How to use php usort function

How to use php usort() function

php usort() function definition and usage

usort() usage User-defined comparison function sorts arrays.

Syntax

usort(array,myfunction);

Parameters

array required. Specifies the array to be sorted.

myfunction Optional. A string that defines a callable comparison function. If the first argument is <, =, > and the second argument is, the corresponding comparison function must return an integer of <, =, > 0.

Example

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

Output:

2 4 6 8

The above is the detailed content of How to use php usort function. For more information, please follow other related articles on the PHP Chinese website!