Php uksort
From w3cyberlearnings
Contents |
PHP function uksort
This function sorts array key by using a user-defined function.
Syntax uksort
- array: array input
- callback: user-defined function
uksort(array,callback);
callback return
- Return 0 when $a=$b
- Return 1 when $a>$b
- Return -1 when $a<$b
Note
The uksort function uses quicksort algorithm to sort.
Example 1
<?php
function sort2($v1, $v2) {
if ($v1 == $v2) {
return 0;
} else if ($v1 > $v2) {
return 1;
} else {
return -1;
}
}
$list = array(
'aa' => 'banana',
'ab' => 'cling',
'bb' => 'soon',
'a1' => 32,
'a9' => 31,
'dd' => 'apple'
);
uksort($list, "sort2");
print_r($list);
?>
Output
Array
(
[a1] => 32
[a9] => 31
[aa] => banana
[ab] => cling
[bb] => soon
[dd] => apple
)
Example 2
<?php
function sort2($v1, $v2) {
if ($v1 == $v2) {
return 0;
} else if ($v1 > $v2) {
return 1;
} else {
return -1;
}
}
$score = array(
30 => 'apple',
20 => 'king',
1 => 'yes',
3 => 'no',
10 => 'mother',
3 => 'father');
uksort($score, "sort2");
print_r($score);
?>
Output
Array
(
[1] => yes
[3] => father
[10] => mother
[20] => king
[30] => apple
)
Related Links
- array_change_key_case
- array_chunk
- array_combine
- array_count_values
- array_diff_assoc
- array_diff_key
- array_diff_uassoc
- array_diff_ukey
- array_diff
- array_fill_keys
- array_fill
- array_filter
- array_flip
- array_intersect_assoc
- array_intersect_key
- array_intersect_uassoc
- array_intersect_ukey
- array_intersect
- array_key_ exists
- array_keys
