Sort an array in reverse order and maintain index association
Syntax
arsort(array &$array, int $flags = SORT_REGULAR): bool
Parameters
arrayThe input array.
flagsModify the sorting behavior.
| Constant | Description |
|---|---|
| SORT_REGULAR | compare items normally; the details are described in the comparison operators div |
| 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
Always returns true.
Examples
1 · array
<?
$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
arsort($array);
foreach($array as $key => $value)
{
echo "$key => $value\n";
}
?>a => orange C => apple d => Lemon B => Banana
2 · flags
<?
$array = array("d" => "Lemon", "a" => "orange", "B" => "Banana", "C" => "apple");
$flags = SORT_NATURAL | SORT_FLAG_CASE;
arsort($array, $flags);
foreach($array as $key => $value)
{
echo "$key => $value\n";
}
?>a => orange d => Lemon B => Banana C => apple
