PHP reference

asort

Sorts an array by value, keeping the keys.

Syntax

asort(array &$array, int $flags = SORT_REGULAR): true

Parameter	Type	Description
$array	array	The array being sorted.
$flags	int	Optional. The comparison mode.

trueAlways `true`; the array itself is modified.

Products by ascending price:

<?php
 
$prices = ['tea' => 250, 'juice' => 180, 'coffee' => 400];
 
asort($prices);
 
echo json_encode($prices);

Output:

{"juice":180,"tea":250,"coffee":400}

Descending — arsort():

<?php
 
$scores = ['Anna' => 82, 'Oleg' => 95];
 
arsort($scores);
 
echo array_key_first($scores);

Output:

Oleg

Plain sort() would replace the product names with numbers.

Sorting arrays — Sorting in PHP — sort, rsort, asort, ksort, a custom rule with usort and the spaceship operator.