How is the PHP sort sorting algorithm used?

In PHP, the sort() function can be used to sort arrays. The sort() function arranges the values of the array in ascending order and re-indexes them.

Here is an example demonstrating how to use the sort() function to sort an array:

$fruits = array("apple", "banana", "orange", "grape");
sort($fruits);

foreach ($fruits as $fruit) {
    echo $fruit . " ";
}

The output is: apple banana grape orange

To sort in descending order, you can use the rsort() function. Similarly, the rsort() function will sort the values of the array and re-establish index associations.

Here is an example demonstrating how to use the rsort() function to sort an array.

$fruits = array("apple", "banana", "orange", "grape");
rsort($fruits);

foreach ($fruits as $fruit) {
    echo $fruit . " ";
}

The output is: orange grape banana apple

In addition to using the sort() and rsort() functions, you can also use other sorting functions like asort() and arsort() to sort associative arrays based on their values. The choice of sorting function depends on the sorting requirements and the type of array.