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
