PHP asort Function Explained

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.