Definition :
In this tutorial we learned about usort() function
The usort() function is used sorts an array by values using a user-defined comparison function.
The basic syntax of the usort() function is given with:
usort(array, compare_function);
The usort() function accepts the following parameters.
| Parameter | Description |
|---|---|
| array | Required. Specifies the array to be sorted. |
| compare_function | Optional. Specifies the compare function to use for sorting. |
Let's understand with given below example
sort the elements of the $arr array using a user-defined comparison function
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Output :
15
17
18
19