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|
--TEST--
Test uasort() function : usage variations - 'cmp_function' with reference argument
--FILE--
<?php
/* Prototype : bool uasort(array $array_arg, string $cmp_function)
* Description: Sort an array with a user-defined comparison function and maintain index association
* Source code: ext/standard/array.c
*/
/* Testing uasort() functionality with comparison function having arguments as reference
*/
echo "*** Testing uasort() : 'cmp_function' with reference arguments ***\n";
// comparison function
/* Prototype : int cmp(mixed &$value1, mixed &$value2)
* Parameters : $value1 and $value2 - values received by reference
* Return value : 0 - if both values are same
* 1 - if value1 is greater than value2
* -1 - if value1 is less than value2
* Description : compares value1 and value2
*/
function cmp(&$value1, &$value2)
{
if($value1 == $value2) {
return 0;
}
else if($value1 > $value2) {
return 1;
}
else
return -1;
}
// Int array with default keys
$int_values = array(1, 8, 9, 3, 2, 6, 7);
echo "-- Passing integer values to 'cmp_function' --\n";
var_dump( uasort($int_values, 'cmp') );
var_dump($int_values);
// String array with default keys
$string_values = array("Mango", "Apple", "Orange", "Banana");
echo "-- Passing string values to 'cmp_function' --\n";
var_dump( uasort($string_values, 'cmp') );
var_dump($string_values);
echo "Done"
?>
--EXPECTF--
*** Testing uasort() : 'cmp_function' with reference arguments ***
-- Passing integer values to 'cmp_function' --
bool(true)
array(7) {
[0]=>
int(1)
[4]=>
int(2)
[3]=>
int(3)
[5]=>
int(6)
[6]=>
int(7)
[1]=>
int(8)
[2]=>
int(9)
}
-- Passing string values to 'cmp_function' --
bool(true)
array(4) {
[1]=>
string(5) "Apple"
[3]=>
string(6) "Banana"
[0]=>
string(5) "Mango"
[2]=>
string(6) "Orange"
}
Done
|
