PHP uksort Function

Definition :

In this tutorial we learn about uksort() function.

The uksort() function is used to  sorts an array by keys using a user-defined comparison function.

The keys are preserved, i.e. the key-to-value mapping will remain unchanged by the sort operation.

The basic syntax of the uksort() function is given with:

    uksort(array, compare_function);

The uksort() function accepts the following parameters.

Lets understand with example given below :

Sort the elements of the $arr array by keys using a user-defined comparison function:

Output :

Key=a, Value=17
Key=b, Value=18
Key=c, Value=15
Key=d, Value=19