PHP asort() Function

PHP asort() Function is used to sort an associative array in ascending order. An asort() function is built-in function in PHP.

Syntax :

asort(array $array , $sort_type = SORT_REGULAR);

Parameter,

$array : Required. It is input array.

$sort_type : Optional. $sort_type may be used to modify the sorting behavior using below values.

1. SORT_REGULAR - Default. Compare items normally (don't change types).
2. SORT_NUMERIC - Compare items numerically.
3. SORT_STRING - Compare items as strings.
4. SORT_LOCALE_STRING - Compare items as strings that based on current locale.
5. SORT_NATURAL - Compare items as strings using natural ordering.
6. SORT_FLAG_CASE -  It can be combined with SORT_STRING or SORT_NATURAL to sort strings case-insensitively.

 Return Values :

It returns true on success or false on failure. A asort() Function sorts an associative array in ascending order according to the value and maintain its preserved index key.

Let's see below example to understand php asort() Function in details.