How to use the array_filter () function to filter arrays in php

In this article Xiaobian introduces in detail "how to use array_filter () function to filter arrays in php", the content is detailed, the steps are clear, and the details are handled properly. I hope that this article "how to use array_filter () function to filter arrays in php" can help you solve your doubts.

1. Definition

Array_filter uses callback functions to handle individual elements in the array.

The point is to filter (rather than add) an element, and when you deal with an element, if false is returned, the element will be filtered out. PS: the original index is maintained.

2. Grammar

Array array_filter (array $array [, callable $callback [, int $flag = 0]])

3. Parameters

Array

Callback

Flag

4. Return value

Returns the filtered array.

5. Examples

$arr2 = array ('axie = > 1 print_r print_r = > 2 resArr2) {if ($arr) {if ($arr% 2 = 1) {return $arr = {return $arr = 1) }} read here, this article "how to use the array_filter () function to filter arrays in php" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it before you can understand it. If you want to know more about related articles, welcome to follow the industry information channel.