How php arrays sort and maintain indexed relationships

This article mainly introduces the php array how to sort and maintain the index relationship of the relevant knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that after reading this php array how to sort and maintain the index relationship article will have a harvest, let's take a look.

1. Description

Uasort is that the values in the array are sorted by a user-defined comparison function and the index association is maintained. It is mainly used to sort multi-dimensional arrays according to the custom method and retain the index relationship.

2. Grammar

Uasort (array,myfunction)

3. Parameters

Array, specifying the array to be sorted

Myfunction, which defines a string that can call a function

4. Return value

TRUE is returned for success and FALSE is returned for failure.

5. Examples

Uasort ($list, function ($a, $b) {if ($a ['sort'] = = $b [' sort']) {return 0;} return ($a ['sort'] < $b [' sort'])? 1:-1; / /-1 go up, go forward})

For functions in sorting, we still have a wide range of options. If you want to sort the comparison function, uasort is a good choice, because it can also maintain the index relationship, we will often see its sorting use in multidimensional arrays.

This is the end of the article on how to sort and maintain indexed relationships in php arrays. Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to sort php arrays and maintain index relationships". If you want to learn more, you are welcome to follow the industry information channel.