PHP usort() function

PHP uksort() function
PHP cal_days_in_month() function

In this article, you will learn how to sort an array based on some user-defined function. The usort() function compares array elements by passing them to the user-defined function and sorts them according to the comparison result.

What is the syntax of the usort() function in PHP?

usort(array, myfunction)
arrayThe array to sort – Required
my_functionCallable function name (string).
The callable function compares two values and returns an integer <, =, or > 0 if the first value is <, = or > than second.
PHP usort() function

Examples of usort() function

Example 1. Sort the array elements using the user-defined function.

function my_function($x,$y)
if ($x==$y) return 0;
return ($x<$y)?-1:1;

PHP uksort() function
PHP cal_days_in_month() function
en English
Scroll to Top