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--TEST--
Test usort() function : basic functionality
--FILE--
<?php
/* Prototype : bool usort(array $array_arg, string $cmp_function)
* Description: Sort an array by values using a user-defined comparison function
* Source code: ext/standard/array.c
*/
/*
* Test basic functionality of usort() with indexed and associative arrays
*/
echo "*** Testing usort() : basic functionality ***\n";
function cmp($value1, $value2)
{
if($value1 == $value2) {
return 0;
}
else if($value1 > $value2) {
return 1;
}
else
return -1;
}
// Int array with default keys
$int_values = array(1, 8, 9, 3, 2, 6, 7);
echo "\n-- Numeric array with default keys --\n";
var_dump( usort($int_values, 'cmp') );
var_dump($int_values);
// String array with default keys
$string_values = array("This", "is", 'a', "test");
echo "\n-- String array with default keys --\n";
var_dump( usort($string_values, 'cmp') );
var_dump($string_values);
// Associative array with numeric keys
$numeric_key_arg = array(1=> 1, 2 => 2, 3 => 7, 5 => 4, 4 => 9);
echo "\n-- Associative array with numeric keys --\n";
var_dump( usort($numeric_key_arg, 'cmp') );
var_dump($numeric_key_arg);
// Associative array with string keys
$string_key_arg = array('one' => 4, 'two' => 2, 'three' => 1, 'four' => 10);
echo "\n-- Associative array with string keys --\n";
var_dump( usort($string_key_arg, 'cmp') );
var_dump($string_key_arg);
?>
===DONE===
--EXPECTF--
*** Testing usort() : basic functionality ***
-- Numeric array with default keys --
bool(true)
array(7) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(6)
[4]=>
int(7)
[5]=>
int(8)
[6]=>
int(9)
}
-- String array with default keys --
bool(true)
array(4) {
[0]=>
string(4) "This"
[1]=>
string(1) "a"
[2]=>
string(2) "is"
[3]=>
string(4) "test"
}
-- Associative array with numeric keys --
bool(true)
array(5) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
[3]=>
int(7)
[4]=>
int(9)
}
-- Associative array with string keys --
bool(true)
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
[3]=>
int(10)
}
===DONE===
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