ksort

Sort an array by key

Syntax

ksort ( array &$array [, int $sort_flags = SORT_REGULAR ] ) : bool

Parameters

array

The input array.

sort_flags

Modify the sorting behavior.

SORT_REGULAR compare items normally; the details are described in the comparison operators section
SORT_NUMERIC compare items numerically
SORT_STRING compare items as strings
SORT_LOCALE_STRING compare items as strings, based on the current locale. It uses the locale, which can be changed using setlocale()
SORT_NATURAL compare items as strings using "natural ordering" like natsort()
SORT_FLAG_CASE can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings case-insensitively

Return

Returns TRUE on success or FALSE on failure.

Examples

1 · array

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");

ksort($array);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
B => Banana
C => apple
a => orange
d => Lemon

2 · sort_flags · SORT_REGULAR

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$sort_flags = SORT_REGULAR;

ksort($array, $sort_flags);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
B => Banana
C => apple
a => orange
d => Lemon

3 · sort_flags · SORT_NUMERIC

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$sort_flags = SORT_NUMERIC;

ksort($array, $sort_flags);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
d => Lemon
a => orange
B => Banana
C => apple

4 · sort_flags · SORT_STRING

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$sort_flags = SORT_STRING;

ksort($array, $sort_flags);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
B => Banana
C => apple
a => orange
d => Lemon

5 · sort_flags · SORT_NATURAL

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$sort_flags = SORT_NATURAL;

ksort($array, $sort_flags);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
B => Banana
C => apple
a => orange
d => Lemon

6 · sort_flags · SORT_FLAG_CASE

<?

$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$sort_flags = SORT_NATURAL | SORT_FLAG_CASE;

ksort($array, $sort_flags);

foreach ($array as $key => $value)
{
    echo "$key => $value\n";
}

?>
a => orange
B => Banana
C => apple
d => Lemon

array

array_change_key_case

array_chunk

array_column

array_combine

array_count_values

array_diff

array_diff_assoc

array_diff_key

array_diff_uassoc

array_diff_ukey

array_fill

array_fill_keys

array_filter

array_flip

array_intersect

array_intersect_assoc

array_intersect_key

array_intersect_uassoc

array_intersect_ukey

array_key_exists

array_key_first

array_key_last

array_keys

array_map

array_merge

array_merge_recursive

array_multisort

array_pad

array_pop

array_product

array_push

array_rand

array_reduce

array_replace

array_replace_recursive

array_reverse

array_search

array_shift

array_slice

array_splice

array_sum

array_udiff

array_udiff_assoc

array_udiff_uassoc

array_uintersect

array_uintersect_assoc

array_uintersect_uassoc

array_unique

array_unshift

array_values

array_walk

array_walk_recursive

arsort

asort

compact

count

current

end

extract

in_array

key

key_exists

krsort

list

natcasesort

natsort

next

pos

prev

range

reset

rsort

shuffle

sizeof

sort

uasort

uksort

usort

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