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--TEST--
Test usort() function : usage variations - numeric data
--FILE--
<?php
/*
* Pass arrays of numeric data to usort() to test how it 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;
}
}
// Int array
$int_values = array(0 => 3, 1 => 2, 3 => 100,
4 => 150, 5 => 25, 6 => 350,
7 => 0, 8 => -3, 9 => -1200);
echo "\n-- Sorting Integer array --\n";
var_dump( usort($int_values, 'cmp_function') );
var_dump($int_values);
// Octal array
$octal_values = array(0 => 056, 1 => 023, 2 => 00,
3 => 015, 4 => -045, 5 => 01, 6 => -07);
echo "\n-- Sorting Octal array --\n";
var_dump( usort($octal_values, 'cmp_function') );
var_dump($octal_values);
// Hexadecimal array
$hex_values = array(0 => 0xAE, 1 => 0x2B, 2 => 0X10,
3 => -0xCF, 4 => 0X12, 5 => -0XF2);
echo "\n-- Sorting Hex array --\n";
var_dump( usort($hex_values, 'cmp_function') );
var_dump($hex_values);
// Float array
$float_values = array( 0 => 10.2, 1 => 2.4, 2 => -3.4,
3 => 0, 4 => 0.5, 5 => 7.3e3, 6 => -9.34E-2);
echo "\n-- Sorting Float array --\n";
var_dump( usort($float_values, 'cmp_function') );
var_dump($float_values);
// empty array
$empty_array = array();
echo "\n-- Sorting empty array --\n";
var_dump( usort($empty_array, 'cmp_function') );
var_dump($empty_array);
?>
--EXPECT--
*** Testing usort() : usage variation ***
-- Sorting Integer array --
bool(true)
array(9) {
[0]=>
int(-1200)
[1]=>
int(-3)
[2]=>
int(0)
[3]=>
int(2)
[4]=>
int(3)
[5]=>
int(25)
[6]=>
int(100)
[7]=>
int(150)
[8]=>
int(350)
}
-- Sorting Octal array --
bool(true)
array(7) {
[0]=>
int(-37)
[1]=>
int(-7)
[2]=>
int(0)
[3]=>
int(1)
[4]=>
int(13)
[5]=>
int(19)
[6]=>
int(46)
}
-- Sorting Hex array --
bool(true)
array(6) {
[0]=>
int(-242)
[1]=>
int(-207)
[2]=>
int(16)
[3]=>
int(18)
[4]=>
int(43)
[5]=>
int(174)
}
-- Sorting Float array --
bool(true)
array(7) {
[0]=>
float(-3.4)
[1]=>
float(-0.0934)
[2]=>
int(0)
[3]=>
float(0.5)
[4]=>
float(2.4)
[5]=>
float(10.2)
[6]=>
float(7300)
}
-- Sorting empty array --
bool(true)
array(0) {
}
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