What is the purpose of the sort function in PHP?

The sort function in PHP is a sorting function used to arrange arrays in ascending order. It can rearrange the array based on the values of its elements and update the original array.

The sort function will arrange the values of the original array in ascending order while maintaining their original relationships. The indexes of the sorted array will be reassigned starting from 0.

For example, with the following array:
$arr = array(3, 1, 2, 5, 4);

After using the sort function, the array will be sorted as:
$arr = array(1, 2, 3, 4, 5);

The sort function can be used to sort arrays of numbers or strings. When sorting strings, it will be based on alphabetical order.

It is important to note that the sort function will directly modify the original array and will not create a new array copy. If you need to keep the original array, you can create a copy before sorting.