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|
--TEST--
Test usort() function : usage variations - multi-dimensional arrays
--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 a multi-dimensional array as $array_arg argument to usort()
* to test how array is re-ordered
*/
echo "*** Testing usort() : usage variation ***\n";
function cmp_function($value1, $value2)
{
if($value1 == $value2) {
return 0;
}
else if($value1 > $value2) {
return 1;
}
else {
return -1;
}
}
$array_args = array(
0 => array(2, 10, -1),
1 => array(100),
2 => array(),
3 => array(0),
4 => array(-1),
5 => array(-9, 34, 54, 0, 20),
6 => array(''),
7 => array("apple", "Apple", "APPLE", "aPPle", "aPpLe")
);
$temp_array = $array_args;
echo "\n-- Pass usort() a two-dimensional array --\n";
// sorting array_arg as whole array
var_dump( usort($temp_array, 'cmp_function') );
echo "-- Array after call to usort() --\n";
var_dump($temp_array);
echo "\n-- Pass usort() a sub-array --\n";
var_dump( usort($array_args[5], 'cmp_function') );
echo "-- Array after call to usort() --\n";
var_dump($array_args[5]);
?>
===DONE===
--EXPECTF--
*** Testing usort() : usage variation ***
-- Pass usort() a two-dimensional array --
bool(true)
-- Array after call to usort() --
array(8) {
[0]=>
array(0) {
}
[1]=>
array(1) {
[0]=>
int(-1)
}
[2]=>
array(1) {
[0]=>
string(0) ""
}
[3]=>
array(1) {
[0]=>
int(0)
}
[4]=>
array(1) {
[0]=>
int(100)
}
[5]=>
array(3) {
[0]=>
int(2)
[1]=>
int(10)
[2]=>
int(-1)
}
[6]=>
array(5) {
[0]=>
int(-9)
[1]=>
int(34)
[2]=>
int(54)
[3]=>
int(0)
[4]=>
int(20)
}
[7]=>
array(5) {
[0]=>
string(5) "apple"
[1]=>
string(5) "Apple"
[2]=>
string(5) "APPLE"
[3]=>
string(5) "aPPle"
[4]=>
string(5) "aPpLe"
}
}
-- Pass usort() a sub-array --
bool(true)
-- Array after call to usort() --
array(5) {
[0]=>
int(-9)
[1]=>
int(0)
[2]=>
int(20)
[3]=>
int(34)
[4]=>
int(54)
}
===DONE===
|
