What is the purpose of the PHP asort function?

The asort() function in PHP is used to sort an associative array in ascending order based on its values while maintaining the key-value relationship.

Specifically, the asort() function will sort the array based on the values while maintaining the key-value associations within the array. After the sorting is complete, the original key-value associations in the array will not change, but the values within the array will be rearranged in ascending order.

Here is an example of using the asort() function:

$fruits = array("apple" => 4, "orange" => 2, "banana" => 3);
asort($fruits);

// 输出排序后的数组
foreach ($fruits as $key => $value) {
    echo "$key: $value\n";
}

In the example above, the asort() function sorts the $fruits array in ascending order based on its values while keeping the key-value associations unchanged, resulting in the output of the sorted array.