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|
--TEST--
Test uasort() function : usage variations - sort array with reference variables
--FILE--
<?php
/* Prototype : bool uasort(array $array_arg, string $cmp_function)
* Description: Sort an array with a user-defined comparison function and maintain index association
* Source code: ext/standard/array.c
*/
/*
* Testing uasort() with 'array_arg' containing different reference variables
*/
// comparison function
/* Prototype : int cmp_function(mixed $value1, mixed $value2)
* Parameters : $value1 and $value2 - values to be compared
* Return value : 0 - if both values are same
* 1 - if value1 is greater than value2
* -1 - if value1 is less than value2
* Description : compares value1 and value2
*/
function cmp_function($value1, $value2)
{
if($value1 == $value2) {
return 0;
}
else if($value1 > $value2) {
return 1;
}
else {
return -1;
}
}
echo "*** Testing uasort() : 'array_arg' with elements as reference ***\n";
// different variables which are used as elements of 'array_arg'
$value1 = -5;
$value2 = 100;
$value3 = 0;
$value4 = &$value1;
// array_args an array containing elements with reference variables
$array_arg = array(
0 => 10,
1 => &$value4,
2 => &$value2,
3 => 200,
4 => &$value3,
);
echo "-- Sorting 'array_arg' containing different references --\n";
var_dump( uasort($array_arg, 'cmp_function') ); // expecting: bool(true)
var_dump($array_arg);
echo "Done"
?>
--EXPECTF--
*** Testing uasort() : 'array_arg' with elements as reference ***
-- Sorting 'array_arg' containing different references --
bool(true)
array(5) {
[1]=>
&int(-5)
[4]=>
&int(0)
[0]=>
int(10)
[2]=>
&int(100)
[3]=>
int(200)
}
Done
|
