PHP asort() Function: Sorting Arrays While Preserving Index Association

The asort() function in PHP sorts an array while maintaining the association between its indices and values, making it useful for associative arrays where the order of elements matters.

Parameters

array – The input array to be sorted.

sort_flags – Optional flag to modify sorting behavior (default SORT_REGULAR).

Return value

Returns TRUE on success or FALSE on failure.

Example

<?php
$fruits = array(
    "d" => "lemon",
    "a" => "orange",
    "b" => "banana",
    "c" => "apple"
);
asort($fruits);
foreach ($fruits as $key => $val) {
    echo "$key = $val
";
}
?>

Output:

c = apple
b = banana
d = lemon
a = orange

The array is sorted alphabetically by value, while the original keys remain linked to their respective values.