Banana", 1 => "Mango", "Orange", 2 => "Apple", "Pineapple");
echo "\n-- Array with default/assigned keys --\n";
var_dump( usort($array_arg, 'cmp') );
var_dump($array_arg);
?>
===DONE===
--EXPECTF--
*** Testing usort() : usage variation ***
-- Array with duplicate keys --
bool(true)
array(7) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(3)
[4]=>
int(6)
[5]=>
int(8)
[6]=>
int(9)
}
-- Array with default/assigned keys --
bool(true)
array(4) {
[0]=>
string(5) "Apple"
[1]=>
string(6) "Banana"
[2]=>
string(5) "Mango"
[3]=>
string(9) "Pineapple"
}
===DONE===
|
